58 lines
2.2 KiB
Objective-C
Executable File
58 lines
2.2 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorBallBeatAnimation.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 "DGActivityIndicatorBallBeatAnimation.h"
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@implementation DGActivityIndicatorBallBeatAnimation
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- (void)setupAnimationInLayer:(CALayer *)layer withSize:(CGSize)size tintColor:(UIColor *)tintColor {
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CGFloat duration = 0.7f;
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NSArray *beginTimes = @[@0.35f, @0.0f, @0.35f];
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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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// Scale animation
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CAKeyframeAnimation *scaleAnimation = [self createKeyframeAnimationWithKeyPath:@"transform.scale"];
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scaleAnimation.duration = duration;
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scaleAnimation.keyTimes = @[@0.0f, @0.5f, @1.0f];
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scaleAnimation.values = @[@1.0f, @0.75f, @1.0f];
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// Opacity animation
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CAKeyframeAnimation *opacityAnimation = [self createKeyframeAnimationWithKeyPath:@"opacity"];
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opacityAnimation.duration = duration;
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opacityAnimation.keyTimes = @[@0.0f, @0.5f, @1.0f];
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opacityAnimation.values = @[@1.0f, @0.2f, @1.0f];
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// Aniamtion
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CAAnimationGroup *animation = [self createAnimationGroup];;
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animation.duration = duration;
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animation.animations = @[scaleAnimation, opacityAnimation];
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animation.repeatCount = HUGE_VALF;
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animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
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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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