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CAAnimation总结

时间:2015-09-11 14:20:09      阅读:256      评论:0      收藏:0      [点我收藏+]

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我们通常所说的核心动画结构图如上,下面分别介绍对应的动画

1.  1)我们可以新建多个动画,然后将些动画放到数组中,让后将这个数组赋值给groupAnimation的animations

     2)对goupAnimation做相应的配置,比如时间和重复次数

     3)将动画加到layer层

具体例子如下:

    
    CABasicAnimation *xAni = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    xAni.toValue = @(1);
    CABasicAnimation *zAni = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    zAni.toValue = @(2);
    
    /*
     动画组(多个动画同时进行)
     */
    CAAnimationGroup *group = [CAAnimationGroup animation];
    //动画时间
    group.duration = 2.0;
    //设置动画对象
    group.animations = @[xAni,zAni];
    group.repeatCount = MAXFLOAT;
    //把动画组加到是视图的图层上
    [_greenView.layer addAnimation:group forKey:nil];

 2.CATransition我们成为过渡动画,我们可以用它来实现页面的间绚丽的切换效果

  1. 创建CATransition对象,并且做基本的设置,如类型和时间;      
  2. 根据不同的操作设定相应的subtype值;
  3. 将动画添加到Layer层;

具体的代码如下:

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    index = 1;
    
    
    [self.view addSubview:self.transitionView];
    [self addSwipeGestureRecognizer];
    
    
    
    
}

/**
 手势事件处理
 */
- (void)swipe:(UISwipeGestureRecognizer *)gesture
{
    //过渡动画
    CATransition *transition = [CATransition animation];
    //设置类型
    transition.type = @"cube";
    //动画时间
    transition.duration = 2;

    
    //判断方向
    //向右滑
    if (gesture.direction == UISwipeGestureRecognizerDirectionRight)
    {
        index--;
        //子类型
        transition.subtype =  kCATransitionFromLeft;
    }
    else
    {
        index++;
        
        transition.subtype =  kCATransitionFromRight;
    }
    
    //添加动画到层
    [_transitionView.layer addAnimation:transition forKey:nil];
    
    //修改图片
    _transitionView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%lu.jpg",(long)index]];
}

//添加轻扫手势
- (void)addSwipeGestureRecognizer
{
    UISwipeGestureRecognizer *swipeForLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    //方向
    swipeForLeft.direction = UISwipeGestureRecognizerDirectionLeft;
    [_transitionView addGestureRecognizer:swipeForLeft];
    
    UISwipeGestureRecognizer *swipeForRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    swipeForRight.direction = UISwipeGestureRecognizerDirectionRight;
    [_transitionView addGestureRecognizer:swipeForRight];
}

//返回transitionView
- (CATransitionView *)transitionView
{
    if (!_transitionView)
    {
        _transitionView = [[CATransitionView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.width)];
        _transitionView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%lu.jpg",(long)index]];
        _transitionView.backgroundColor = [UIColor lightGrayColor];
        
    }
    
    return _transitionView;
}

 

 其中:CATransition中type的值:

 1     fade = 1,                   //淡入淡出

 2     push,                       //推挤

 3     reveal,                     //揭开

 4     moveIn,                     //覆盖

 5     cube,                       //立方体

 6     suckEffect,                 //吮吸

 7     oglFlip,                    //翻转

 8     rippleEffect,               //波纹

 9     pageCurl,                   //翻页

10     pageUnCurl,                 //反翻页

11     cameraIrisHollowOpen,       //开镜头

12     cameraIrisHollowClose,      //关镜头

下面这个几个用在UIView的setAnimationTransition方法中

13     UIViewAnimationTransitionCurlDown, //下翻页

14     UIViewAnimationTransitionCurlUp,   //上翻页

15     UIViewAnimationTransitionFlipFromLeft,  //左翻转

16     UIViewAnimationTransitionFlipFromRight, //右翻转

3. 1  CAPropertyAnimation中的BasicAnimation,这个动画类似于UIKit中的动画,都是通过修改keyPath的值来产生的,只不过比那个动画要复杂,步骤同上,具体代码如下:

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    
    /**
     背景颜色动画
     */
    CABasicAnimation *basicAnimation = [CABasicAnimation
                                        animationWithKeyPath:@"backgroundColor"];
    basicAnimation.duration = 2;
    basicAnimation.toValue = (id)[UIColor greenColor].CGColor;
    //自动反转
    basicAnimation.autoreverses = YES;
    //循环次数
    basicAnimation.repeatCount = MAXFLOAT;
    
