ios动画笔记（1）CABasicAnimation和CAKeyframeAnimation

1、CABasicAnimation

使用方法animationWithKeyPath:对 CABasicAnimation进行实例化，并指定Layer的属性作为关键路径进行注册。

//围绕y轴旋转CABasicAnimation *transformAnima = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];

设定动画

设定动画的属性和说明

属性说明duration动画的时长repeatCount重复的次数。不停重复设置为 HUGE_VALFrepeatDuration设置动画的时间。在该时间内动画一直执行，不计次数。beginTime指定动画开始的时间。从开始延迟几秒的话，设置为【CACurrentMediaTime() + 秒数】 的方式timingFunction设置动画的速度变化autoreverses动画结束时是否执行逆动画fromValue所改变属性的起始值toValue所改变属性的结束时的值byValue所改变属性相同起始值的改变量

一些常用的animationWithKeyPath值的总结

值说明使用形式transform.scale比例转化@(0.8)transform.scale.x宽的比例@(0.8)transform.scale.y高的比例@(0.8)transform.rotation.x围绕x轴旋转@(M_PI)transform.rotation.y围绕y轴旋转@(M_PI)transform.rotation.z围绕z轴旋转@(M_PI)cornerRadius圆角的设置@(50)backgroundColor背景颜色的变化(id)[UIColor purpleColor].CGColorbounds大小，中心不变[NSValue valueWithCGRect:CGRectMake(0, 0, 200, 200)];position位置(中心点的改变)[NSValue valueWithCGPoint:CGPointMake(300, 300)];contents内容，比如UIImageView的图片imageAnima.toValue = (id)[UIImage imageNamed:@"to"].CGImage;opacity透明度@(0.7)contentsRect.size.width横向拉伸缩放@(0.4)最好是0~1之间的

+(void)basceAnimal1:(UIView *)view{    CABasicAnimation *positionAnima = [CABasicAnimation animationWithKeyPath:@"position.y"];    positionAnima.fromValue = @(view.center.y);    positionAnima.toValue = @(view.center.y + 200);    positionAnima.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];        CABasicAnimation *transformAnima = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];    transformAnima.fromValue = @(0);    transformAnima.toValue = @(13 * M_PI);//    transformAnima.beginTime    transformAnima.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];        //    CABasicAnimation *transformAnima = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];//    transformAnima.fromValue = @(0);//    transformAnima.toValue = @(13 * M_PI);//    transformAnima.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];        CAAnimationGroup *animaGroup = [CAAnimationGroup animation];    animaGroup.duration = 1.0f;    animaGroup.fillMode = kCAFillModeForwards;    animaGroup.removedOnCompletion = NO;    animaGroup.autoreverses = YES;    animaGroup.animations = @[positionAnima,transformAnima];    animaGroup.repeatCount = HUGE_VALF;        [view.layer addAnimation:animaGroup forKey:@"Animation"];}

详细参考:http://www.jianshu.com/p/02c341c748f9

2、CAKeyframeAnimation

   CABasicAnimation的区别是：CABasicAnimation只能从一个数值(fromValue)变到另一个数值(toValue)，而CAKeyframeAnimation会使用一个NSArray保存这些数值

- values：就是上述的NSArray对象。里面的元素称为”关键帧”(keyframe)。动画对象会在指定的时间(duration)内，依次显示values数组中的每一个关键帧

- path：可以设置一个CGPathRef\CGMutablePathRef,让层跟着路径移动。path只对CALayer的anchorPoint和position起作用。如果你设置了path，那么values将被忽略，还能用UIBezierPath方便绘制路径

- keyTimes：可以为对应的关键帧指定对应的时间点,其取值范围为0到1.0,keyTimes中的每一个时间值都对应values中的每一帧.当keyTimes没有设置的时候,各个关键帧的时间是平分的，keytimes指定的是动画持续时间内的每一帧的时间点，时间点是从0%-100%，时间不可能回退。。。

- keyPath可以使用的key

- #define angle2Radian(angle) ((angle)/180.0*M_PI)

