62 lines
2.8 KiB
Objective-C
Executable File
62 lines
2.8 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorNineDotsAnimation.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 "DGActivityIndicatorNineDotsAnimation.h"
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@implementation DGActivityIndicatorNineDotsAnimation
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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 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 * 3 - circlePadding * 2) / 2.0f;
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NSArray *timeOffsets = @[@(0.11f), @(0.42f), @(0.0f),
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@(0.65f), @(0.48f), @(0.2f),
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@(0.63f), @(0.95f), @(0.62f)];
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NSArray *durations = @[@(0.72f), @(1.02f), @(1.28f),
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@(1.42f), @(1.45f), @(1.18f),
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@(0.87f), @(1.45f), @(1.06f)];
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for (int i = 0; i < MIN(timeOffsets.count, durations.count); i++) {
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CALayer *circle = [CALayer layer];
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circle.frame = CGRectMake(oX + (circleSize + circlePadding) * (i % 3), oY + (circleSize + circlePadding) * (int)(i / 3), 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.height / 2.0f;
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CAKeyframeAnimation *transformAnimation = [self createKeyframeAnimationWithKeyPath:@"transform"];
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transformAnimation.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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[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.5f, 0.5f, 0.0f)]];
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CAKeyframeAnimation *opacityAnimation = [self createKeyframeAnimationWithKeyPath:@"opacity"];
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opacityAnimation.values = @[@(0.5f), @(1.0f), @(0.5f)];
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CAAnimationGroup *animationGroup = [self createAnimationGroup];;
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animationGroup.beginTime = beginTime;
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animationGroup.repeatCount = HUGE_VALF;
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animationGroup.duration = [durations[i] doubleValue];
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animationGroup.animations = @[transformAnimation, opacityAnimation];
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animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
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animationGroup.timeOffset = [timeOffsets[i] doubleValue];
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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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