iosAnimationDemo

完整的几个动画，可以作为以后的参考：

#import "LYButton.h"@interface LYButton()//渲染层@property (nonatomic,strong) CAShapeLayer *maskLayer;@property (nonatomic,strong) CAShapeLayer *shapeLayer;@property (nonatomic,strong) CAShapeLayer *loadingLayer;@property (nonatomic,strong) CAShapeLayer *clickCicrleLayer;@property (nonatomic,strong) UIButton *button;@end@implementation LYButton- (instancetype)initWithFrame:(CGRect)frame{    if(self = [super initWithFrame:frame])    {        _shapeLayer = [self drawMask:frame.size.height/2];        _shapeLayer.fillColor   = [UIColor clearColor].CGColor;        _shapeLayer.strokeColor = [UIColor whiteColor].CGColor;        _shapeLayer.lineWidth   = 2;        [self.layer addSublayer:_shapeLayer];                [self.layer addSublayer:self.maskLayer];                _button = [UIButton buttonWithType:UIButtonTypeCustom];        _button.frame = self.bounds;        [_button setTitle:@"SIGN IN" forState:UIControlStateNormal];        [_button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];        _button.titleLabel.font = [UIFont systemFontOfSize:13.f];        [self addSubview:_button];        [_button addTarget:self action:@selector(clickBtn) forControlEvents:UIControlEventTouchUpInside];    }    return self;}- (CAShapeLayer *)maskLayer{    if(!_maskLayer){        _maskLayer = [CAShapeLayer layer];        _maskLayer.opacity = 0;        _maskLayer.fillColor = [UIColor whiteColor].CGColor;        _maskLayer.path = [self drawBezierPath:self.frame.size.width/2].CGPath;    }    return _maskLayer;}- (void)clickBtn{    [self clickAnimation];}//点击出现白色圆形- (void)clickAnimation{    /*         解释：为什么动画结束后返回原状态？首先我们需要搞明白一点的是，layer动画运行的过程是怎样的？          其实在我们给一个视图添加layer动画时，真正移动并不是我们的视图本身，而是 presentation layer 的一个缓存。     动画开始时 presentation layer开始移动，原始layer隐藏，动画结束时，presentation layer从屏幕上移除，原始layer显示。     这就解释了为什么我们的视图在动画结束后又回到了原来的状态，因为它根本就没动过。          这个例子就是建立一个面积为0的CAShapeLayer视图     利用CABasicAnimation来将其扩大，产生放大效果     最后将其移除               对于presentationLayer，这个属性不一定总会返回一个实体对象，只有当进行动画或者其他渲染的操作时，这个属性会返回一个在当前屏幕上的layer     不且每一次执行，这个对象都会不同，它是原layer的一个副本presentationLayer的modelLayer就是其实体layer层。         */        CAShapeLayer *clickCicrleLayer = [CAShapeLayer layer];        /* 放在button中心，并且大小为5 */    clickCicrleLayer.frame = CGRectMake(self.bounds.size.width/2, self.bounds.size.height/2, 5, 5);    clickCicrleLayer.fillColor = [UIColor whiteColor].CGColor;    //    clickCicrleLayer.path = [self drawclickCircleBezierPath:(self.bounds.size.height - 10*2)/2].CGPath;        clickCicrleLayer.path = [self drawclickCircleBezierPath:0].CGPath;        [self.layer addSublayer:clickCicrleLayer];         //放大变色圆形    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"path"];    basicAnimation.duration = 0.5;    basicAnimation.toValue = (__bridge id _Nullable)([self drawclickCircleBezierPath:(self.bounds.size.height - 10*2)/2].CGPath);    basicAnimation.removedOnCompletion = NO;    basicAnimation.fillMode = kCAFillModeForwards;    [clickCicrleLayer addAnimation:basicAnimation forKey:@"clickCicrleAnimation"];        _clickCicrleLayer = clickCicrleLayer;////    //执行下一个动画    [self performSelector:@selector(clickNextAnimation) withObject:self afterDelay:basicAnimation.duration];}- (void)clickNextAnimation{    //圆形变圆弧    _clickCicrleLayer.fillColor   = [UIColor clearColor].CGColor;    _clickCicrleLayer.strokeColor = [UIColor whiteColor].CGColor;    _clickCicrleLayer.lineWidth   = 10;        CAAnimationGroup *animationGroup = [CAAnimationGroup animation];        //圆弧变大    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"path"];    basicAnimation.duration = 0.5;    basicAnimation.toValue = (__bridge id _Nullable)([self drawclickCircleBezierPath:(self.bounds.size.height - 10*2)].CGPath);    basicAnimation.removedOnCompletion = NO;    basicAnimation.fillMode = kCAFillModeForwards;        //变透明    CABasicAnimation *basicAnimation1 = [CABasicAnimation animationWithKeyPath:@"opacity"];    basicAnimation1.beginTime = 0.10;    basicAnimation1.duration = 0.5;    basicAnimation1.toValue = @0;    basicAnimation1.removedOnCompletion = NO;    basicAnimation1.fillMode = kCAFillModeForwards;        animationGroup.duration = basicAnimation1.beginTime + basicAnimation1.duration;    animationGroup.removedOnCompletion = NO;    animationGroup.fillMode = kCAFillModeForwards;    animationGroup.animations = @[basicAnimation,basicAnimation1];        [_clickCicrleLayer addAnimation:animationGroup forKey:@"clickCicrleAnimation1"];        [self