├── .gitignore
├── PathHitTesting.xcodeproj
    ├── project.pbxproj
    └── project.xcworkspace
    │   └── contents.xcworkspacedata
├── PathHitTesting
    ├── AppDelegate.h
    ├── AppDelegate.m
    ├── DrawingView.h
    ├── DrawingView.m
    ├── PathHitTesting-Info.plist
    ├── PathHitTesting-Prefix.pch
    ├── Shape.h
    ├── Shape.m
    ├── ViewController.h
    ├── ViewController.m
    ├── en.lproj
    │   ├── InfoPlist.strings
    │   └── MainStoryboard.storyboard
    └── main.m
└── README.markdown


/.gitignore:
--------------------------------------------------------------------------------
1 | .DS_Store
2 | build/
3 | *.pbxuser
4 | *.mode1v3
5 | xcuserdata/
6 | 


--------------------------------------------------------------------------------
/PathHitTesting.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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 61 | 				5D892D2C14D6F72B005B3273 /* Products */,
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 63 | 			sourceTree = "<group>";
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 65 | 		5D892D2C14D6F72B005B3273 /* Products */ = {
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 68 | 				5D892D2B14D6F72B005B3273 /* PathHitTesting.app */,
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 70 | 			name = Products;
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 73 | 		5D892D2E14D6F72B005B3273 /* Frameworks */ = {
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 80 | 			name = Frameworks;
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100 | 		5D892D3614D6F72B005B3273 /* Supporting Files */ = {
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106 | 				5D892D3D14D6F72C005B3273 /* PathHitTesting-Prefix.pch */,
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108 | 			name = "Supporting Files";
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117 | 			buildPhases = (
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119 | 				5D892D2814D6F72B005B3273 /* Frameworks */,
120 | 				5D892D2914D6F72B005B3273 /* Resources */,
121 | 			);
122 | 			buildRules = (
123 | 			);
124 | 			dependencies = (
125 | 			);
126 | 			name = PathHitTesting;
127 | 			productName = PathHitTesting;
128 | 			productReference = 5D892D2B14D6F72B005B3273 /* PathHitTesting.app */;
129 | 			productType = "com.apple.product-type.application";
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133 | /* Begin PBXProject section */
134 | 		5D892D2214D6F72B005B3273 /* Project object */ = {
135 | 			isa = PBXProject;
136 | 			attributes = {
137 | 				LastUpgradeCheck = 0420;
138 | 				ORGANIZATIONNAME = "Ole Begemann";
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140 | 			buildConfigurationList = 5D892D2514D6F72B005B3273 /* Build configuration list for PBXProject "PathHitTesting" */;
141 | 			compatibilityVersion = "Xcode 3.2";
142 | 			developmentRegion = English;
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150 | 			projectRoot = "";
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152 | 				5D892D2A14D6F72B005B3273 /* PathHitTesting */,
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164 | 			);
165 | 			runOnlyForDeploymentPostprocessing = 0;
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177 | 				5D892D4E14D6F77E005B3273 /* DrawingView.m in Sources */,
178 | 				5D892D5414D70066005B3273 /* Shape.m in Sources */,
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185 | 		5D892D3814D6F72B005B3273 /* InfoPlist.strings */ = {
186 | 			isa = PBXVariantGroup;
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188 | 				5D892D3914D6F72B005B3273 /* en */,
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190 | 			name = InfoPlist.strings;
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196 | 				5D892D4214D6F72C005B3273 /* en */,
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198 | 			name = MainStoryboard.storyboard;
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208 | 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
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210 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
211 | 				COPY_PHASE_STRIP = NO;
212 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
213 | 				GCC_DYNAMIC_NO_PIC = NO;
214 | 				GCC_OPTIMIZATION_LEVEL = 0;
215 | 				GCC_PREPROCESSOR_DEFINITIONS = (
216 | 					"DEBUG=1",
217 | 					"$(inherited)",
218 | 				);
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221 | 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
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225 | 				SDKROOT = iphoneos;
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228 | 			name = Debug;
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232 | 			buildSettings = {
233 | 				ALWAYS_SEARCH_USER_PATHS = NO;
234 | 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
235 | 				CLANG_ENABLE_OBJC_ARC = YES;
236 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
237 | 				COPY_PHASE_STRIP = YES;
238 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
239 | 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
240 | 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
241 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
242 | 				GCC_WARN_UNUSED_VARIABLE = YES;
243 | 				IPHONEOS_DEPLOYMENT_TARGET = 5.0;
244 | 				OTHER_CFLAGS = "-DNS_BLOCK_ASSERTIONS=1";
245 | 				SDKROOT = iphoneos;
246 | 				TARGETED_DEVICE_FAMILY = 2;
247 | 				VALIDATE_PRODUCT = YES;
248 | 			};
249 | 			name = Release;
250 | 		};
251 | 		5D892D4A14D6F72C005B3273 /* Debug */ = {
252 | 			isa = XCBuildConfiguration;
253 | 			buildSettings = {
254 | 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
255 | 				GCC_PREFIX_HEADER = "PathHitTesting/PathHitTesting-Prefix.pch";
256 | 				INFOPLIST_FILE = "PathHitTesting/PathHitTesting-Info.plist";
257 | 				PRODUCT_NAME = "$(TARGET_NAME)";
258 | 				WRAPPER_EXTENSION = app;
259 | 			};
260 | 			name = Debug;
261 | 		};
262 | 		5D892D4B14D6F72C005B3273 /* Release */ = {
263 | 			isa = XCBuildConfiguration;
264 | 			buildSettings = {
265 | 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
266 | 				GCC_PREFIX_HEADER = "PathHitTesting/PathHitTesting-Prefix.pch";
267 | 				INFOPLIST_FILE = "PathHitTesting/PathHitTesting-Info.plist";
268 | 				PRODUCT_NAME = "$(TARGET_NAME)";
269 | 				WRAPPER_EXTENSION = app;
270 | 			};
271 | 			name = Release;
272 | 		};
273 | /* End XCBuildConfiguration section */
274 | 
275 | /* Begin XCConfigurationList section */
276 | 		5D892D2514D6F72B005B3273 /* Build configuration list for PBXProject "PathHitTesting" */ = {
277 | 			isa = XCConfigurationList;
278 | 			buildConfigurations = (
279 | 				5D892D4714D6F72C005B3273 /* Debug */,
280 | 				5D892D4814D6F72C005B3273 /* Release */,
281 | 			);
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283 | 			defaultConfigurationName = Release;
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285 | 		5D892D4914D6F72C005B3273 /* Build configuration list for PBXNativeTarget "PathHitTesting" */ = {
286 | 			isa = XCConfigurationList;
287 | 			buildConfigurations = (
288 | 				5D892D4A14D6F72C005B3273 /* Debug */,
289 | 				5D892D4B14D6F72C005B3273 /* Release */,
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294 | 	};
295 | 	rootObject = 5D892D2214D6F72B005B3273 /* Project object */;
296 | }
297 | 


