├── .gitignore ├── .idea ├── .name ├── FDRotationGestureRecognizer.iml ├── encodings.xml ├── modules.xml ├── scopes │ └── scope_settings.xml ├── vcs.xml ├── workspace.xml └── xcode.xml ├── FDRotationGestureRecognizer.podspec ├── FDRotationGestureRecognizer.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ └── contents.xcworkspacedata └── xcuserdata │ └── frank.xcuserdatad │ └── xcschemes │ ├── All in FDRotationGestureRecognizerTests.m.xcscheme │ ├── FDRotationGestureRecognizer.xcscheme │ └── xcschememanagement.plist ├── FDRotationGestureRecognizer ├── AppDelegate.h ├── AppDelegate.m ├── Base.lproj │ ├── LaunchScreen.xib │ └── Main.storyboard ├── FDRotationGestureRecognizer │ ├── FDRotationGestureRecognizer.h │ └── FDRotationGestureRecognizer.m ├── Images.xcassets │ └── AppIcon.appiconset │ │ └── Contents.json ├── Info.plist ├── ViewController.h ├── ViewController.m └── main.m ├── FDRotationGestureRecognizerTests ├── FDRotationGestureRecognizerTests.m └── Info.plist ├── LICENSE ├── Other ├── demo.gif ├── demo.mov ├── explanation.png └── myfert.jpeg └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | ignored/ -------------------------------------------------------------------------------- /.idea/.name: -------------------------------------------------------------------------------- 1 | FDRotationGestureRecognizer -------------------------------------------------------------------------------- /.idea/FDRotationGestureRecognizer.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /.idea/scopes/scope_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 5 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/workspace.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 14 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 31 | 32 | 44 | 45 | 46 | true 47 | 48 | 49 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 84 | 85 | 88 | 89 | 92 | 93 | 94 | 95 | 98 | 99 | 102 | 103 | 106 | 107 | 108 | 109 | 112 | 113 | 116 | 117 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 1434906699068 179 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | 214 | 217 | 218 | 219 | 221 | 222 | 225 | 226 | 227 | 228 | 230 | 231 | 232 | 233 | 234 | 235 | 236 | 237 | 238 | 239 | 240 | 241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 | 261 | 262 | 263 | 264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 | 272 | 273 | 274 | 275 | 276 | 277 | 278 | 279 | 280 | 281 | 282 | 283 | 284 | 285 | 286 | 287 | 288 | 289 | 290 | 291 | 292 | -------------------------------------------------------------------------------- /.idea/xcode.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.podspec: -------------------------------------------------------------------------------- 1 | Pod::Spec.new do |s| 2 | 3 | s.name = "FDRotationGestureRecognizer" 4 | s.version = "0.0.1" 5 | s.summary = "A gesture recognizer for rotations" 6 | 7 | s.description = <<-DESC 8 | A UIGestureRecognizer subclass that, once added to a view, allows to easily measure the rotation performed by the user dragging on the screen. 9 | DESC 10 | 11 | s.homepage = "https://github.com/frankdilo/FDRotationGestureRecognizer" 12 | s.screenshots = "https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/master/Other/demo.gif", "https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/master/Other/explanation.png", "https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/master/Other/myfert.jpeg" 13 | 14 | s.platform = :ios, '8.0' 15 | 16 | s.license = "MIT" 17 | 18 | s.author = { "Francesco Di Lorenzo" => "francescodilorenzo@me.com" } 19 | s.social_media_url = "http://twitter.com/frankdilo" 20 | 21 | s.source = { :git => "https://github.com/frankdilo/FDRotationGestureRecognizer.git", :tag => "0.0.1" } 22 | 23 | s.source_files = "Classes", "FDRotationGestureRecognizer/FDRotationGestureRecognizer/*.{h,m}" 24 | 25 | s.frameworks = 'UIKit' 26 | 27 | end 28 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // 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defaultConfigurationIsVisible = 0; 437 | defaultConfigurationName = Release; 438 | }; 439 | 01DCBE1A1B37214B00EC7B02 /* Build configuration list for PBXNativeTarget "FDRotationGestureRecognizerTests" */ = { 440 | isa = XCConfigurationList; 441 | buildConfigurations = ( 442 | 01DCBE1B1B37214B00EC7B02 /* Debug */, 443 | 01DCBE1C1B37214B00EC7B02 /* Release */, 444 | ); 445 | defaultConfigurationIsVisible = 0; 446 | defaultConfigurationName = Release; 447 | }; 448 | /* End XCConfigurationList section */ 449 | }; 450 | rootObject = 01DCBDEC1B37214A00EC7B02 /* Project object */; 451 | } 452 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.xcodeproj/xcuserdata/frank.xcuserdatad/xcschemes/All in FDRotationGestureRecognizerTests.m.