- transform.rotation.x 围绕x轴翻转 参数：角度 angle2Radian(4)

transform.rotation.y 围绕y轴翻转 参数：同上

transform.rotation.z 围绕z轴翻转 参数：同上

transform.rotation 默认围绕z轴

transform.scale.x x方向缩放 参数：缩放比例 1.5

transform.scale.y y方向缩放 参数：同上

transform.scale.z z方向缩放 参数：同上

transform.scale 所有方向缩放 参数：同上

transform.translation.x x方向移动 参数：x轴上的坐标 100

transform.translation.y x方向移动 参数：y轴上的坐标

transform.translation.z x方向移动 参数：z轴上的坐标

transform.translation 移动 参数：移动到的点 （100，100）

opacity 透明度 参数：透明度 0.5

backgroundColor 背景颜色 参数：颜色 (id)[[UIColor redColor] CGColor]

cornerRadius 圆角 参数：圆角半径 5

borderWidth 边框宽度 参数：边框宽度 5

bounds 大小 参数：CGRect

contents 内容 参数：CGImage

contentsRect 可视内容 参数：CGRect 值是0～1之间的小数

hidden 是否隐藏

position

shadowColor

shadowOffset

shadowOpacity

shadowRadius

/**    15  *  将某个view或者layer从起点抛到终点    16  *    17  *  @param obj    被抛的物体    18  *  @param start  起点坐标    19  *  @param end    终点坐标    20  *  @param height 高度，抛物线最高点比起点/终点y坐标最低(即高度最高)所超出的高度    21  */- (void)throwObject:(UIView *)obj from:(CGPoint)start to:(CGPoint)end              height:(CGFloat)height duration:(CGFloat)duration{//     self.showingView = obj;     //初始化抛物线path     CGMutablePathRef path = CGPathCreateMutable();     CGFloat cpx = (start.x + end.x) / 2;     CGFloat cpy = -height;    NSLog(@"cpy = %f",cpy);     CGPathMoveToPoint(path, NULL, start.x, start.y);//    CGPathMoveToPoint(path, NULL, mScreenWidth/2, 0);     CGPathAddQuadCurveToPoint(path, NULL, cpx, cpy, end.x, end.y);    CGPathAddQuadCurveToPoint(path, NULL, mScreenWidth/2, mScreenHeight/2, height, mScreenHeight - height);     CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];     animation.path = path;    animation.fillMode=kCAFillModeForwards;     CFRelease(path);         CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];     scaleAnimation.autoreverses = YES;     scaleAnimation.toValue = [NSNumber numberWithFloat:(CGFloat)((arc4random() % 4) + 4) / 10.0];    scaleAnimation.fillMode=kCAFillModeForwards;//    scaleAnimation.autoreverses = NO;     CAAnimationGroup *groupAnimation = [CAAnimationGroup animation];     groupAnimation.delegate = self;     groupAnimation.repeatCount = 1;     groupAnimation.duration = duration;     groupAnimation.removedOnCompletion = NO;//    groupAnimation.autoreverses = NO;         groupAnimation.animations = @[scaleAnimation, animation];     [obj.layer addAnimation:groupAnimation forKey:@"position scale"];}

+(void)basceAnimal4:(UIView *)view{    CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];    animation.keyPath = @"position";    NSValue *value1=[NSValue valueWithCGPoint:CGPointMake(100, 100)];    NSValue *value2=[NSValue valueWithCGPoint:CGPointMake(200, 100)];    NSValue *value3=[NSValue valueWithCGPoint:CGPointMake(200, 200)];    NSValue *value4=[NSValue valueWithCGPoint:CGPointMake(100, 200)];    NSValue *value5=[NSValue valueWithCGPoint:CGPointMake(100, 100)];        animation.values=@[value1,value2,value3,value4,value5];    animation.repeatCount=MAXFLOAT;    animation.keyTimes = @[@0.0,@0.5,@0.7,@0.75,@0.95];    animation.removedOnCompletion = NO;    animation.fillMode = kCAFillModeForwards;        animation.duration = 4.0f;        animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];        animation.delegate=self;        [view.layer addAnimation:animation forKey:nil];}