今天主要用到的动画类是CALayer下的CATransition至于各种动画类中如何继承的在这也不做赘述，网上的资料是一抓一大把。好废话少说切入今天的正题。
一.封装动画方法
1.用CATransition实现动画的封装方法如下，每句代码是何意思，请看注释之。
#pragma CATransition动画实现 - (void) transitionWithType:(NSString *) type WithSubtype:(NSString *) subtype ForView : (UIView *) view { //创建CATransition对象 CATransition *animation = [CATransition animation]; //设置运动时间 animation.duration = DURATION; //设置运动type animation.type = type; if (subtype != nil) { //设置子类 animation.subtype = subtype; } //设置运动速度 animation.timingFunction = UIViewAnimationOptionCurveEaseInOut; [view.layer addAnimation:animation forKey:@"animation"]; }
代码说明：
CATransition常用的属性如下：
duration:设置动画时间
type:稍后下面会详细的介绍运动类型
subtype:和type匹配使用，指定运动的方向，下面也会详细介绍
timingFunction ：动画的运动轨迹，用于变化起点和终点之间的插值计算,形象点说它决定了动画运行的节奏,比如是
均匀变化(相同时间变化量相同)还是先快后慢,先慢后快还是先慢再快再慢.
* 动画的开始与结束的快慢,有五个预置分别为(下同):
* kCAMediaTimingFunctionLinear 线性,即匀速
* kCAMediaTimingFunctionEaseIn 先慢后快
* kCAMediaTimingFunctionEaseOut 先快后慢
* kCAMediaTimingFunctionEaseInEaseOut 先慢后快再慢
* kCAMediaTimingFunctionDefault 实际效果是动画中间比较快.
2.用UIView的block回调实现动画的代码封装
#pragma UIView实现动画 - (void) animationWithView : (UIView *)view WithAnimationTransition : (UIViewAnimationTransition) transition { [UIView animateWithDuration:DURATION animations:^{ [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationTransition:transition forView:view cache:YES]; }]; }
3.改变View的背景图，便于切换时观察
#pragma 给View添加背景图 -(void)addBgImageWithImageName:(NSString *) imageName { self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:imageName]]; }
二.调用上面的方法实现我们想要的动画
1.我们在View上添加多个Button,给不同的Button设置不同的Tag值，然后再ViewController中绑定同一个方法，点击不同的button实现不同的页面切换效果。storyBoard上的控件效果如下图所示：
2.下面我们就开始编写点击button要回调的方法
(1).定义枚举来标示按钮所对应的动画类型，代码如下：
typedef enum : NSUInteger { Fade = , //淡入淡出 Push, //推挤 Reveal, //揭开 MoveIn, //覆盖 Cube, //立方体 SuckEffect, //吮吸 OglFlip, //翻转 RippleEffect, //波纹 PageCurl, //翻页 PageUnCurl, //反翻页 CameraIrisHollowOpen, //开镜头 CameraIrisHollowClose, //关镜头 CurlDown, //下翻页 CurlUp, //上翻页 FlipFromLeft, //左翻转 FlipFromRight, //右翻转 } AnimationType;
(2),获取Button的Tag值：
UIButton *button = sender; AnimationType animationType = button.tag;
(3).每次点击button都改变subtype的值，包括上,左,下,右
NSString *subtypeString; switch (_subtype) { case : subtypeString = kCATransitionFromLeft; break; case : subtypeString = kCATransitionFromBottom; break; case : subtypeString = kCATransitionFromRight; break; case : subtypeString = kCATransitionFromTop; break; default: break; } _subtype += ; if (_subtype > ) { _subtype = ; }
(4),通过switch结合上边的枚举来判断是那个按钮点击的
switch (animationType) { //各种Case,此处代码下面会给出 }
3.调用我们封装的运动方法，来实现动画效果
(1),淡化效果
case Fade: [self transitionWithType:kCATransitionFade WithSubtype:subtypeString ForView:self.view]; break;
(2).Push效果
case Push: [self transitionWithType:kCATransitionPush WithSubtype:subtypeString ForView:self.view]; break;
效果如下：
(3).揭开效果：
case Reveal: [self transitionWithType:kCATransitionReveal WithSubtype:subtypeString ForView:self.view]; break;
效果图如下：
(4).覆盖效果
case MoveIn: [self transitionWithType:kCATransitionMoveIn WithSubtype:subtypeString ForView:self.view]; break;
效果图如下：
(5).立方体效果
case Cube: [self transitionWithType:@"cube" WithSubtype:subtypeString ForView:self.view]; break;
效果如下：
(6).吮吸效果
case SuckEffect: [self transitionWithType:@"suckEffect" WithSubtype:subtypeString ForView:self.view]; break;
效果如下：
(7).翻转效果
case OglFlip: [self transitionWithType:@"oglFlip" WithSubtype:subtypeString ForView:self.view]; break;
效果图如下：
8.波纹效果
case RippleEffect: [self transitionWithType:@"rippleEffect" WithSubtype:subtypeString ForView:self.view]; break;
(9).翻页和反翻页效果
case PageCurl: [self transitionWithType:@"pageCurl" WithSubtype:subtypeString ForView:self.view]; break; case PageUnCurl: [self transitionWithType:@"pageUnCurl" WithSubtype:subtypeString ForView:self.view]; break;
(10).相机打开效果
case CameraIrisHollowOpen: [self transitionWithType:@"cameraIrisHollowOpen" WithSubtype:subtypeString ForView:self.view]; break; case CameraIrisHollowClose: [self transitionWithType:@"cameraIrisHollowClose" WithSubtype:subtypeString ForView:self.view]; break;
(11),调用上面封装的第二个动画方法
case CurlDown: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionCurlDown]; break; case CurlUp: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionCurlUp]; break; case FlipFromLeft: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionFlipFromLeft]; break; case FlipFromRight: [self animationWithView:self.view WithAnimationTransition:UIViewAnimationTransitionFlipFromRight]; break;
以上内容是针对iOS开发中常用的各种动画、页面切面效果的相关介绍，希望对大家有所帮助！