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 6 | 9 | 15 | 16 | 17 | 18 | 19 | 21 | 22 | 23 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 37 | 38 | 39 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.xcodeproj/xcuserdata/frank.xcuserdatad/xcschemes/FDRotationGestureRecognizer.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 29 | 35 | 36 | 37 | 38 | 39 | 44 | 45 | 47 | 53 | 54 | 55 | 56 | 57 | 63 | 64 | 65 | 66 | 75 | 77 | 83 | 84 | 85 | 86 | 87 | 88 | 94 | 96 | 102 | 103 | 104 | 105 | 107 | 108 | 111 | 112 | 113 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer.xcodeproj/xcuserdata/frank.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | FDRotationGestureRecognizer.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | 01DCBDF31B37214A00EC7B02 16 | 17 | primary 18 | 19 | 20 | 01DCBE0C1B37214B00EC7B02 21 | 22 | primary 23 | 24 | 25 | 26 | 27 | 28 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/AppDelegate.h: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.h 3 | // FDRotationGestureRecognizer 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface AppDelegate : UIResponder 12 | 13 | @property (strong, nonatomic) UIWindow *window; 14 | 15 | 16 | @end 17 | 18 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/AppDelegate.m: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.m 3 | // FDRotationGestureRecognizer 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import "AppDelegate.h" 10 | 11 | @interface AppDelegate () 12 | 13 | @end 14 | 15 | @implementation AppDelegate 16 | 17 | 18 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 19 | // Override point for customization after application launch. 20 | return YES; 21 | } 22 | 23 | - (void)applicationWillResignActive:(UIApplication *)application { 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 | - (void)applicationDidEnterBackground:(UIApplication *)application { 29 | // 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. 30 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 31 | } 32 | 33 | - (void)applicationWillEnterForeground:(UIApplication *)application { 34 | // 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. 35 | } 36 | 37 | - (void)applicationDidBecomeActive:(UIApplication *)application { 38 | // 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. 39 | } 40 | 41 | - (void)applicationWillTerminate:(UIApplication *)application { 42 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 43 | } 44 | 45 | @end 46 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/Base.lproj/LaunchScreen.xib: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 20 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/FDRotationGestureRecognizer/FDRotationGestureRecognizer.h: -------------------------------------------------------------------------------- 1 | // 2 | // FDRotationGestureRecognizer.h 3 | // 4 | // Created by Francesco Di Lorenzo on 18/02/14. 5 | // 6 | 7 | #import 8 | 9 | @interface FDRotationGestureRecognizer : UIGestureRecognizer 10 | 11 | /** 12 | * Instantiate a gesture recognizer with the given center. When the interaction starts and the user starts dragging 13 | * on the view, the rotation is calculated relatively to the center. 14 | */ 15 | - (instancetype)initWithCenter:(CGPoint)center; 16 | 17 | /** 18 | * The current rotation. 19 | */ 20 | - (CGFloat)rotation; 21 | 22 | 23 | /** 24 | * Reset the rotation back to zero. 25 | */ 26 | - (void)resetRotation; 27 | 28 | @end 29 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/FDRotationGestureRecognizer/FDRotationGestureRecognizer.m: -------------------------------------------------------------------------------- 1 | // 2 | // FDRotationGestureRecognizer.m 3 | // 4 | // Created by Francesco Di Lorenzo on 18/02/14. 5 | // Copyright (c) 2014 Francesco Di Lorenzo. All rights reserved. 