├── Demo ├── SquaresLoading │ ├── en.lproj │ │ └── InfoPlist.strings │ ├── DemoViewController.h │ ├── AppDelegate.h │ ├── main.m │ ├── SquaresLoading-Prefix.pch │ ├── Images.xcassets │ │ ├── AppIcon.appiconset │ │ │ └── Contents.json │ │ └── LaunchImage.launchimage │ │ │ └── Contents.json │ ├── SquaresLoading-Info.plist │ ├── AppDelegate.m │ └── DemoViewController.m ├── SquaresLoadingTests │ ├── en.lproj │ │ └── InfoPlist.strings │ ├── SquaresLoadingTests-Info.plist │ └── SquaresLoadingTests.m └── SquaresLoading.xcodeproj │ ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── SquaresLoading.xccheckout │ └── project.pbxproj ├── SquaresLoading.gif ├── .gitignore ├── RZSquaresLoading ├── RZSquaresLoading.h └── RZSquaresLoading.m ├── RZSquaresLoading.podspec ├── README.md └── LICENSE /Demo/SquaresLoading/en.lproj/InfoPlist.strings: -------------------------------------------------------------------------------- 1 | /* Localized versions of Info.plist keys */ 2 | 3 | -------------------------------------------------------------------------------- /SquaresLoading.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/robinzhangx/RZSquaresLoading/HEAD/SquaresLoading.gif -------------------------------------------------------------------------------- /Demo/SquaresLoadingTests/en.lproj/InfoPlist.strings: -------------------------------------------------------------------------------- 1 | /* Localized versions of Info.plist keys */ 2 | 3 | -------------------------------------------------------------------------------- /Demo/SquaresLoading.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | .DS_Store 3 | */build/* 4 | *.pbxuser 5 | !default.pbxuser 6 | *.mode1v3 7 | !default.mode1v3 8 | *.mode2v3 9 | !default.mode2v3 10 | *.perspectivev3 11 | !default.perspectivev3 12 | xcuserdata 13 | profile 14 | *.moved-aside 15 | DerivedData 16 | .idea/ 17 | *.hmap 18 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/DemoViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // DemoViewController.h 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface DemoViewController : UIViewController 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /RZSquaresLoading/RZSquaresLoading.h: -------------------------------------------------------------------------------- 1 | // 2 | // RZSquaresLoading.h 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface RZSquaresLoading : UIView 12 | 13 | @property (nonatomic) UIColor *color; 14 | 15 | @end 16 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/AppDelegate.h: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.h 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface AppDelegate : UIResponder 12 | 13 | @property (strong, nonatomic) UIWindow *window; 14 | 15 | @end 16 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import 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 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/SquaresLoading-Prefix.pch: -------------------------------------------------------------------------------- 1 | // 2 | // Prefix header 3 | // 4 | // The contents of this file are implicitly included at the beginning of every source file. 5 | // 6 | 7 | #import 8 | 9 | #ifndef __IPHONE_3_0 10 | #warning "This project uses features only available in iOS SDK 3.0 and later." 