59 lines
2.3 KiB
Objective-C
Executable File
59 lines
2.3 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorThreeDotsAnimation.m
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// DGActivityIndicatorExample
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//
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// Created by Nguyen Vinh on 6/15/15.
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// Copyright (c) 2015 Danil Gontovnik. All rights reserved.
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//
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#import "DGActivityIndicatorThreeDotsAnimation.h"
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@implementation DGActivityIndicatorThreeDotsAnimation
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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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NSTimeInterval duration = 0.5f;
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CGFloat circleSize = size.width / 4.0f;
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CGFloat circlePadding = circleSize / 2.0f;
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CGFloat oX = (layer.bounds.size.width - circleSize * 3 - circlePadding * 2) / 2.0f;
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CGFloat oY = (layer.bounds.size.height - circleSize * 1) / 2.0f;
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for (int i = 0; i < 3; i++) {
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CALayer *circle = [CALayer layer];
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circle.frame = CGRectMake(oX + (circleSize + circlePadding) * (i % 3), oY, circleSize, circleSize);
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circle.backgroundColor = tintColor.CGColor;
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circle.anchorPoint = CGPointMake(0.5f, 0.5f);
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circle.opacity = 1.0f;
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circle.cornerRadius = circle.bounds.size.width / 2.0f;
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CAKeyframeAnimation *tranformAnimation = [self createKeyframeAnimationWithKeyPath:@"transform"];
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tranformAnimation.values = @[[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.5f, 0.5f, 0.0f)],
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[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0f, 1.0f, 0.0f)]];
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CAKeyframeAnimation *opacityAnimation = [self createKeyframeAnimationWithKeyPath:@"opacity"];
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opacityAnimation.values = @[@(0.25f), @(1.0f)];
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CAAnimationGroup *animationGroup = [self createAnimationGroup];;
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animationGroup.autoreverses = YES;
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animationGroup.beginTime = beginTime;
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animationGroup.repeatCount = HUGE_VALF;
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animationGroup.duration = duration;
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animationGroup.animations = @[tranformAnimation, opacityAnimation];
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animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
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[layer addSublayer:circle];
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[circle addAnimation:animationGroup forKey:@"animation"];
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}
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}
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@end
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