6 | // 7 | 8 | #import "FDRotationGestureRecognizer.h" 9 | #import 10 | 11 | @interface FDRotationGestureRecognizer () 12 | 13 | @property (nonatomic) CGFloat currentRotation; 14 | @property(nonatomic) CGPoint startingPoint; 15 | @property(nonatomic) CGPoint endPoint; 16 | @property(nonatomic) CGPoint center; 17 | @property(nonatomic) CGFloat previousRotation; 18 | 19 | @end 20 | 21 | @implementation FDRotationGestureRecognizer 22 | 23 | - (id) initWithCenter:(CGPoint)center 24 | { 25 | self = [super init]; 26 | if (self) { 27 | self.center = center; 28 | self.currentRotation = 0; 29 | self.previousRotation = 0; 30 | self.startingPoint = CGPointZero; 31 | self.endPoint = CGPointZero; 32 | } 33 | return self; 34 | } 35 | 36 | - (CGFloat)rotation { 37 | return self.currentRotation + self.previousRotation; 38 | } 39 | 40 | - (void)resetRotation { 41 | self.currentRotation = 0; 42 | self.previousRotation = 0; 43 | } 44 | 45 | 46 | // Mirror of the touch-delivery methods on UIResponder 47 | // UIGestureRecognizers aren't in the responder chain, but observe touches hit-tested to their view and their view's subviews 48 | // UIGestureRecognizers receive touches before the view to which the touch was hit-tested 49 | - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 50 | { 51 | [super touchesBegan:touches withEvent:event]; 52 | 53 | self.startingPoint = [[touches anyObject] locationInView:self.view]; 54 | self.state = UIGestureRecognizerStateBegan; 55 | } 56 | 57 | - (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 58 | { 59 | [super touchesMoved:touches withEvent:event]; 60 | 61 | CGPoint point = [[touches anyObject] locationInView:self.view]; 62 | self.currentRotation = [self angleBetweenPoint:self.startingPoint andPoint:point]; 63 | self.state = UIGestureRecognizerStateChanged; 64 | } 65 | 66 | - (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 67 | { 68 | [super touchesEnded:touches withEvent:event]; 69 | 70 | self.endPoint = [[touches anyObject] locationInView:self.view]; 71 | self.currentRotation = [self angleBetweenPoint:self.startingPoint andPoint:self.endPoint]; 72 | self.state = UIGestureRecognizerStateEnded; 73 | } 74 | 75 | - (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event 76 | { 77 | [super touchesCancelled:touches withEvent:event]; 78 | self.state = UIGestureRecognizerStateCancelled; 79 | } 80 | 81 | /** 82 | * Called automatically by the runtime after the gesture state has been set to UIGestureRecognizerStateEnded 83 | * any internal state should be reset to prepare for a new attempt to recognize the gesture after this is received all 84 | * remaining active touches will be ignored (no further updates will be received for touches that had already begun but 85 | * haven't ended) 86 | */ 87 | - (void)reset 88 | { 89 | [super reset]; 90 | _previousRotation = [self rotation]; 91 | _currentRotation = 0; 92 | } 93 | 94 | #define rad_to_degree(x) (180*x)/M_PI 95 | 96 | - (CGFloat)angleBetweenPoint:(CGPoint)first andPoint:(CGPoint)second { 97 | CGPoint centeredPoint1 = CGPointMake(first.x - _center.x, first.y - _center.y); 98 | CGPoint centeredPoint2 = CGPointMake(second.x - _center.x, second.y - _center.y); 99 | 100 | CGFloat firstAngle = angleBetweenOriginAndPoint(centeredPoint1); 101 | CGFloat secondAngle = angleBetweenOriginAndPoint(centeredPoint2); 102 | 103 | CGFloat rads = secondAngle - firstAngle; 104 | 105 | return rads; 106 | } 107 | 108 | CGFloat angleBetweenOriginAndPoint(CGPoint p) { 109 | if (p.x == 0) { 110 | return sign(p.y) * M_PI; 111 | } 112 | 113 | 114 | CGFloat angle = atan(-p.y / p.x); // '-' because negative ordinates are positive in UIKit 115 | 116 | // atan() is defined in [-pi/2, pi/2], but we want a value in [0, 2*pi] 117 | // so we deal with these special cases accordingly 118 | switch (quadrantForPoint(p)) { 119 | case 1: 120 | case 2: angle += M_PI; break; 121 | case 3: angle += 2* M_PI; break; 122 | } 123 | 124 | return angle; 125 | } 126 | 127 | /** 128 | * Return the quadrants the given points belong to 129 | */ 130 | NSInteger quadrantForPoint(CGPoint p) { 131 | if (p.x > 0 && p.y < 0) { 132 | return 0; 133 | } else if (p.x < 0 && p.y < 0) { 134 | return 1; 135 | } else if (p.x < 0 && p.y > 0) { 136 | return 2; 137 | } else if (p.x > 0 && p.y > 0) { 138 | return 3; 139 | } 140 | 141 | return 0; 142 | } 143 | 144 | NSInteger sign(CGFloat num) { 145 | if (num == 0) { 146 | return 0; 147 | } else if (num > 0) { 148 | return 1; 149 | } else { 150 | return -1; 151 | } 152 | } 153 | 154 | - (NSString *)description { 155 | NSMutableString *desc = [NSMutableString string]; 156 | [desc appendFormat:@"\nangle: %f\n", self.currentRotation *180 / M_PI]; 157 | return desc; 158 | } 159 | 160 | @end 161 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/Images.