--------------------------------------------------------------------------------
/PathHitTesting.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:PathHitTesting.xcodeproj">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/PathHitTesting/AppDelegate.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.h
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate : UIResponder <UIApplicationDelegate>
12 | 
13 | @property (strong, nonatomic) UIWindow *window;
14 | 
15 | @end
16 | 


--------------------------------------------------------------------------------
/PathHitTesting/AppDelegate.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.m
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate.h"
10 | 
11 | @implementation AppDelegate
12 | 
13 | @synthesize window = _window;
14 | 
15 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
16 | {
17 |     // Override point for customization after application launch.
18 |     return YES;
19 | }
20 | 							
21 | - (void)applicationWillResignActive:(UIApplication *)application
22 | {
23 |     /*
24 |      Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
25 |      Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
26 |      */
27 | }
28 | 
29 | - (void)applicationDidEnterBackground:(UIApplication *)application
30 | {
31 |     /*
32 |      Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
33 |      If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
34 |      */
35 | }
36 | 
37 | - (void)applicationWillEnterForeground:(UIApplication *)application
38 | {
39 |     /*
40 |      Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
41 |      */
42 | }
43 | 
44 | - (void)applicationDidBecomeActive:(UIApplication *)application
45 | {
46 |     /*
47 |      Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
48 |      */
49 | }
50 | 
51 | - (void)applicationWillTerminate:(UIApplication *)application
52 | {
53 |     /*
54 |      Called when the application is about to terminate.
55 |      Save data if appropriate.
56 |      See also applicationDidEnterBackground:.
57 |      */
58 | }
59 | 
60 | @end
61 | 


--------------------------------------------------------------------------------
/PathHitTesting/DrawingView.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  DrawingView.h
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @protocol DrawingViewDataSource;
12 | 
13 | @interface DrawingView : UIView
14 | 
15 | @property (nonatomic, weak) IBOutlet id <DrawingViewDataSource> dataSource;
16 | 
17 | - (void)reloadData;
18 | - (void)reloadDataInRect:(CGRect)rect;
19 | 
20 | @end
21 | 
22 | 
23 | @protocol DrawingViewDataSource <NSObject>
24 | 
25 | @required
26 | - (NSUInteger)numberOfShapesInDrawingView:(DrawingView *)drawingView;
27 | - (UIBezierPath *)drawingView:(DrawingView *)drawingView pathForShapeAtIndex:(NSUInteger)shapeIndex;
28 | - (UIColor *)drawingView:(DrawingView *)drawingView lineColorForShapeAtIndex:(NSUInteger)shapeIndex;
29 | 
30 | @optional
31 | - (NSUInteger)indexOfSelectedShapeInDrawingView:(DrawingView *)drawingView;
32 | 
33 | @end


