47 lines
1.9 KiB
Objective-C
Executable File
47 lines
1.9 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorBallPulseSyncAnimation.m
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// DGActivityIndicatorExample
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//
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// Created by Nguyen Vinh on 7/20/15.
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// Copyright (c) 2015 Danil Gontovnik. All rights reserved.
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//
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#import "DGActivityIndicatorBallPulseSyncAnimation.h"
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@implementation DGActivityIndicatorBallPulseSyncAnimation
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- (void)setupAnimationInLayer:(CALayer *)layer withSize:(CGSize)size tintColor:(UIColor *)tintColor {
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CGFloat duration = 0.6f;
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NSArray *beginTimes = @[@0.07f, @0.14f, @0.21f];
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CGFloat circleSpacing = 2.0f;
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CGFloat circleSize = (size.width - circleSpacing * 2) / 3;
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CGFloat x = (layer.bounds.size.width - size.width) / 2;
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CGFloat y = (layer.bounds.size.height - circleSize) / 2;
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CGFloat deltaY = (size.height / 2 - circleSize / 2) / 2;
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CAMediaTimingFunction *timingFunciton = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
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// Animation
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CAKeyframeAnimation *animation = [self createKeyframeAnimationWithKeyPath:@"transform.translation.y"];
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animation.duration = duration;
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animation.keyTimes = @[@0.0f, @0.33f, @0.66f, @1.0f];
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animation.values = @[@0.0f, @(deltaY), @(-deltaY), @0.0f];
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animation.timingFunctions = @[timingFunciton, timingFunciton, timingFunciton];
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animation.repeatCount = HUGE_VALF;
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// Draw circles
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for (int i = 0; i < 3; i++) {
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CAShapeLayer *circle = [CAShapeLayer layer];
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UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, circleSize, circleSize) cornerRadius:circleSize / 2];
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animation.beginTime = [beginTimes[i] floatValue];
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circle.fillColor = tintColor.CGColor;
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circle.path = circlePath.CGPath;
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[circle addAnimation:animation forKey:@"animation"];
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circle.frame = CGRectMake(x + circleSize * i + circleSpacing * i, y, circleSize, circleSize);
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[layer addSublayer:circle];
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}
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}
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@end
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