73 lines
3.6 KiB
Objective-C
Executable File
73 lines
3.6 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorRotatingSquaresAnimation.m
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// DGActivityIndicatorExample
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//
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// Created by Danil Gontovnik on 5/23/15.
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// Copyright (c) 2015 Danil Gontovnik. All rights reserved.
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//
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#import "DGActivityIndicatorRotatingSquaresAnimation.h"
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static CGFloat degreesToRadians(CGFloat degrees) { return (degrees) / 180.0 * M_PI; };
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@implementation DGActivityIndicatorRotatingSquaresAnimation
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#pragma mark -
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#pragma mark DGActivityIndicatorAnimation Protocol
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- (void)setupAnimationInLayer:(CALayer *)layer withSize:(CGSize)size tintColor:(UIColor *)tintColor {
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NSTimeInterval beginTime = CACurrentMediaTime();
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CGFloat squareSize = floor(size.width / 4.0f);
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CGFloat oX = (layer.bounds.size.width - size.width) / 2.0f;
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CGFloat oY = (layer.bounds.size.height - size.height) / 2.0f;
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for (int i = 0; i < 2; i++) {
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CALayer *square = [CALayer layer];
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square.frame = CGRectMake(oX, oY, squareSize, squareSize);
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square.anchorPoint = CGPointMake(0.5f, 0.5f);
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square.backgroundColor = tintColor.CGColor;
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square.shouldRasterize = YES;
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square.rasterizationScale = [[UIScreen mainScreen] scale];
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CAKeyframeAnimation *transformAnimation = [self createKeyframeAnimationWithKeyPath:@"transform"];
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transformAnimation.duration = 1.6f;
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transformAnimation.beginTime = beginTime - (i * transformAnimation.duration / 2.0f);
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transformAnimation.repeatCount = HUGE_VALF;
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transformAnimation.keyTimes = @[@(0.0f), @(0.25f), @(0.50f), @(0.75f), @(1.0f)];
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transformAnimation.timingFunctions = @[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
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[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
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[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
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[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
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[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
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CATransform3D t1 = CATransform3DMakeTranslation(size.width - squareSize, 0.0f, 0.0f);
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t1 = CATransform3DRotate(t1, degreesToRadians(-90.0f), 0.0f, 0.0f, 1.0f);
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t1 = CATransform3DScale(t1, 0.5f, 0.5f, 1.0f);
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CATransform3D t2 = CATransform3DMakeTranslation(size.width - squareSize, size.height - squareSize, 0.0f);
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t2 = CATransform3DRotate(t2, degreesToRadians(-180.0f), 0.0f, 0.0f, 1.0f);
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t2 = CATransform3DScale(t2, 1.0, 1.0, 1.0f);
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CATransform3D t3 = CATransform3DMakeTranslation(0.0f, size.height - squareSize, 0.0f);
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t3 = CATransform3DRotate(t3, degreesToRadians(-270.0f), 0.0f, 0.0f, 1.0f);
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t3 = CATransform3DScale(t3, 0.5f, 0.5f, 1.0f);
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CATransform3D t4 = CATransform3DMakeTranslation(0.0f, 0.0f, 0.0f);
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t4 = CATransform3DRotate(t4, degreesToRadians(-360.0f), 0.0f, 0.0f, 1.0f);
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t4 = CATransform3DScale(t4, 1.0, 1.0, 1.0f);
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transformAnimation.values = @[[NSValue valueWithCATransform3D:CATransform3DIdentity],
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[NSValue valueWithCATransform3D:t1],
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[NSValue valueWithCATransform3D:t2],
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[NSValue valueWithCATransform3D:t3],
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[NSValue valueWithCATransform3D:t4]];
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[layer addSublayer:square];
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[square addAnimation:transformAnimation forKey:@"animation"];
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}
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}
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@end
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