IOS动画效果

iOS动画实现详解

最新推荐文章于 2022-08-24 11:16:57 发布

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本文详细介绍iOS中不同类型的动画实现方式，包括最普通的动画、连续动画、CATransitionPublicAPI动画及PrivateAPI动画等，并展示了UIViewAnimations的使用方法及iOS 4.0新增的动画技巧。

最普通动画:
//开始动画
[UIView beginAnimations:nil context:nil];
//设定动画持续时间
[UIView setAnimationDuration:2];
//动画的内容
frame.origin.x += 150;
[img setFrame:frame];
//动画结束
[UIView commitAnimations];

连续动画:一个接一个地显示一系列的图像
NSArray *myImages = [NSArray arrayWithObjects:
[UIImage imageNamed:@"myImage1.png"],
[UIImage imageNamed:@"myImage2.png"],
[UIImage imageNamed:@"myImage3.png"],
[UIImage imageNamed:@"myImage4.gif"], nil];

UIImageView *myAnimatedView = [UIImageView alloc];
[myAnimatedView initWithFrame:[self bounds]];
myAnimatedView.animationImages = myImages; //animationImages属性返回一个存放动画图片的数组
myAnimatedView.animationDuration = 0.25; //浏览整个图片一次所用的时间
myAnimatedView.animationRepeatCount = 0; // 0 = loops forever 动画重复次数
[myAnimatedView startAnimating];
[self addSubview:myAnimatedView];
[myAnimatedView release];

CATransition Public API动画:
CATransition *animation = [CATransition animation];
//动画时间
    animation.duration = 0.5f;
//先慢后快
    animation.timingFunction = UIViewAnimationCurveEaseInOut;
animation.fillMode = kCAFillModeForwards;
//animation.removedOnCompletion = NO;

//各种动画效果

//各种组合
animation.type = kCATransitionPush;
animation.subtype = kCATransitionFromRight;

[self.view.layer addAnimation:animation forKey:@"animation"];

CATransition Private API动画:
animation.type可以设定为以下效果
动画效果汇总:

UIView Animations 动画:
[UIView beginAnimations:@"animationID" context:nil];
[UIView setAnimationDuration:0.5f];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationRepeatAutoreverses:NO];
//以下四种效果

[self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:0];
[UIView commitAnimations];
IOS4.0新方法:
方法: +(void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations;
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion; //多一个动画结束后可以执行的操作.
//下边是嵌套使用,先变大再消失的动画效果.
[UIView animateWithDuration:1.25 animations:^{
CGAffineTransform newTransform = CGAffineTransformMakeScale(1.2, 1.2);
[firstImageView setTransform:newTransform];
[secondImageView setTransform:newTransform];}
completion:^(BOOL finished){
[UIView animateWithDuration:1.2 animations:^{
[firstImageView setAlpha:0];
[secondImageView setAlpha:0];} completion:^(BOOL finished){
[firstImageView removeFromSuperview];
[secondImageView removeFromSuperview]; }];
}];