--------------------------------------------------------------------------------
/PathHitTesting/DrawingView.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  DrawingView.m
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import "DrawingView.h"
10 | #import "Shape.h"
11 | 
12 | 
13 | @implementation DrawingView
14 | 
15 | @synthesize dataSource = _dataSource;
16 | 
17 | - (void)reloadData
18 | {
19 |     [self setNeedsDisplay];
20 | }
21 | 
22 | - (void)reloadDataInRect:(CGRect)rect
23 | {
24 |     [self setNeedsDisplayInRect:rect];
25 | }
26 | 
27 | - (void)drawRect:(CGRect)rect
28 | {
29 |     NSUInteger numberOfShapes = [self.dataSource numberOfShapesInDrawingView:self];
30 |     NSUInteger indexOfSelectedShape = NSNotFound;
31 |     if ([self.dataSource respondsToSelector:@selector(indexOfSelectedShapeInDrawingView:)]) {
32 |         indexOfSelectedShape = [self.dataSource indexOfSelectedShapeInDrawingView:self];
33 |     }
34 |     
35 |     for (NSUInteger shapeIndex = 0; shapeIndex < numberOfShapes; shapeIndex++) 
36 |     {
37 |         UIBezierPath *path = [self.dataSource drawingView:self pathForShapeAtIndex:shapeIndex];
38 |         if (CGRectIntersectsRect(rect, CGRectInset(path.bounds, -(path.lineWidth + 1.0f), -(path.lineWidth + 1.0f)))) 
39 |         {
40 |             UIColor *lineColor = [self.dataSource drawingView:self lineColorForShapeAtIndex:shapeIndex];
41 |             [lineColor setStroke];
42 |             [path stroke];
43 | 
44 |             if (shapeIndex == indexOfSelectedShape) {
45 |                 UIBezierPath *pathCopy = [path copy];
46 |                 CGPathRef cgPathSelectionRect = CGPathCreateCopyByStrokingPath(pathCopy.CGPath, NULL, pathCopy.lineWidth, pathCopy.lineCapStyle, pathCopy.lineJoinStyle, pathCopy.miterLimit);
47 |                 UIBezierPath *selectionRect = [UIBezierPath bezierPathWithCGPath:cgPathSelectionRect];
48 |                 CGPathRelease(cgPathSelectionRect);
49 | 
50 |                 CGFloat dashStyle[] = { 5.0f, 5.0f };
51 |                 [selectionRect setLineDash:dashStyle count:2 phase:0];
52 |                 [[UIColor blackColor] setStroke];
53 |                 [selectionRect stroke];
54 |             }
55 |         }
56 |     }
57 | }
58 | 
59 | @end
60 | 


--------------------------------------------------------------------------------
/PathHitTesting/PathHitTesting-Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleDisplayName</key>
 8 | 	<string>${PRODUCT_NAME}</string>
 9 | 	<key>CFBundleExecutable</key>
10 | 	<string>${EXECUTABLE_NAME}</string>
11 | 	<key>CFBundleIconFiles</key>
12 | 	<array/>
13 | 	<key>CFBundleIdentifier</key>
14 | 	<string>com.olebegemann.${PRODUCT_NAME:rfc1034identifier}</string>
15 | 	<key>CFBundleInfoDictionaryVersion</key>
16 | 	<string>6.0</string>
17 | 	<key>CFBundleName</key>
18 | 	<string>${PRODUCT_NAME}</string>
19 | 	<key>CFBundlePackageType</key>
20 | 	<string>APPL</string>
21 | 	<key>CFBundleShortVersionString</key>
22 | 	<string>1.0</string>
23 | 	<key>CFBundleSignature</key>
24 | 	<string>????</string>
25 | 	<key>CFBundleVersion</key>
26 | 	<string>1.0</string>
27 | 	<key>LSRequiresIPhoneOS</key>
28 | 	<true/>
29 | 	<key>UIMainStoryboardFile</key>
30 | 	<string>MainStoryboard</string>
31 | 	<key>UIRequiredDeviceCapabilities</key>
32 | 	<array>
33 | 		<string>armv7</string>
34 | 	</array>
35 | 	<key>UISupportedInterfaceOrientations~ipad</key>
36 | 	<array>
37 | 		<string>UIInterfaceOrientationPortrait</string>
38 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
39 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
40 | 		<string>UIInterfaceOrientationLandscapeRight</string>
41 | 	</array>
42 | </dict>
43 | </plist>
44 | 


--------------------------------------------------------------------------------
/PathHitTesting/PathHitTesting-Prefix.pch:
--------------------------------------------------------------------------------
 1 | //
 2 | // Prefix header for all source files of the 'PathHitTesting' target in the 'PathHitTesting' project
 3 | //
 4 | 
 5 | #import <Availability.h>
 6 | 
 7 | #ifndef __IPHONE_5_0
 8 | #warning "This project uses features only available in iOS SDK 5.0 and later."
 9 | #endif
10 | 
11 | #ifdef __OBJC__
12 |     #import <UIKit/UIKit.h>
13 |     #import <Foundation/Foundation.h>
14 | #endif
15 | 


--------------------------------------------------------------------------------
/PathHitTesting/Shape.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  Shape.h
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import <Foundation/Foundation.h>
10 | 
11 | typedef enum {
12 |     ShapeTypeRect,
13 |     ShapeTypeEllipse,
14 |     ShapeTypeHouse,
15 |     ShapeTypeArc,
16 |     SHAPE_TYPE_COUNT
17 | } ShapeType;
18 | 
19 | 
20 | @interface Shape : NSObject
21 | 
22 | + (id)randomShapeInBounds:(CGRect)maxBounds;
23 | + (id)shapeWithPath:(UIBezierPath *)path lineColor:(UIColor *)lineColor;
24 | - (id)initWithPath:(UIBezierPath *)path lineColor:(UIColor *)lineColor;
25 | 
26 | - (BOOL)containsPoint:(CGPoint)point;
27 | - (void)moveBy:(CGPoint)delta;
28 | 
29 | @property (nonatomic, strong) UIBezierPath *path;
30 | @property (nonatomic, strong) UIColor *lineColor;
31 | @property (nonatomic, assign, readonly) CGRect totalBounds;
32 | 
33 | @end
34 | 


