68 lines
2.7 KiB
Objective-C
Executable File
68 lines
2.7 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorBallGridPulseAnimation.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 "DGActivityIndicatorBallGridPulseAnimation.h"
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@implementation DGActivityIndicatorBallGridPulseAnimation
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- (void)setupAnimationInLayer:(CALayer *)layer withSize:(CGSize)size tintColor:(UIColor *)tintColor {
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NSArray *durations = @[@0.72f, @1.02f, @1.28f, @1.42f, @1.45f, @1.18f, @0.87f, @1.45f, @1.06f];
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NSArray *timeOffsets = @[@-0.06f, @0.25f, @-0.17f, @0.48f, @0.31f, @0.03f, @0.46f, @0.78f, @0.45f];
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CAMediaTimingFunction *timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault];
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CGFloat circleSpacing = 2;
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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 - size.height) / 2;
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// Scale animation
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CAKeyframeAnimation *scaleAnimation = [self createKeyframeAnimationWithKeyPath:@"transform.scale"];
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scaleAnimation.keyTimes = @[@0.0f, @0.5f, @1.0f];
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scaleAnimation.values = @[@1.0f, @0.5f, @1.0f];
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scaleAnimation.timingFunctions = @[timingFunction, timingFunction];
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// Animation
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CAKeyframeAnimation *opacityAnimation = [self createKeyframeAnimationWithKeyPath:@"opacity"];
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opacityAnimation.keyTimes = @[@0.0f, @0.5f, @1.0f];
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opacityAnimation.values = @[@1.0f, @0.7f, @1.0f];
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opacityAnimation.timingFunctions = @[timingFunction, timingFunction];
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// Animation
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CAAnimationGroup *animation = [self createAnimationGroup];;
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animation.animations = @[scaleAnimation, opacityAnimation];
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animation.beginTime = CACurrentMediaTime();
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animation.repeatCount = HUGE_VALF;
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// Draw circle
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for (int i = 0; i < 3; i++) {
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for (int j = 0; j < 3; j++) {
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CALayer *circle = [self createCirleWith:circleSize color:tintColor];
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animation.duration = [durations[3 * i + j] floatValue];
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animation.timeOffset = [timeOffsets[3 * i + j] floatValue];
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circle.frame = CGRectMake(x + circleSize * j + circleSpacing * j, y + circleSize * i + circleSpacing * i, circleSize, circleSize);
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[circle addAnimation:animation forKey:@"animation"];
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[layer addSublayer:circle];
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}
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}
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}
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- (CALayer *)createCirleWith:(CGFloat)size color:(UIColor *)color {
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CAShapeLayer *circle = [CAShapeLayer layer];
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UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, size, size) cornerRadius:size / 2];
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circle.fillColor = color.CGColor;
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circle.path = circlePath.CGPath;
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return circle;
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}
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@end
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