CATransition的动画效果类型及实现方法

引用：http://hi.baidu.com/vbkan/blog/item/8b3314ca1b1da85ef31fe7d4.html

http://blog.sina.com.cn/s/blog_74d748180100qi8e.html

实现iphone漂亮的动画效果主要有两种方法，一种是UIView层面的，一种是使用CATransition进行更低层次的控制，

第一种是UIView，UIView方式可能在低层也是使用CATransition进行了封装，它只能用于一些简单的、常用的效果展现，这里写一个常用的示例代码，供大家参考。

[UIView beginAnimations:@"Curl"context:nil];//动画开始

[UIView setAnimationDuration:0.75];

[UIView setAnimationDelegate:self];

[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:myview cache:YES];

[myview removeFromSuperview];

[UIView commitAnimations];

第二种方式相对复杂一些，但如果更好的进行控制，还是使用这种方法吧，基本使用方法可以看一下如下例子：

CATransition *animation = [CATransition animation];

[animation setDuration:1.25f];

[animation setTimingFunction:[CAMediaTimingFunction

functionWithName:kCAMediaTimingFunctionEaseIn]];

[animation setType:kCATransitionReveal];

[animation setSubtype: kCATransitionFromBottom];

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

这里使用了setType与setSubtype组合，这使用个比较保险，因为他的参数就是官方API里定义的，他们的参数说明可以参考如下（默认类型是淡入淡出类型。）：

setType:可以返回四种类型：

kCATransitionFade 淡出

kCATransitionMoveIn 覆盖原图

kCATransitionPush 推出

kCATransitionReveal底部显出来

setSubtype:也可以有四种类型：

kCATransitionFromRight；

kCATransitionFromLeft(默认值)

kCATransitionFromTop；

kCATransitionFromBottom

还有一种设置动画类型的方法，不用setSubtype，只用setType

[animation setType:@"suckEffect"];

这里的suckEffect就是效果名称，可以用的效果主要有：

pageCurl 向上翻一页

pageUnCurl 向下翻一页

rippleEffect 滴水效果

suckEffect 收缩效果，如一块布被抽走

cube 立方体效果

oglFlip 上下翻转效果

最后再给出一种常用代码供大家参考。

示例代码一：

// Curl the image up or down

CATransition *animation = [CATransition animation];

[animation setDuration:0.35];

[animation setTimingFunction:UIViewAnimationCurveEaseInOut];

if (!curled){

//animation.type = @"mapCurl";

animation.type = @"pageCurl";

animation.fillMode = kCAFillModeForwards;

animation.endProgress = 0.99;

} else {

//animation.type = @"mapUnCurl";

animation.type = @"pageUnCurl";

animation.fillMode = kCAFillModeBackwards;

animation.startProgress = 0.01;

}

[animation setRemovedOnCompletion:NO];

[view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];

[view addAnimation:animation forKey"pageCurlAnimation"];

// Disable user interaction where necessary

if (!curled) {

} else {

}

urled = !curled;

示例代码二：

头部导入： #import <QuartzCore/QuartzCore.h>

- (void) startAction:(id) sender{

// 定义动画

CATransition *animation = [CATransition animation];

animation.delegate = self;

animation.duration =1.0f;

animation.timingFunction = UIViewAnimationCurveEaseInOut;

//可根据需要，设置type和subtype属性产生不同的动画效果

//animation.type = kCATransitionPush;

//animation.type = kCATransitionMoveIn;

//animation.type = kCATransitionReveal;

//animation.type = kCATransitionFade;

//animation.subtype = kCATransitionPush;

//animation.subtype = kCATransitionMoveIn;

//animation.subtype = kCATransitionReveal;

//animation.subtype = kCATransitionFade;

switch ([(UISegmentedControl *)self.navigationItem.titleView selectedSegmentIndex]) {

case 0:

animation.type = @"rippleEffect";

//animation.type = @"cube"; //立方体翻转

//animation.type = @"oglFlip"; //层翻转

//animation.type = @"cameraIrisHollowClose";

//animation.type = @"cameraIrisHollowOpen";

break;

case 1:

animation.type = @"pageCurl";

break;

case 2:

animation.type = @"pageUnCurl";

break;

case 3:

animation.type = @"suckEffect";

break;

default:

break;

}

switch (direction) { //方向

case 0:

animation.subtype = kCATransitionFromRight;

break;

case 1:

animation.subtype = kCATransitionFromTop;

break;

case 2:

animation.subtype = kCATransitionFromLeft;

break;

case 3:

animation.subtype = kCATransitionFromBottom;

break;

default:

break;

}

//执行动画

UIView *bgView = [self.view viewWithTag:150];

NSInteger front = [[bgView subviews] indexOfObject:[bgView viewWithTag:151]];

NSInteger back = [[bgView subviews] indexOfObject:[bgView viewWithTag:152]];

if (someThing) {

[bgView exchangeSubviewAtIndex:front withSubviewAtIndex:back]; //图形变换

}else {

[bgView exchangeSubviewAtIndex:back withSubviewAtIndex:front];

}

[[bgView layer] addAnimation:animation forKey:@"animation"]; //bgView层执行动画

//[[self.view layer] addAnimation:animation forKey:@"animation"]; //self.view层执行动画

}