11 | #endif 12 | 13 | #ifdef __OBJC__ 14 | #import 15 | #import 16 | #endif 17 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/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" : "40x40", 11 | "scale" : "2x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "60x60", 16 | "scale" : "2x" 17 | } 18 | ], 19 | "info" : { 20 | "version" : 1, 21 | "author" : "xcode" 22 | } 23 | } -------------------------------------------------------------------------------- /Demo/SquaresLoading/Images.xcassets/LaunchImage.launchimage/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "orientation" : "portrait", 5 | "idiom" : "iphone", 6 | "extent" : "full-screen", 7 | "minimum-system-version" : "7.0", 8 | "scale" : "2x" 9 | }, 10 | { 11 | "orientation" : "portrait", 12 | "idiom" : "iphone", 13 | "subtype" : "retina4", 14 | "extent" : "full-screen", 15 | "minimum-system-version" : "7.0", 16 | "scale" : "2x" 17 | } 18 | ], 19 | "info" : { 20 | "version" : 1, 21 | "author" : "xcode" 22 | } 23 | } -------------------------------------------------------------------------------- /RZSquaresLoading.podspec: -------------------------------------------------------------------------------- 1 | Pod::Spec.new do |s| 2 | s.name = "RZSquaresLoading" 3 | s.version = "1.1" 4 | s.summary = "iOS loading animations with squares." 5 | s.homepage = "https://github.com/robinzhangx/RZSquaresLoading" 6 | s.license = { :type => 'MIT', :file => 'LICENSE' } 7 | s.authors = { "robinz" => "robin.zhangx@gmail.com" } 8 | s.platform = :ios, '6.0' 9 | s.source = { :git => "https://github.com/robinzhangx/RZSquaresLoading.git", :tag => "1.1" } 10 | s.source_files = 'RZSquaresLoading/RZSquaresLoading.{h,m}' 11 | s.requires_arc = true 12 | end 13 | -------------------------------------------------------------------------------- /Demo/SquaresLoadingTests/SquaresLoadingTests-Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | ${EXECUTABLE_NAME} 9 | CFBundleIdentifier 10 | com.example.${PRODUCT_NAME:rfc1034identifier} 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundlePackageType 14 | BNDL 15 | CFBundleShortVersionString 16 | 1.0 17 | CFBundleSignature 18 | ???? 19 | CFBundleVersion 20 | 1 21 | 22 | 23 | -------------------------------------------------------------------------------- /Demo/SquaresLoadingTests/SquaresLoadingTests.m: -------------------------------------------------------------------------------- 1 | // 2 | // SquaresLoadingTests.m 3 | // SquaresLoadingTests 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface SquaresLoadingTests : XCTestCase 12 | 13 | @end 14 | 15 | @implementation SquaresLoadingTests 16 | 17 | - (void)setUp 18 | { 19 | [super setUp]; 20 | // Put setup code here. This method is called before the invocation of each test method in the class. 21 | } 22 | 23 | - (void)tearDown 24 | { 25 | // Put teardown code here. This method is called after the invocation of each test method in the class. 26 | [super tearDown]; 27 | } 28 | 29 | - (void)testExample 30 | { 31 | XCTFail(@"No implementation for \"%s\"", __PRETTY_FUNCTION__); 32 | } 33 | 34 | @end 35 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | RZSquaresLoading 2 | ============== 3 | iOS loading animation with squares. 4 | 5 | ![image](https://raw.github.com/robinzhangx/RZSquaresLoading/master/SquaresLoading.gif) 6 | 7 | Usage 8 | ============== 9 | Instantiate ```RZSquaresLoading```(change the frame size and position to suit your need) and add to your view hierarchy. 10 | ``` 11 | RZSquaresLoading *squareLoading = [[RZSquaresLoading alloc] initWithFrame:CGRectMake((0, 0, 36, 36)]; 12 | [self.view addSubview:squareLoading]; 13 | ``` 14 | 15 | Change color: 16 | ``` 17 | squareLoading.color = [UIColor redColor]; 18 | ``` 19 | 20 | Install 21 | ============== 22 | Install using CocoaPods: 23 | ``` 24 | pod 'RZSquaresLoading' 25 | ``` 26 | 27 | License 28 | ============== 29 | ```RZSquaresLoading``` is available under the MIT license. See the LICENSE file for more info. 30 | 31 | Note 32 | ============== 33 | RZSquaresLoading is also available for Xamarin. See [RZSquaresLoading-Xamarin-iOS](https://github.com/Backelite/RZSquaresLoading-Xamarin-iOS). 