CATransitionDemo

注：其中有些效果调用了CATransition的Private API, 仅供娱乐。

补充：还是有好多小伙伴问那些可以在AppStore中使用，调用私有API的肯定是不行的，而下方有些就调用了私有API。

下方会用到一些私有API, 有些效果在APPStore中是不能使用的，私有API如下：

NSString *const kCATransitionCube = @"cube";  
NSString *const kCATransitionSuckEffect = @"suckEffect"; 
NSString *const kCATransitionOglFlip = @"oglFlip";  
NSString *const kCATransitionRippleEffect = @"rippleEffect";  
NSString *const kCATransitionPageCurl = @"pageCurl"; 
NSString *const kCATransitionPageUnCurl = @"pageUnCurl";   
NSString *const kCATransitionCameraIrisHollowOpen = @"cameraIrisHollowOpen";
NSString *const kCATransitionCameraIrisHollowClose = @"cameraIrisHollowClose";

而下方这些可以放心使用：

// CAAnimation.h

/* Common transition types. */

CA_EXTERN NSString * const kCATransitionFade
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionMoveIn
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionPush
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionReveal
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);

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 = 1,                   //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 0:
            subtypeString = kCATransitionFromLeft;
            break;
        case 1:
            subtypeString = kCATransitionFromBottom;
            break;
        case 2:
            subtypeString = kCATransitionFromRight;
            break;
        case 3:
            subtypeString = kCATransitionFromTop;
            break;
        default:
            break;
    }
    _subtype += 1;
    if (_subtype > 3) {
        _subtype = 0;
    }

(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;

(3)、揭开效果

 case Reveal:
     [self transitionWithType:kCATransitionReveal WithSubtype:subtypeString ForView:self.view];
     break;

(4)、覆盖效果

case MoveIn:
    [self transitionWithType:kCATransitionMoveIn WithSubtype:subtypeString ForView:self.view];
    break;

(5)、立方体切换

case Cube:
    [self transitionWithType:@"cube" WithSubtype:subtypeString ForView:self.view];
    break;

(6)、吮吸效果

case SuckEffect:
    [self transitionWithType:@"suckEffect" WithSubtype:subtypeString ForView:self.view];
    break;

(7)、翻转效果

case OglFlip:
    [self transitionWithType:@"oglFlip" WithSubtype:subtypeString ForView:self.view];
    break;

(8)、波纹效果

case RippleEffect:
    [self transitionWithType:@"rippleEffect" WithSubtype:subtypeString ForView:self.view];
    break;

(9)、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;