    [_imageView.layer addAnimation:basicAnimation forKey:nil];
    [self refresh];
    
}

/**
 圆角动画
 */
- (void)test1
{
    CABasicAnimation *basicAnimation = [CABasicAnimation
                                        animationWithKeyPath:@"cornerRadius"];
    basicAnimation.duration = 2;
    basicAnimation.toValue = @40;
    //自动反转
    basicAnimation.autoreverses = YES;
    //循环次数
    basicAnimation.repeatCount = MAXFLOAT;
    
    [_imageView.layer addAnimation:basicAnimation forKey:nil];
}

/**
 刷新动画
 */
- (void)refresh
{
    /**
     基本动画
     */
    CABasicAnimation *basicAnimation = [CABasicAnimation
                                        animationWithKeyPath:@"transform.rotation.z"];
    basicAnimation.duration = 2;
    //byValue和toValue的区别,前者是在当前的位置上增加多少,后者是到指定的位置。
    basicAnimation.toValue = @(M_PI * 2);
    basicAnimation.repeatCount = MAXFLOAT;
    
    //添加动画
    [_imageView.layer addAnimation:basicAnimation forKey:nil];
}

 常用的KeyPath如下:

   rotation.x/y/z scale.x/y/z translation.x/y/z 

   opacity = 透明度

    margin

    zPosition

    backgroundColor    背景颜色

    cornerRadius    圆角

    borderWidth

    bounds

    contents

    contentsRect

    hidden

    mask

    masksToBounds

    opacity

    position

    shadowColor

    shadowOffset

    shadowOpacity

    shadowRadius

3.2 关键帧动画可以让动画在几个点上移动,或者在某个区域内部移动,这些移动的速度也是可调节的,实现步骤如下:

  1. 创建path
  2. 创建CAKeyframeAnimation,将path赋值给.path
  3. 设置CAKeyFramAnimation的其它属性
  4. 在layer层添加动画并且释放path 利用Create,Copy,Retain创建的对象也需要手动释放

具体的实现代码如下:

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    

    _v = [[UIView alloc] initWithFrame:CGRectMake(20, 40, 20, 20)];

    _v.backgroundColor = [UIColor redColor];

    //_v.layer.cornerRadius = 10;

    _v.layer.position = CGPointMake(20, 40);

    [self.view addSubview:_v];

    

    [self pointMove];

    

}

 

/**

 移动根据指定的path

 */

- (void)circleMove

{

    /*

     Create,Copy,Retain 也需要手动释放。

     */

    CGMutablePathRef path = CGPathCreateMutable();

    CGPathAddEllipseInRect(path, NULL, CGRectMake(30, 50, 300, 300));

    

    CAKeyframeAnimation *keyframeAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];

    keyframeAnimation.duration = 3;

    //设置路径

    keyframeAnimation.path = path;

    //重复次数

    keyframeAnimation.repeatCount = MAXFLOAT;

    // calculationMode 是控制关键帧动画时间的另一种方法。我们通过将其设置为 kCAAnimationPaced,让 Core Animation 向被驱动的对象施加一个恒定速度,不管路径的各个线段有多长。

    keyframeAnimation.calculationMode = kCAAnimationPaced;

    

    //添加动画

    [_v.layer addAnimation:keyframeAnimation forKey:@"circleMove"];

 

    //释放

    CGPathRelease(path);

    

    //停止动画

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

        [_v.layer removeAnimationForKey:@"circleMove"];

    });

}

 

/*

 根据指定的关键部分移动

 */

- (void)pointMove

{

    /**

     关键帧动画

     */

    CAKeyframeAnimation *keyframeAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];

    //设置时间

    keyframeAnimation.duration = 2;

    //自动反转(原路返回)

    keyframeAnimation.autoreverses = YES;

    //移动的关键点

    keyframeAnimation.values = @[

                                 [NSValue valueWithCGPoint:CGPointMake(20, 40)],

                                 [NSValue valueWithCGPoint:CGPointMake(200, 400)],

                                 [NSValue valueWithCGPoint:CGPointMake(200, 60)],

                                 [NSValue valueWithCGPoint:CGPointMake(100, 160)]

                                 ];

    /*

     timingFunction :动画的运动轨迹,用于变化起点和终点之间的差值计算,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.

     */

    keyframeAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

    

    

    //添加动画

    [_v.layer addAnimation:keyframeAnimation forKey:nil];

}

 

CAAnimation总结

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原文地址:http://www.cnblogs.com/Mike-Fighting/p/4800660.html

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