--------------------------------------------------------------------------------
/PathHitTesting/Shape.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  Shape.m
  3 | //  PathHitTesting
  4 | //
  5 | //  Created by Ole Begemann on 30.01.12.
  6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
  7 | //
  8 | 
  9 | #import "Shape.h"
 10 | 
 11 | @interface Shape ()
 12 | 
 13 | @property (nonatomic, strong) UIBezierPath *tapTarget;
 14 | 
 15 | - (UIBezierPath *)tapTargetForPath:(UIBezierPath *)path;
 16 | 
 17 | + (ShapeType)randomShapeType;
 18 | + (CGRect)randomRectInBounds:(CGRect)maxBounds;
 19 | + (UIColor *)randomColor;
 20 | + (CGFloat)randomLineWidth;
 21 | + (UIBezierPath *)houseInRect:(CGRect)bounds;
 22 | + (UIBezierPath *)arcInRect:(CGRect)bounds;
 23 | 
 24 | @end
 25 | 
 26 | 
 27 | @implementation Shape
 28 | 
 29 | @synthesize path = _path;
 30 | @synthesize lineColor = _lineColor;
 31 | @synthesize tapTarget = _tapTarget;
 32 | @dynamic totalBounds;
 33 | 
 34 | 
 35 | + (id)randomShapeInBounds:(CGRect)maxBounds
 36 | {
 37 |     UIBezierPath *path = nil;
 38 |     CGRect bounds = [self randomRectInBounds:maxBounds];
 39 |     ShapeType type = [self randomShapeType];
 40 |     switch (type) {
 41 |         case ShapeTypeRect:
 42 |             path = [UIBezierPath bezierPathWithRect:bounds];
 43 |             break;
 44 |         case ShapeTypeEllipse:
 45 |             path = [UIBezierPath bezierPathWithOvalInRect:bounds];
 46 |             break;
 47 |         case ShapeTypeHouse:
 48 |             path = [self houseInRect:bounds];
 49 |             break;
 50 |         case ShapeTypeArc:
 51 |             path = [self arcInRect:bounds];
 52 |             break;
 53 |         default:
 54 |             path = [UIBezierPath bezierPathWithRect:bounds];
 55 |             break;
 56 |     }
 57 | 
 58 |     path.lineWidth = [self randomLineWidth];
 59 |     UIColor *lineColor = [self randomColor];
 60 |     
 61 |     return [[self alloc] initWithPath:path lineColor:lineColor];
 62 | }
 63 | 
 64 | + (id)shapeWithPath:(UIBezierPath *)path lineColor:(UIColor *)lineColor
 65 | {
 66 |     return [[self alloc] initWithPath:path lineColor:lineColor];
 67 | }
 68 | 
 69 | - (id)initWithPath:(UIBezierPath *)path lineColor:(UIColor *)lineColor
 70 | {
 71 |     self = [super init];
 72 |     if (self != nil) {
 73 |         _path = path;
 74 |         _lineColor = lineColor;
 75 |         _tapTarget = [self tapTargetForPath:_path];
 76 |     }
 77 |     return self;
 78 | }
 79 | 
 80 | - (id)init
 81 | {
 82 |     UIBezierPath *defaultPath = [UIBezierPath bezierPathWithRect:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)];
 83 |     UIColor *defaultLineColor = [UIColor blackColor];
 84 |     return [self initWithPath:defaultPath lineColor:defaultLineColor];
 85 | }
 86 | 
 87 | 
 88 | #pragma mark - Description
 89 | 
 90 | - (NSString *)description
 91 | {
 92 |     return [NSString stringWithFormat:@"<Shape: %p - Bounds: %@ - Color: %@>", self, NSStringFromCGRect(self.path.bounds), self.lineColor];
 93 | }
 94 | 
 95 | 
 96 | #pragma mark - Hit Testing
 97 | 
 98 | - (UIBezierPath *)tapTargetForPath:(UIBezierPath *)path
 99 | {
100 |     if (path == nil) {
101 |         return nil;
102 |     }
103 |     
104 |     CGPathRef tapTargetPath = CGPathCreateCopyByStrokingPath(path.CGPath, NULL, fmaxf(35.0f, path.lineWidth), path.lineCapStyle, path.lineJoinStyle, path.miterLimit);
105 |     
106 |     if (tapTargetPath == NULL) {
107 |         return nil;
108 |     }
109 |     
110 |     UIBezierPath *tapTarget = [UIBezierPath bezierPathWithCGPath:tapTargetPath];
111 |     CGPathRelease(tapTargetPath);
112 |     return tapTarget;
113 | }
114 | 
115 | - (BOOL)containsPoint:(CGPoint)point
116 | {
117 |     return [self.tapTarget containsPoint:point];
118 | }
119 | 
120 | 
121 | #pragma mark - Bounds
122 | 
123 | - (CGRect)totalBounds
124 | {
125 |     if (self.path == nil) {
126 |         return CGRectZero;
127 |     }
128 |     
129 |     return CGRectInset(self.path.bounds, -(self.path.lineWidth + 1.0f), -(self.path.lineWidth + 1.0f));
130 | }
131 | 
132 | 
133 | #pragma mark - Modifying Shapes
134 | 
135 | - (void)moveBy:(CGPoint)delta
136 | {
137 |     CGAffineTransform transform = CGAffineTransformMakeTranslation(delta.x, delta.y);
138 |     [self.path applyTransform:transform];
139 |     [self.tapTarget applyTransform:transform];
140 | }
141 | 
142 | 
143 | 
144 | #pragma mark - Random Shape Generator Methods
145 | 
146 | + (ShapeType)randomShapeType
147 | {
148 |     return arc4random_uniform(SHAPE_TYPE_COUNT);
149 | }
150 | 
151 | + (CGRect)randomRectInBounds:(CGRect)maxBounds
152 | {
153 |     CGRect normalizedBounds = CGRectStandardize(maxBounds);
