前言
最近有些空闲时间，整理了下最近做的项目，本文主要介绍了关于iOS自定义控制器转场动画push的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。
效果图：
iOS7 开始苹果推出了自定义转场的 API 。从此，任何可以用 CoreAnimation 实现的动画，都可以出现在两个 ViewController 的切换之间。并且实现方式高度解耦，这也意味着在保证代码干净的同时想要替换其他动画方案时只需简单改一个类名就可以了，真正体会了一把高颜值代码带来的愉悦感。
其实网上关于自定义转场动画的教程很多，这里我是希望同学们能易懂，易上手。
转场分两种Push和Modal,所以自定义转场动画也就肯定分两种，今天我们讲的是Push
自定义转场动画Push
首先搭建界面，添加4个按钮：
- (void)addButton{
self.buttonArr = [NSMutableArray array];
CGFloat margin=50;
CGFloat width=(self.view.frame.size.width-margin*3)/2;
CGFloat height = width;
CGFloat x = 0;
CGFloat y = 0;
//列
NSInteger col = 2;
for (NSInteger i = 0; i < 4; i ++) {
x = margin + (i%col)*(margin+width);
y = margin + (i/col)*(margin+height) + 150;
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(x, y, width, height);
button.layer.cornerRadius = width * 0.5;
[button addTarget:self action:@selector(btnclick:) forControlEvents:UIControlEventTouchUpInside];
button.backgroundColor = [UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:1.0];
button.tag = i+1;
[self.view addSubview:button];
[self.buttonArr addObject:button];
}
}
添加动画：
- (void)setupButtonAnimation{
[self.buttonArr enumerateObjectsUsingBlock:^(UIButton * _Nonnull button, NSUInteger idx, BOOL * _Nonnull stop) {
// positionAnimation
CAKeyframeAnimation *positionAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
positionAnimation.calculationMode = kCAAnimationPaced;
positionAnimation.fillMode = kCAFillModeForwards;
positionAnimation.repeatCount = MAXFLOAT;
positionAnimation.autoreverses = YES;
positionAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
positionAnimation.duration = (idx == self.buttonArr.count - 1) ? 4 : 5+idx;
UIBezierPath *positionPath = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(button.frame, button.frame.size.width/2-5, button.frame.size.height/2-5)];
positionAnimation.path = positionPath.CGPath;
[button.layer addAnimation:positionAnimation forKey:nil];
// scaleXAniamtion
CAKeyframeAnimation *scaleXAniamtion = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.x"];
scaleXAniamtion.values = @[@1.0,@1.1,@1.0];
scaleXAniamtion.keyTimes = @[@0.0,@0.5,@1.0];
scaleXAniamtion.repeatCount = MAXFLOAT;
scaleXAniamtion.autoreverses = YES;
scaleXAniamtion.duration = 4+idx;
[button.layer addAnimation:scaleXAniamtion forKey:nil];
// scaleYAniamtion
CAKeyframeAnimation *scaleYAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.y"];
scaleYAnimation.values = @[@1,@1.1,@1.0];
scaleYAnimation.keyTimes = @[@0.0,@0.5,@1.0];
scaleYAnimation.autoreverses = YES;
scaleYAnimation.repeatCount = YES;
scaleYAnimation.duration = 4+idx;
[button.layer addAnimation:scaleYAnimation forKey:nil];
}];
}