34 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2014 Robin Zhang 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy of 6 | this software and associated documentation files (the "Software"), to deal in 7 | the Software without restriction, including without limitation the rights to 8 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 9 | the Software, and to permit persons to whom the Software is furnished to do so, 10 | subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 17 | FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 18 | COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 21 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/SquaresLoading-Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleDisplayName 8 | ${PRODUCT_NAME} 9 | CFBundleExecutable 10 | ${EXECUTABLE_NAME} 11 | CFBundleIdentifier 12 | com.example.${PRODUCT_NAME:rfc1034identifier} 13 | CFBundleInfoDictionaryVersion 14 | 6.0 15 | CFBundleName 16 | ${PRODUCT_NAME} 17 | CFBundlePackageType 18 | APPL 19 | CFBundleShortVersionString 20 | 1.0 21 | CFBundleSignature 22 | ???? 23 | CFBundleVersion 24 | 1.0 25 | LSRequiresIPhoneOS 26 | 27 | UIRequiredDeviceCapabilities 28 | 29 | armv7 30 | 31 | UISupportedInterfaceOrientations 32 | 33 | UIInterfaceOrientationPortrait 34 | UIInterfaceOrientationLandscapeLeft 35 | UIInterfaceOrientationLandscapeRight 36 | 37 | 38 | 39 | -------------------------------------------------------------------------------- /Demo/SquaresLoading.xcodeproj/project.xcworkspace/xcshareddata/SquaresLoading.xccheckout: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDESourceControlProjectFavoriteDictionaryKey 6 | 7 | IDESourceControlProjectIdentifier 8 | 44CB346E-3139-43FD-9902-6B9E9D361B68 9 | IDESourceControlProjectName 10 | SquaresLoading 11 | IDESourceControlProjectOriginsDictionary 12 | 13 | F6CD51F4-23D5-4161-B1D9-4F5E3D6D7857 14 | https://github.com/robinzhangx/RZSquaresLoading.git 15 | 16 | IDESourceControlProjectPath 17 | Demo/SquaresLoading.xcodeproj/project.xcworkspace 18 | IDESourceControlProjectRelativeInstallPathDictionary 19 | 20 | F6CD51F4-23D5-4161-B1D9-4F5E3D6D7857 21 | ../../.. 22 | 23 | IDESourceControlProjectURL 24 | https://github.com/robinzhangx/RZSquaresLoading.git 25 | IDESourceControlProjectVersion 26 | 110 27 | IDESourceControlProjectWCCIdentifier 28 | F6CD51F4-23D5-4161-B1D9-4F5E3D6D7857 29 | IDESourceControlProjectWCConfigurations 30 | 31 | 32 | IDESourceControlRepositoryExtensionIdentifierKey 33 | public.vcs.git 34 | IDESourceControlWCCIdentifierKey 35 | F6CD51F4-23D5-4161-B1D9-4F5E3D6D7857 36 | IDESourceControlWCCName 37 | RZSquaresLoading 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/AppDelegate.m: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.m 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import "AppDelegate.h" 10 | #import "DemoViewController.h" 11 | 12 | @implementation AppDelegate 13 | 14 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 15 | { 16 | self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 17 | // Override point for customization after application launch. 18 | self.window.backgroundColor = [UIColor whiteColor]; 19 | self.window.rootViewController = [[DemoViewController alloc] init]; 20 | [self.window makeKeyAndVisible]; 21 | return YES; 22 | } 23 | 24 | - (void)applicationWillResignActive:(UIApplication *)application 25 | { 26 | // 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. 