154 |     uint32_t minOriginX = normalizedBounds.origin.x;
155 |     uint32_t minOriginY = normalizedBounds.origin.y;
156 |     uint32_t minWidth = 44;
157 |     uint32_t minHeight = 44;
158 | 
159 |     uint32_t maxOriginX = normalizedBounds.size.width - minWidth;
160 |     uint32_t maxOriginY = normalizedBounds.size.height - minHeight;
161 | 
162 |     uint32_t originX = arc4random_uniform(maxOriginX - minOriginX) + minOriginX;
163 |     uint32_t originY = arc4random_uniform(maxOriginY - minOriginY) + minOriginY;
164 |     
165 |     uint32_t maxWidth = normalizedBounds.size.width - originX;
166 |     uint32_t maxHeight = normalizedBounds.size.height - originY;
167 | 
168 |     uint32_t width = arc4random_uniform(maxWidth - minWidth) + minWidth;
169 |     uint32_t height = arc4random_uniform(maxHeight - minHeight) + minHeight;
170 |     
171 |     CGRect randomRect = CGRectMake(originX, originY, width, height);
172 |     return randomRect;
173 | }
174 | 
175 | + (UIColor *)randomColor
176 | {
177 |     NSArray *colors = [NSArray arrayWithObjects:
178 |                        [UIColor blueColor], 
179 |                        [UIColor redColor], 
180 |                        [UIColor greenColor], 
181 |                        [UIColor yellowColor], 
182 |                        [UIColor magentaColor], 
183 |                        [UIColor brownColor], 
184 |                        [UIColor purpleColor], 
185 |                        [UIColor orangeColor], 
186 |                        nil];
187 |     uint32_t colorIndex = arc4random_uniform([colors count]);
188 |     return [colors objectAtIndex:colorIndex];
189 | }
190 | 
191 | + (CGFloat)randomLineWidth
192 | {
193 |     uint32_t maxLineWidth = 15;
194 |     CGFloat lineWidth = arc4random_uniform(maxLineWidth) + 1.0f; // avoid lineWidth == 0.0f
195 |     return lineWidth;
196 | }
197 | 
198 | + (UIBezierPath *)houseInRect:(CGRect)bounds
199 | {
200 |     CGPoint bottomLeft 	= CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds));
201 |     CGPoint topLeft		= CGPointMake(CGRectGetMinX(bounds), CGRectGetMinY(bounds) + CGRectGetHeight(bounds) * 2.0f/3.0f);
202 |     CGPoint bottomRight = CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
203 |     CGPoint topRight	= CGPointMake(CGRectGetMaxX(bounds), CGRectGetMinY(bounds) + CGRectGetHeight(bounds) * 2.0f/3.0f);
204 |     CGPoint roofTip		= CGPointMake(CGRectGetMidX(bounds), CGRectGetMaxY(bounds));
205 |     
206 |     UIBezierPath *path = [UIBezierPath bezierPath];
207 |     [path moveToPoint:bottomLeft];
208 |     [path addLineToPoint:topLeft];
209 |     [path addLineToPoint:roofTip];
210 |     [path addLineToPoint:topRight];
211 |     [path addLineToPoint:topLeft];
212 |     [path addLineToPoint:bottomRight];
213 |     [path addLineToPoint:topRight];
214 |     [path addLineToPoint:bottomLeft];
215 |     [path addLineToPoint:bottomRight];
216 |     
217 |     path.lineJoinStyle = kCGLineJoinRound;
218 | 
219 |     CGAffineTransform transform = CGAffineTransformIdentity;
220 |     transform = CGAffineTransformTranslate(transform, bounds.origin.x, bounds.origin.y);
221 |     transform = CGAffineTransformTranslate(transform, 0.0, bounds.size.height);
222 |     transform = CGAffineTransformScale(transform, 1.0f, -1.0f);
223 |     transform = CGAffineTransformTranslate(transform, -bounds.origin.x, -bounds.origin.y);
224 |     [path applyTransform:transform];
225 |     
226 |     return path;
227 | }
228 | 
229 | + (UIBezierPath *)arcInRect:(CGRect)bounds
230 | {
231 |     CGPoint center      = CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
232 |     CGPoint centerRight = CGPointMake(CGRectGetMaxX(bounds), CGRectGetMidY(bounds));
233 |     CGFloat radius      = CGRectGetWidth(bounds) / 2.0f;
234 |     CGPoint center2     = CGPointMake(center.x, center.y - radius / 2.0f);
235 |     
236 |     UIBezierPath *path = [UIBezierPath bezierPath];
237 |     [path moveToPoint:centerRight];
238 |     [path addArcWithCenter:center radius:radius startAngle:0.0f endAngle:M_PI * 1.5f clockwise:YES];
239 |     [path addArcWithCenter:center2 radius:radius / 2.0f startAngle:M_PI * 1.5f endAngle:M_PI clockwise:YES];
240 |     
241 |     path.lineJoinStyle = kCGLineJoinRound;
242 |     
243 |     CGAffineTransform transform = CGAffineTransformIdentity;
244 |     transform = CGAffineTransformTranslate(transform, bounds.origin.x, bounds.origin.y);
245 |     transform = CGAffineTransformTranslate(transform, 0.0, bounds.size.height);
246 |     transform = CGAffineTransformScale(transform, 1.0f, -1.0f);
247 |     transform = CGAffineTransformTranslate(transform, -bounds.origin.x, -bounds.origin.y);
248 |     [path applyTransform:transform];
249 |     
250 |     return path;
251 | }
252 | 
253 | @end
254 | 