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "29x29", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "29x29", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "40x40", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "40x40", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "60x60", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "60x60", 31 | "scale" : "3x" 32 | }, 33 | { 34 | "idiom" : "ipad", 35 | "size" : "29x29", 36 | "scale" : "1x" 37 | }, 38 | { 39 | "idiom" : "ipad", 40 | "size" : "29x29", 41 | "scale" : "2x" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "size" : "40x40", 46 | "scale" : "1x" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "size" : "40x40", 51 | "scale" : "2x" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "size" : "76x76", 56 | "scale" : "1x" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "size" : "76x76", 61 | "scale" : "2x" 62 | } 63 | ], 64 | "info" : { 65 | "version" : 1, 66 | "author" : "xcode" 67 | } 68 | } -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.francescodilorenzo.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationLandscapeLeft 37 | UIInterfaceOrientationLandscapeRight 38 | 39 | UISupportedInterfaceOrientations~ipad 40 | 41 | UIInterfaceOrientationPortrait 42 | UIInterfaceOrientationPortraitUpsideDown 43 | UIInterfaceOrientationLandscapeLeft 44 | UIInterfaceOrientationLandscapeRight 45 | 46 | 47 | 48 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/ViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.h 3 | // FDRotationGestureRecognizer 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @class AngleView; 12 | 13 | @interface ViewController : UIViewController 14 | 15 | @property(nonatomic, strong) UIView *redSquare; 16 | 17 | @end 18 | 19 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/ViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.m 3 | // FDRotationGestureRecognizer 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import "ViewController.h" 10 | #import "FDRotationGestureRecognizer.h" 11 | 12 | @interface ViewController () 13 | 14 | @end 15 | 16 | @implementation ViewController 17 | 18 | - (void)viewDidLoad { 19 | [super viewDidLoad]; 20 | 21 | self.redSquare = [[UIView alloc] initWithFrame:CGRectMake(self.view.center.x-50, self.view.center.y-50, 100, 100)]; 22 | self.redSquare.backgroundColor = [UIColor redColor]; 23 | 24 | [self.view addSubview:self.redSquare]; 25 | 26 | FDRotationGestureRecognizer *gr = [[FDRotationGestureRecognizer alloc] initWithCenter:self.view.center]; 27 | [gr addTarget:self action:@selector(rotationPerformed:)]; 28 | [self.view addGestureRecognizer:gr]; 29 | } 30 | 31 | - (void)rotationPerformed:(FDRotationGestureRecognizer *)gestureRec { 32 | self.redSquare.transform = CGAffineTransformMakeRotation(-[gestureRec rotation]); 33 | } 34 | 35 | 36 | @end 37 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizer/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // FDRotationGestureRecognizer 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import 10 | #import "AppDelegate.h" 11 | 12 | int main(int argc, char * argv[]) { 13 | @autoreleasepool { 14 | return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizerTests/FDRotationGestureRecognizerTests.m: -------------------------------------------------------------------------------- 1 | // 2 | // FDRotationGestureRecognizerTests.m 3 | // FDRotationGestureRecognizerTests 4 | // 5 | // Created by Francesco Di Lorenzo on 21/06/15. 6 | // Copyright (c) 2015 Francesco Di Lorenzo. All rights reserved. 