56 lines
2.2 KiB
Objective-C
Executable File
56 lines
2.2 KiB
Objective-C
Executable File
//
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// DGActivityIndicatorBallGridBeatAnimation.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 "DGActivityIndicatorBallGridBeatAnimation.h"
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@implementation DGActivityIndicatorBallGridBeatAnimation
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- (void)setupAnimationInLayer:(CALayer *)layer withSize:(CGSize)size tintColor:(UIColor *)tintColor {
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NSArray *durations = @[@0.96f, @0.93f, @1.19f, @1.13f, @1.34f, @0.94f, @1.2f, @0.82f, @1.19f];
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NSArray *timeOffsets = @[@0.36f, @0.4f, @0.68f, @0.41f, @0.71f, @-0.15f, @-0.12f, @0.01f, @0.32f];
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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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// Animation
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CAKeyframeAnimation *animation = [self createKeyframeAnimationWithKeyPath:@"opacity"];
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animation.beginTime = CACurrentMediaTime();
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animation.keyTimes = @[@0.0f, @0.5f, @1.0f];
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animation.values = @[@1.0f, @0.7f, @1.0f];
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animation.repeatCount = HUGE_VALF;
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animation.timingFunctions = @[timingFunction, timingFunction];
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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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