--------------------------------------------------------------------------------
/PathHitTesting/ViewController.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.h
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | #import "DrawingView.h"
11 | 
12 | @interface ViewController : UIViewController <DrawingViewDataSource>
13 | 
14 | @property (weak, nonatomic) IBOutlet DrawingView *drawingView;
15 | @property (weak, nonatomic) IBOutlet UIBarButtonItem *deleteShapeButton;
16 | 
17 | - (IBAction)addButtonTapped:(id)sender;
18 | - (IBAction)deleteButtonTapped:(id)sender;
19 | 
20 | @end
21 | 


--------------------------------------------------------------------------------
/PathHitTesting/ViewController.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  ViewController.m
  3 | //  PathHitTesting
  4 | //
  5 | //  Created by Ole Begemann on 30.01.12.
  6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
  7 | //
  8 | 
  9 | #import "ViewController.h"
 10 | #import "Shape.h"
 11 | 
 12 | 
 13 | @interface ViewController ()
 14 | 
 15 | @property (nonatomic, strong) NSMutableArray *shapes;
 16 | @property (nonatomic, assign) NSUInteger selectedShapeIndex;
 17 | @property (nonatomic, readonly) Shape *selectedShape;
 18 | 
 19 | - (void)addShape:(Shape *)newShape;
 20 | - (NSUInteger)hitTest:(CGPoint)point;
 21 | 
 22 | @end
 23 | 
 24 | 
 25 | 
 26 | @implementation ViewController
 27 | 
 28 | @synthesize drawingView = _drawingView;
 29 | @synthesize deleteShapeButton = _deleteShapeButton;
 30 | @synthesize shapes = _shapes;
 31 | @synthesize selectedShapeIndex = _selectedShapeIndex;
 32 | @dynamic selectedShape;
 33 | 
 34 | 
 35 | - (void)didReceiveMemoryWarning
 36 | {
 37 |     [super didReceiveMemoryWarning];
 38 |     // Release any cached data, images, etc that aren't in use.
 39 | }
 40 | 
 41 | #pragma mark - View lifecycle
 42 | 
 43 | - (void)viewDidLoad
 44 | {
 45 |     [super viewDidLoad];
 46 | 	// Do any additional setup after loading the view, typically from a nib.
 47 |     
 48 |     _selectedShapeIndex = NSNotFound;
 49 |     self.shapes = [NSMutableArray array];
 50 |     
 51 |     UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected:)];
 52 |     [self.drawingView addGestureRecognizer:tapRecognizer];
 53 |     
 54 |     UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panDetected:)];
 55 |     [self.drawingView addGestureRecognizer:panRecognizer];
 56 |     
 57 |     [self.drawingView reloadData];
 58 | }
 59 | 
 60 | - (void)viewDidUnload
 61 | {
 62 |     [self setDrawingView:nil];
 63 |     [self setDeleteShapeButton:nil];
 64 |     [super viewDidUnload];
 65 |     // Release any retained subviews of the main view.
 66 |     // e.g. self.myOutlet = nil;
 67 | }
 68 | 
 69 | - (void)viewWillAppear:(BOOL)animated
 70 | {
 71 |     [super viewWillAppear:animated];
 72 | }
 73 | 
 74 | - (void)viewDidAppear:(BOOL)animated
 75 | {
 76 |     [super viewDidAppear:animated];
 77 | }
 78 | 
 79 | - (void)viewWillDisappear:(BOOL)animated
 80 | {
 81 | 	[super viewWillDisappear:animated];
 82 | }
 83 | 
 84 | - (void)viewDidDisappear:(BOOL)animated
 85 | {
 86 | 	[super viewDidDisappear:animated];
 87 | }
 88 | 
 89 | - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
 90 | {
 91 |     // Return YES for supported orientations
 92 |     return YES;
 93 | }
 94 | 
 95 | 
 96 | #pragma mark - Shape management
 97 | 
 98 | - (IBAction)addButtonTapped:(id)sender 
 99 | {
100 |     CGRect maxBounds = CGRectInset(self.drawingView.bounds, 10.0f, 10.0f);
101 |     Shape *newShape = [Shape randomShapeInBounds:maxBounds];
102 |     [self addShape:newShape];
103 | }
104 | 
105 | - (void)addShape:(Shape *)newShape
106 | {
107 |     [self.shapes addObject:newShape];
108 |     [self.drawingView reloadDataInRect:newShape.totalBounds];
109 | }
110 | 
111 | - (IBAction)deleteButtonTapped:(id)sender 