27 | // 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. 28 | } 29 | 30 | - (void)applicationDidEnterBackground:(UIApplication *)application 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 | - (void)applicationWillEnterForeground:(UIApplication *)application 37 | { 38 | // 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. 39 | } 40 | 41 | - (void)applicationDidBecomeActive:(UIApplication *)application 42 | { 43 | // 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. 44 | } 45 | 46 | - (void)applicationWillTerminate:(UIApplication *)application 47 | { 48 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 49 | } 50 | 51 | @end 52 | -------------------------------------------------------------------------------- /Demo/SquaresLoading/DemoViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // DemoViewController.m 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import "DemoViewController.h" 10 | #import "RZSquaresLoading.h" 11 | 12 | @interface DemoViewController () { 13 | RZSquaresLoading *_square; 14 | UIColor *_red; 15 | UIButton *_redButton; 16 | UIColor *_green; 17 | UIButton *_greenButton; 18 | UIColor *_blue; 19 | UIButton *_blueButton; 20 | UIColor *_orange; 21 | UIButton *_orangeButton; 22 | UIButton *_grayButton; 23 | } 24 | 25 | @end 26 | 27 | @implementation DemoViewController 28 | 29 | - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 30 | { 31 | self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 32 | if (self) { 33 | // Custom initialization 34 | } 35 | return self; 36 | } 37 | 38 | - (void)viewDidLoad 39 | { 40 | [super viewDidLoad]; 41 | // Do any additional setup after loading the view. 42 | 43 | _square = [[RZSquaresLoading alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 36) / 2, 44 | (self.view.frame.size.height - 36) / 2, 45 | 36, 46 | 36)]; 47 | [self.view addSubview:_square]; 48 | 49 | // Color buttons 50 | _red = [[UIColor alloc] initWithRed:1.0 green:65.0/255 blue:54.0/255 alpha:1.0]; 51 | _redButton = [[UIButton alloc] initWithFrame:CGRectMake(40, _square.frame.origin.y + 144, 32, 32)]; 52 | _redButton.backgroundColor = _red; 53 | _redButton.layer.cornerRadius = 3.0; 54 | [_redButton addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside]; 55 | [self.view addSubview:_redButton]; 56 | 57 | _green = [[UIColor alloc] initWithRed:46.0/255 green:204.0/255 blue:64.0/255 alpha:1.0]; 58 | _greenButton = [[UIButton alloc] initWithFrame:CGRectMake(92, _square.frame.origin.y + 144, 32, 32)]; 59 | _greenButton.backgroundColor = _green; 60 | _greenButton.layer.cornerRadius = 3.0; 61 | [_greenButton addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside]; 62 | [self.view addSubview:_greenButton]; 63 | 64 | _blue = [[UIColor alloc] initWithRed:0 green:116.0/255 blue:217.0/255 alpha:1.0]; 65 | _blueButton = [[UIButton alloc] initWithFrame:CGRectMake(144, _square.frame.origin.y + 144, 32, 32)]; 66 | _blueButton.backgroundColor = _blue; 67 | _blueButton.layer.cornerRadius = 3.0; 68 | [_blueButton addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside]; 69 | [self.view addSubview:_blueButton]; 70 | 71 | _orange = [[UIColor alloc] initWithRed:1.0 green:133.0/255 blue:27.0/255 alpha:1.0]; 72 | _orangeButton = [[UIButton alloc] initWithFrame:CGRectMake(196, _square.frame.origin.y + 144, 32, 32)]; 73 | _orangeButton.backgroundColor = _orange; 74 | _orangeButton.layer.cornerRadius = 3.0; 75 | [_orangeButton addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside]; 76 | [self.view addSubview:_orangeButton]; 77 | 78 | _grayButton = [[UIButton alloc] initWithFrame:CGRectMake(248, _square.frame.origin.y + 144, 32, 32)]; 79 | _grayButton.backgroundColor = [UIColor darkGrayColor]; 80 | _grayButton.layer.cornerRadius = 3.0; 81 | [_grayButton addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside]; 82 | [self.view addSubview:_grayButton]; 83 | } 84 | 85 | - (void)didReceiveMemoryWarning 86 | { 87 | [super didReceiveMemoryWarning]; 88 | // Dispose of any resources that can be recreated. 