48 lines
2.3 KiB
Objective-C
Executable File
48 lines
2.3 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorTwoDotsAnimation.m
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// DGActivityIndicatorExample
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//
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// Created by Danil Gontovnik on 5/24/15.
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// Copyright (c) 2015 Danil Gontovnik. All rights reserved.
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//
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#import "DGActivityIndicatorTwoDotsAnimation.h"
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@implementation DGActivityIndicatorTwoDotsAnimation
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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 circleSize = size.width * 0.92f;
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CGFloat oX = (layer.bounds.size.width - size.width) / 2.0f;
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CGFloat oY = (layer.bounds.size.height - circleSize) / 2.0f;
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for (int i = 0; i < 2; i++) {
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CALayer *circle = [CALayer layer];
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CGFloat offset = circleSize / 2.0f * i;
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circle.frame = CGRectMake((offset + size.width - circleSize) * i + oX, oY, circleSize, circleSize);
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circle.cornerRadius = circle.bounds.size.height / 2.0f;
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circle.anchorPoint = CGPointMake(0.5f, 0.5f);
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circle.transform = CATransform3DMakeScale(0.0f, 0.0f, 0.0f);
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circle.backgroundColor = tintColor.CGColor;
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CAKeyframeAnimation *transformAnimation = [self createKeyframeAnimationWithKeyPath:@"transform"];
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transformAnimation.repeatCount = HUGE_VALF;
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transformAnimation.duration = 1.8f;
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transformAnimation.beginTime = beginTime - (transformAnimation.duration / 2.0f * i);
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transformAnimation.keyTimes = @[@(0.0), @(0.5), @(1.0)];
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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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transformAnimation.values = @[[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.0f, 0.0f, 0.0f)],
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[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0f, 1.0f, 0.0f)],
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[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.0f, 0.0f, 0.0f)]];
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[layer addSublayer:circle];
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[circle addAnimation:transformAnimation forKey:@"animation"];
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}
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}
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@end
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