112 | {
113 |     if (self.selectedShapeIndex == NSNotFound) {
114 |         return;
115 |     }
116 |     
117 |     CGRect rectToRedraw = self.selectedShape.totalBounds;
118 |     [self.shapes removeObjectAtIndex:self.selectedShapeIndex];
119 |     self.selectedShapeIndex = NSNotFound;
120 |     [self.drawingView reloadDataInRect:rectToRedraw];
121 | }
122 | 
123 | - (void)setSelectedShapeIndex:(NSUInteger)selectedShapeIndex
124 | {
125 |     CGRect oldSelectionBounds = CGRectZero;
126 |     if (_selectedShapeIndex < [self.shapes count]) {
127 |         oldSelectionBounds = self.selectedShape.totalBounds;
128 |     }
129 |     _selectedShapeIndex = selectedShapeIndex;
130 |     CGRect newSelectionBounds = self.selectedShape.totalBounds;
131 |     CGRect rectToRedraw = CGRectUnion(oldSelectionBounds, newSelectionBounds);
132 |     [_drawingView setNeedsDisplayInRect:rectToRedraw];
133 |     self.deleteShapeButton.enabled = (_selectedShapeIndex != NSNotFound);
134 | }
135 | 
136 | - (Shape *)selectedShape
137 | {
138 |     if (_selectedShapeIndex == NSNotFound) {
139 |         return nil;
140 |     }
141 |     return [self.shapes objectAtIndex:_selectedShapeIndex];
142 | }
143 | 
144 | 
145 | #pragma mark - Hit Testing
146 | 
147 | - (NSUInteger)hitTest:(CGPoint)point
148 | {
149 |     __block NSUInteger hitShapeIndex = NSNotFound;
150 |     [self.shapes enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id shape, NSUInteger idx, BOOL *stop) {
151 |         if ([shape containsPoint:point]) {
152 |             hitShapeIndex = idx;
153 |             *stop = YES;
154 |         }
155 |     }];
156 |     return hitShapeIndex;
157 | }
158 | 
159 | 
160 | #pragma mark - Touch handling
161 | 
162 | - (void)tapDetected:(UITapGestureRecognizer *)tapRecognizer
163 | {
164 |     CGPoint tapLocation = [tapRecognizer locationInView:self.drawingView];
165 |     self.selectedShapeIndex = [self hitTest:tapLocation];
166 | }
167 | 
168 | - (void)panDetected:(UIPanGestureRecognizer *)panRecognizer
169 | {
170 |     switch (panRecognizer.state) {
171 |         case UIGestureRecognizerStateBegan: {
172 |             CGPoint tapLocation = [panRecognizer locationInView:self.drawingView];
173 |             self.selectedShapeIndex = [self hitTest:tapLocation];
174 |             break;
175 |         }
176 |         case UIGestureRecognizerStateChanged: {
177 |             CGPoint translation = [panRecognizer translationInView:self.drawingView];
178 |             CGRect originalBounds = self.selectedShape.totalBounds;
179 |             CGRect newBounds = CGRectApplyAffineTransform(originalBounds, CGAffineTransformMakeTranslation(translation.x, translation.y));
180 |             CGRect rectToRedraw = CGRectUnion(originalBounds, newBounds);
181 | 
182 |             [self.selectedShape moveBy:translation];
183 |             [self.drawingView reloadDataInRect:rectToRedraw];
184 |             [panRecognizer setTranslation:CGPointZero inView:self.drawingView];
185 |         }
186 |         default:
187 |             break;
188 |     }
189 | }
190 | 
191 | 
192 | #pragma mark - DrawingViewDataSource
193 | 
194 | - (NSUInteger)numberOfShapesInDrawingView:(DrawingView *)drawingView
195 | {
196 |     return [self.shapes count];
197 | }
198 | 
199 | - (UIBezierPath *)drawingView:(DrawingView *)drawingView pathForShapeAtIndex:(NSUInteger)shapeIndex
200 | {
201 |     Shape *shape = [self.shapes objectAtIndex:shapeIndex];
202 |     return shape.path;
203 | }
204 | 
205 | - (UIColor *)drawingView:(DrawingView *)drawingView lineColorForShapeAtIndex:(NSUInteger)shapeIndex
206 | {
207 |     Shape *shape = [self.shapes objectAtIndex:shapeIndex];
208 |     return shape.lineColor;
209 | }
210 | 
211 | - (NSUInteger)indexOfSelectedShapeInDrawingView:(DrawingView *)drawingView
212 | {
213 |     return self.selectedShapeIndex;
214 | }
215 | 
216 | @end