7 | // 8 | 9 | #import 10 | #import 11 | #import "FDRotationGestureRecognizer.h" 12 | 13 | @interface FDRotationGestureRecognizer (Testing) 14 | 15 | - (CGFloat)angleBetweenPoint:(CGPoint)first andPoint:(CGPoint)second; 16 | 17 | @end 18 | 19 | @interface FDRotationGestureRecognizerTests : XCTestCase 20 | 21 | @property FDRotationGestureRecognizer *gr; 22 | 23 | @end 24 | 25 | @implementation FDRotationGestureRecognizerTests 26 | 27 | #define DEGREE_TO_RAD(x) (x * M_PI)/180 28 | 29 | - (void)setUp { 30 | [super setUp]; 31 | 32 | _gr = [[FDRotationGestureRecognizer alloc] initWithCenter:CGPointZero]; 33 | } 34 | 35 | - (void)test0DegreeAngle { 36 | [self testAngle:0]; 37 | } 38 | 39 | - (void)test30DegreeAngle { 40 | [self testAngle:30]; 41 | } 42 | 43 | - (void)test90DegreeAngle { 44 | [self testAngle:90]; 45 | } 46 | 47 | - (void)test120DegreeAngle { 48 | [self testAngle:120]; 49 | } 50 | 51 | - (void)test180DegreeAngle { 52 | [self testAngle:180]; 53 | } 54 | 55 | - (void)test225DegreeAngle { 56 | [self testAngle:225]; 57 | } 58 | 59 | - (void)test270DegreeAngle { 60 | [self testAngle:270]; 61 | } 62 | 63 | - (void)test315DegreeAngle { 64 | [self testAngle:315]; 65 | } 66 | 67 | - (void)testAngle:(double)angle { 68 | CGPoint point1 = CGPointMake(1, 0); 69 | CGPoint point2 = CGPointMake(cos(DEGREE_TO_RAD(angle)), -sin(DEGREE_TO_RAD(angle))); 70 | CGFloat angleBetweenPoints = [self.gr angleBetweenPoint:point1 andPoint:point2]; 71 | XCTAssertEqualWithAccuracy(angleBetweenPoints, DEGREE_TO_RAD(angle), 0.0001); 72 | } 73 | 74 | 75 | @end 76 | -------------------------------------------------------------------------------- /FDRotationGestureRecognizerTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.francescodilorenzo.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2015 Francesco Di Lorenzo 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy 4 | of this software and associated documentation files (the "Software"), to deal 5 | in the Software without restriction, including without limitation the rights 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 | copies of the Software, and to permit persons to whom the Software is 8 | furnished to do so, subject to the following conditions: 9 | 10 | The above copyright notice and this permission notice shall be included in 11 | all copies or substantial portions of the Software. 12 | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 | THE SOFTWARE. 20 | -------------------------------------------------------------------------------- /Other/demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/7b28ac0238a4dfaea4bf18b0b470ce8e79e91d6c/Other/demo.gif -------------------------------------------------------------------------------- /Other/demo.mov: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/7b28ac0238a4dfaea4bf18b0b470ce8e79e91d6c/Other/demo.mov -------------------------------------------------------------------------------- /Other/explanation.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/7b28ac0238a4dfaea4bf18b0b470ce8e79e91d6c/Other/explanation.png -------------------------------------------------------------------------------- /Other/myfert.jpeg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/frankdilo/FDRotationGestureRecognizer/7b28ac0238a4dfaea4bf18b0b470ce8e79e91d6c/Other/myfert.jpeg -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # FDRotationGestureRecognizer 2 | 3 | A `UIGestureRecognizer` subclass that, once added to a view, allows to easily measure the rotation performed by the user dragging on the screen. 4 | 5 | ## Demo 6 | 7 | This is just a little demo built around the gesture recognizer: 8 | 9 | ![](https://github.com/frankdilo/FDRotationGestureRecognizer/raw/master/Other/demo.gif) 10 | 11 | (Video available [here](https://github.com/frankdilo/FDRotationGestureRecognizer/raw/master/Other/demo.mov) if you don't like gifs.) 12 | 13 | ## How it works 14 | 15 | Basically when the user starts the gesture, the initial tap coordinates are recorded and, as the gesture continues, the angle is updated as explained in this image. 16 | 17 | ![](https://github.com/frankdilo/FDRotationGestureRecognizer/raw/master/Other/explanation.png) 18 | 19 | ## Credits 20 | 21 | I created this component while building the [MyFertility app](https://itunes.apple.com/it/app/my-fertility/id862972591?mt=8) to implement the circular day picker. Thanks to [@dzamir](https://twitter.com/dzamir) and Return Service for letting me open source it :) 22 | 23 | ![](https://github.com/frankdilo/FDRotationGestureRecognizer/raw/master/Other/myfert.jpeg) --------------------------------------------------------------------------------