89 | } 90 | 91 | - (IBAction)changeColor:(id)sender 92 | { 93 | if (sender == _redButton) 94 | _square.color = _red; 95 | else if (sender == _greenButton) 96 | _square.color = _green; 97 | else if (sender == _blueButton) 98 | _square.color = _blue; 99 | else if (sender == _orangeButton) 100 | _square.color = _orange; 101 | else if (sender == _grayButton) 102 | _square.color = [UIColor darkGrayColor]; 103 | } 104 | 105 | @end 106 | -------------------------------------------------------------------------------- /RZSquaresLoading/RZSquaresLoading.m: -------------------------------------------------------------------------------- 1 | // 2 | // RZSquaresLoading.m 3 | // SquaresLoading 4 | // 5 | // Created by robin on 1/29/14. 6 | // Copyright (c) 2014 SquaresLoading. All rights reserved. 7 | // 8 | 9 | #import "RZSquaresLoading.h" 10 | 11 | @implementation RZSquaresLoading { 12 | float _squareSize; 13 | float _gapSize; 14 | float _moveTime; 15 | float _squareStartX; 16 | float _squareStartY; 17 | float _squareStartOpacity; 18 | float _squareEndX; 19 | float _squareEndY; 20 | float _squareEndOpacity; 21 | float _squareOffsetX[9]; 22 | float _squareOffsetY[9]; 23 | float _squareOpacity[9]; 24 | NSMutableArray *_squares; 25 | } 26 | 27 | - (id)initWithFrame:(CGRect)frame 28 | { 29 | self = [super initWithFrame:frame]; 30 | if (self) { 31 | [self commonSetup:MIN(frame.size.width, frame.size.height)]; 32 | } 33 | return self; 34 | } 35 | 36 | - (id)initWithCoder:(NSCoder *)coder 37 | { 38 | self = [super initWithCoder:coder]; 39 | if (self) { 40 | [self commonSetup:MIN(CGRectGetWidth(self.frame), CGRectGetHeight(self.frame))]; 41 | } 42 | return self; 43 | } 44 | 45 | - (void)setColor:(UIColor *)color 46 | { 47 | _color = color; 48 | for (CALayer *layer in _squares) { 49 | layer.backgroundColor = color.CGColor; 50 | } 51 | } 52 | 53 | - (void)commonSetup:(float)size 54 | { 55 | float gap = 0.04; 56 | _gapSize = size * gap; 57 | _squareSize = size * (1.0 - 2 * gap) / 3; 58 | _moveTime = 0.15; 59 | _squares = [[NSMutableArray alloc] init]; 60 | 61 | for (int i = 0; i < 3; i++) { 62 | for (int j = 0; j < 3; j++) { 63 | float offsetX, offsetY; 64 | int idx = 3 * i + j; 65 | if (i == 1) { 66 | offsetX = _squareSize * (2 - j) + _gapSize * (2 - j); 67 | offsetY = _squareSize * i + _gapSize * i; 68 | } else { 69 | offsetX = _squareSize * j + _gapSize * j; 70 | offsetY = _squareSize * i + _gapSize * i; 71 | } 72 | _squareOffsetX[idx] = offsetX; 73 | _squareOffsetY[idx] = offsetY; 74 | _squareOpacity[idx] = 0.1 * (idx + 1); 75 | } 76 | } 77 | _squareStartX = _squareOffsetX[0]; 78 | _squareStartY = _squareOffsetY[0] - 2 * _squareSize - 2 * _gapSize; 79 | _squareStartOpacity = 0.0; 80 | _squareEndX = _squareOffsetX[8]; 81 | _squareEndY = _squareOffsetY[8] + 2 * _squareSize + 2 * _gapSize; 82 | _squareEndOpacity = 0.0; 83 | 84 | if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) 85 | _color = [UIColor blackColor]; 86 | else 87 | _color = self.tintColor; 88 | 89 | for (int i = -1; i < 9; i++) { 90 | [self addSquareAnimation:i]; 91 | } 92 | } 93 | 94 | - (void)addSquareAnimation:(int)position 95 | { 96 | 97 | CALayer *square = [CALayer layer]; 98 | if (position == -1) { 99 | square.frame = CGRectMake(_squareStartX, _squareStartY, _squareSize, _squareSize); 100 | square.opacity = _squareStartOpacity; 101 | } else { 102 | square.frame = CGRectMake(_squareOffsetX[position], _squareOffsetY[position], _squareSize, _squareSize); 103 | square.opacity = _squareOpacity[position]; 104 | } 105 | square.backgroundColor = self.color.CGColor; 106 | [_squares addObject:square]; 107 | [self.layer addSublayer:square]; 108 | 109 | NSMutableArray *keyTimes = [[NSMutableArray alloc] init]; 110 | NSMutableArray *alphas = [[NSMutableArray alloc] init]; 111 | [keyTimes addObject:@(0.0)]; 112 | if (position == -1) { 113 | [alphas addObject:@(0.0)]; 114 | } else { 115 | [alphas addObject:@(_squareOpacity[position])]; 116 | } 117 | if (position == 0) 118 | square.opacity = 0.0; 119 | 120 | CGPoint sp = square.position; 121 | CGMutablePathRef path = CGPathCreateMutable(); 122 | CGPathMoveToPoint(path, NULL, sp.x, sp.y); 123 | 124 | float x, y, a; 125 | if (position == -1) { 126 | x = _squareOffsetX[0] - _squareStartX; 127 | y = _squareOffsetY[0] - _squareStartY; 128 | a = _squareOpacity[0]; 129 | } else if (position == 8) { 130 | x = _squareEndX - _squareOffsetX[position]; 131 | y = _squareEndY - _squareOffsetY[position]; 132 | a = _squareEndOpacity; 133 | } else { 134 | x = _squareOffsetX[position + 1] - _squareOffsetX[position]; 135 | y = _squareOffsetY[position + 1] - _squareOffsetY[position]; 136 | a = _squareOpacity[position + 1]; 137 | } 138 | CGPathAddLineToPoint(path, NULL, sp.x + x, sp.y + y); 139 | [keyTimes addObject:@(1.0 / 8.0)]; 140 | [alphas addObject:@(a)]; 141 | 142 | CGPathAddLineToPoint(path, NULL, sp.x + x, sp.y + y); 143 | [keyTimes addObject:@(1.0)]; 144 | [alphas addObject:@(a)]; 145 | 146 | CAKeyframeAnimation *posAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"]; 147 | posAnim.removedOnCompletion = NO; 148 | posAnim.duration = _moveTime * 8; 149 | posAnim.path = path; 150 | posAnim.keyTimes = keyTimes; 151 | 152 | CAKeyframeAnimation *alphaAnim = [CAKeyframeAnimation animationWithKeyPath:@"opacity"]; 153 | alphaAnim.removedOnCompletion = NO; 154 | alphaAnim.duration = _moveTime * 8; 155 | alphaAnim.values = alphas; 156 | alphaAnim.keyTimes = keyTimes; 157 | 158 | CAKeyframeAnimation *blankAnim = [CAKeyframeAnimation animationWithKeyPath:@"opacity"]; 159 | blankAnim.removedOnCompletion = NO; 160 | blankAnim.beginTime = _moveTime * 8; 161 | blankAnim.duration = _moveTime; 162 | blankAnim.values = @[@(0.0), @(0.0)]; 163 | blankAnim.keyTimes = @[@(0.0), @(1.0)]; 164 | 165 | float beginTime; 166 | if (position == -1) 167 | beginTime = 0; 168 | else 169 | beginTime = _moveTime * (8 - position); 170 | CAAnimationGroup *group = [CAAnimationGroup animation]; 171 | group.animations = @[posAnim, alphaAnim, blankAnim]; 172 | group.beginTime = CACurrentMediaTime() + beginTime; 173 | group.repeatCount = HUGE_VALF; 174 | group.removedOnCompletion = NO; 175 | group.delegate = self; 176 | group.duration = 9 * _moveTime; 177 | 178 | [square addAnimation:group forKey:[NSString stringWithFormat:@"square-%d", position]]; 179 | } 180 | 181 | @end 182 | -------------------------------------------------------------------------------- /Demo/SquaresLoading.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 4 | classes = { 5 | }; 6 | objectVersion = 46; 7 | objects = { 8 | 9 | /* Begin PBXBuildFile section */ 10 | 001DCC281898A40B004AEC43 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 001DCC271898A40B004AEC43 /* Foundation.framework */; }; 11 | 001DCC2A1898A40B004AEC43 /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; 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