performSelector:@selector(startMaskAnimation) withObject:self afterDelay:animationGroup.duration];}//半透明的登录按钮的背景- (void)startMaskAnimation{    _maskLayer.opacity = 0.5;    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"path"];    basicAnimation.duration = 0.25;    basicAnimation.toValue = (__bridge id _Nullable)([self drawBezierPath:self.frame.size.height/2].CGPath);    basicAnimation.removedOnCompletion = NO;    basicAnimation.fillMode = kCAFillModeForwards;    [_maskLayer addAnimation:basicAnimation forKey:@"maskAnimation"];        [self performSelector:@selector(dismissAnimation) withObject:self afterDelay:basicAnimation.duration+0.2];}//登录按钮合拢并消失（透明）- (void)dismissAnimation{    [self removeSubViews];        CAAnimationGroup *animationGroup = [CAAnimationGroup animation];        CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"path"];    basicAnimation.duration = 0.2;    basicAnimation.toValue = (__bridge id _Nullable)([self drawBezierPath:self.frame.size.width/2].CGPath);    basicAnimation.removedOnCompletion = NO;    basicAnimation.fillMode = kCAFillModeForwards;        CABasicAnimation *basicAnimation1 = [CABasicAnimation animationWithKeyPath:@"opacity"];    basicAnimation1.beginTime = 0.10;    basicAnimation1.duration = 0.2;    basicAnimation1.toValue = @0;    basicAnimation1.removedOnCompletion = NO;    basicAnimation1.fillMode = kCAFillModeForwards;        animationGroup.animations = @[basicAnimation,basicAnimation1];    animationGroup.duration = basicAnimation1.beginTime+basicAnimation1.duration;    animationGroup.removedOnCompletion = NO;    animationGroup.fillMode = kCAFillModeForwards;    [_shapeLayer addAnimation:animationGroup forKey:@"dismissAnimation"];        [self performSelector:@selector(loadingAnimation) withObject:self afterDelay:animationGroup.duration];}//菊花- (void)loadingAnimation{    _loadingLayer = [CAShapeLayer layer];    _loadingLayer.position = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);    _loadingLayer.fillColor = [UIColor clearColor].CGColor;    _loadingLayer.strokeColor = [UIColor whiteColor].CGColor;    _loadingLayer.lineWidth = 2;    _loadingLayer.path = [self drawLoadingBezierPath].CGPath;    [self.layer addSublayer:_loadingLayer];    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];    basicAnimation.fromValue = @(0);    basicAnimation.toValue = @(M_PI*2);    basicAnimation.duration = 0.5;    basicAnimation.repeatCount = LONG_MAX;    [_loadingLayer addAnimation:basicAnimation forKey:@"loadingAnimation"];        [self performSelector:@selector(removeAllAnimation) withObject:self afterDelay:2];}- (void)removeSubViews{    [_button removeFromSuperview];    [_maskLayer removeFromSuperlayer];    [_loadingLayer removeFromSuperlayer];    [_clickCicrleLayer removeFromSuperlayer];}- (void)removeAllAnimation{    [self removeSubViews];    if(self.translateBlock)    {        self.translateBlock();    }}- (CAShapeLayer *)drawMask:(CGFloat)x{    CAShapeLayer *shapeLayer = [CAShapeLayer layer];    shapeLayer.frame = self.bounds;        // 所以说CAShapeLayer 经常和 UIBezierPath相使用    shapeLayer.path = [self drawBezierPath:x].CGPath;    return shapeLayer;}- (UIBezierPath *)drawBezierPath:(CGFloat)x{    CGFloat radius = self.bounds.size.height/2 - 3;    CGFloat right = self.bounds.size.width-x;    CGFloat left = x;    UIBezierPath *bezierPath = [UIBezierPath bezierPath];    bezierPath.lineJoinStyle = kCGLineJoinRound;    bezierPath.lineCapStyle = kCGLineCapRound;        //右边圆弧    [bezierPath addArcWithCenter:CGPointMake(right, self.bounds.size.height/2) radius:radius startAngle:-M_PI/2 endAngle:M_PI/2 clockwise:YES];    //左边圆弧    [bezierPath addArcWithCenter:CGPointMake(left, self.bounds.size.height/2) radius:radius startAngle:M_PI/2 endAngle:-M_PI/2 clockwise:YES];    //闭合弧线    [bezierPath closePath];        return bezierPath;}- (UIBezierPath *)drawLoadingBezierPath{    CGFloat radius = self.bounds.size.height/2 - 3;    UIBezierPath *bezierPath = [UIBezierPath bezierPath];    [bezierPath addArcWithCenter:CGPointMake(0,0) radius:radius startAngle:M_PI/2 endAngle:M_PI/2+M_PI/2 clockwise:YES];    return bezierPath;}//画圆- (UIBezierPath *)drawclickCircleBezierPath:(CGFloat)radius{    UIBezierPath *bezierPath = [UIBezierPath bezierPath];    /**     *  center: 弧线中心点的坐标     radius: 弧线所在圆的半径     startAngle: 弧线开始的角度值     endAngle: 弧线结束的角度值     clockwise: 是否顺时针画弧线     *     */    [bezierPath addArcWithCenter:CGPointMake(0,0) radius:radius startAngle:0 endAngle:M_PI*2 clockwise:YES];    return bezierPath;}@end