--------------------------------------------------------------------------------
/PathHitTesting/en.lproj/InfoPlist.strings:
--------------------------------------------------------------------------------
1 | /* Localized versions of Info.plist keys */
2 | 
3 | 


--------------------------------------------------------------------------------
/PathHitTesting/en.lproj/MainStoryboard.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="1.0" toolsVersion="1938" systemVersion="11C62" targetRuntime="iOS.CocoaTouch.iPad" propertyAccessControl="none" initialViewController="2">
 3 |     <dependencies>
 4 |         <development defaultVersion="4200" identifier="xcode"/>
 5 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="933"/>
 6 |     </dependencies>
 7 |     <scenes>
 8 |         <scene sceneID="4">
 9 |             <objects>
10 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="3" sceneMemberID="firstResponder"/>
11 |                 <viewController id="2" customClass="ViewController" sceneMemberID="viewController">
12 |                     <view key="view" contentMode="scaleToFill" id="5">
13 |                         <rect key="frame" x="0.0" y="20" width="768" height="1004"/>
14 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
15 |                         <subviews>
16 |                             <view contentMode="scaleToFill" id="8XG-JP-5mD" customClass="DrawingView">
17 |                                 <rect key="frame" x="0.0" y="44" width="768" height="960"/>
18 |                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
19 |                                 <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                                 <connections>
21 |                                     <outlet property="dataSource" destination="2" id="h2x-Pg-OzM"/>
22 |                                 </connections>
23 |                             </view>
24 |                             <navigationBar contentMode="scaleToFill" id="Gb6-hP-emF">
25 |                                 <rect key="frame" x="0.0" y="0.0" width="768" height="44"/>
26 |                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMaxY="YES"/>
27 |                                 <items>
28 |                                     <navigationItem title="Tap or Drag Shapes" id="uxq-FD-Lvn">
29 |                                         <barButtonItem key="leftBarButtonItem" title="Add Random Shape" id="19p-3n-dPH">
30 |                                             <connections>
31 |                                                 <action selector="addButtonTapped:" destination="2" id="e3d-JM-kd1"/>
32 |                                             </connections>
33 |                                         </barButtonItem>
34 |                                         <barButtonItem key="rightBarButtonItem" enabled="NO" title="Delete Selected Shape" id="UA9-66-vii">
35 |                                             <connections>
36 |                                                 <action selector="deleteButtonTapped:" destination="2" id="T4i-xg-cbo"/>
37 |                                             </connections>
38 |                                         </barButtonItem>
39 |                                     </navigationItem>
40 |                                 </items>
41 |                             </navigationBar>
42 |                         </subviews>
43 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
44 |                     </view>
45 |                     <connections>
46 |                         <outlet property="deleteShapeButton" destination="UA9-66-vii" id="8fk-CG-KrI"/>
47 |                         <outlet property="drawingView" destination="8XG-JP-5mD" id="z9f-Yl-EaZ"/>
48 |                     </connections>
49 |                 </viewController>
50 |             </objects>
51 |         </scene>
52 |     </scenes>
53 |     <classes>
54 |         <class className="DrawingView" superclassName="UIView">
55 |             <source key="sourceIdentifier" type="project" relativePath="./Classes/DrawingView.h"/>
56 |             <relationships>
57 |                 <relationship kind="outlet" name="dataSource"/>
58 |             </relationships>
59 |         </class>
60 |         <class className="ViewController" superclassName="UIViewController">
61 |             <source key="sourceIdentifier" type="project" relativePath="./Classes/ViewController.h"/>
62 |             <relationships>
63 |                 <relationship kind="action" name="addButtonTapped:"/>
64 |                 <relationship kind="action" name="deleteButtonTapped:"/>
65 |                 <relationship kind="outlet" name="deleteShapeButton" candidateClass="UIBarButtonItem"/>
66 |                 <relationship kind="outlet" name="drawingView" candidateClass="DrawingView"/>
67 |             </relationships>
68 |         </class>
69 |     </classes>
70 |     <simulatedMetricsContainer key="defaultSimulatedMetrics">
71 |         <simulatedStatusBarMetrics key="statusBar" statusBarStyle="blackTranslucent"/>
72 |         <simulatedOrientationMetrics key="orientation"/>
73 |         <simulatedScreenMetrics key="destination"/>
74 |     </simulatedMetricsContainer>
75 | </document>


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/PathHitTesting/main.m:
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 1 | //
 2 | //  main.m
 3 | //  PathHitTesting
 4 | //
 5 | //  Created by Ole Begemann on 30.01.12.
 6 | //  Copyright (c) 2012 Ole Begemann. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | #import "AppDelegate.h"
12 | 
13 | int main(int argc, char *argv[])
14 | {
15 |     @autoreleasepool {
16 |         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
17 |     }
18 | }
19 | 


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/README.markdown:
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1 | This is a demo iOS app I developed to illustrate [a blog post on hit testing](http://oleb.net/blog/2012/02/cgpath-hit-testing/) with the `CGPathCreateCopyByStrokingPath()` function. Please see the article on my blog for more info.


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