这两种动画实现起来都很简单，苹果已经为我们封装好了，并且提供了多种好看实用的效果
弹簧动画
弹簧动画
- (void)viewDidLoad {
[super viewDidLoad];
// 创建一个气泡
UIButton * bubble = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
[self.view addSubview:bubble];
bubble.layer.cornerRadius = 50;
bubble.backgroundColor = [UIColor cyanColor];
[bubble addTarget:self action:@selector(bubbleAction:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)bubbleAction:(UIButton *)button {
// 先缩小
button.transform = CGAffineTransformMakeScale(0.7, 0.7);
// 弹簧动画，参数分别为：时长，延时，弹性（越小弹性越大），初始速度
[UIView animateWithDuration: 0.7 delay:0 usingSpringWithDamping:0.3 initialSpringVelocity:0.3 options:0 animations:^{
// 放大
button.transform = CGAffineTransformMakeScale(1, 1);
} completion:nil];
}
完事
视图过渡动画
视图过渡动画有两种，一种是单个视图的过渡动画，另一种是两个UIView之间的过渡
过渡类型：
- UIViewAnimationOptionTransitionFlipFromTop由上向下翻转动画
- UIViewAnimationOptionTransitionFlipFromBottom由下向上翻转动画
- UIViewAnimationOptionTransitionCrossDissolve渐现动画
- UIViewAnimationOptionTransitionCurlDown由上到下翻页动画
- UIViewAnimationOptionTransitionCurlUp由下到上翻页动画
- UIViewAnimationOptionTransitionFlipFromRight由左向右翻转
- UIViewAnimationOptionTransitionFlipFromLeft由右向左翻转
速度
- UIViewAnimationOptionCurveEaseInOut 缓入缓出，开始和结束时减速
- UIViewAnimationOptionCurveEaseIn 缓入，开始时候减速
- UIViewAnimationOptionCurveEaseOut 缓出，结束时减速
- UIViewAnimationOptionCurveLinear 线性，匀速运动
过渡视图和速度在动画的options参数中使用。但是不要使用多种过渡类型，真是要难看死了我的天哪。
options: UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionCurveEaseInOut
Swift写法（感谢熊格智障的评论）：
options: [.TransitionCrossDissolve,.CurveEaseInOut]
1. 单个视图的过渡
单个视图的动画
- (void)viewDidLoad {
[super viewDidLoad];
// 创建一个按钮
UIButton * button = [[UIButton alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
[self.view addSubview:button];
button.backgroundColor = [UIColor orangeColor];
button.layer.cornerRadius = 3;
[button setTitle:@"👀" forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)buttonAction:(UIButton *)button {
// transition动画：指定一个view，单独为它设置transition的动画
// option设置动画类型，这里使用翻页动画以及淡出淡入
[UIView transitionWithView:button duration:0.7 options:UIViewAnimationOptionTransitionCurlDown | UIViewAnimationOptionCurveEaseOut animations:^{
[button setTitle:@"😝" forState:UIControlStateNormal];
} completion:nil];
}
再来一个实用的imageView图片渐变效果：
图片渐变
@interface ViewController ()
@property (nonatomic, retain) UIImageView * imageView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 200)];
[self.view addSubview:_imageView];
_imageView.image = [UIImage imageNamed:@"1.jpg"];
// 1s后换图片
[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(changeImage) userInfo:nil repeats:NO];
}
- (void)changeImage {
// 使用渐变效果就够了
[UIView transitionWithView:_imageView duration:1 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
_imageView.image = [UIImage imageNamed:@"2.jpg"];
} completion:nil];
}
2. 两个视图的过渡动画
两个视图的过渡动画
方法：
UIView的transitionFromView: toView: duration: options:方法
官方解释：toView added to fromView.superview, fromView removed from its superview
实际效果：动画的作用范围为fromView的父视图的frame。动画结束后fromView会被删除，toView会被添加到fromView的父视图
@interface ViewController ()
@property (nonatomic, retain) UIView * view1;
@property (nonatomic, retain) UIView * view2;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 创建占用半个屏幕的view，作为过渡view的父视图，测试动画的作用范围
UIView * bigView = [[UIView alloc] initWithFrame: CGRectMake(0, 0, self.view.frame.size.width, 300)];
[self.view addSubview:bigView];
bigView.backgroundColor = [UIColor orangeColor];
self.view1 = [[UIView alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
[bigView addSubview:_view1];
_view1.backgroundColor = [UIColor redColor];
self.view2 = [[UIView alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
// 不要加到视图上！看效果
// [self.view addSubview:_view2];
_view2.backgroundColor = [UIColor blackColor];
// 1s后执行
[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(animate) userInfo:nil repeats:NO];
}
- (void)animate {
[UIView transitionFromView:_view1 toView:_view2 duration:1 options:UIViewAnimationOptionTransitionCurlDown completion:^(BOOL finished) {
}];
}
@end
