1.将动画的所有方法封装到一个类里面MyCAHelper.h#import#import #define kCAHelperAlphaAnimation @"opacity"; // 淡入淡出动画#define kCAHelperScaleAnimation @"transform.scale"; // 比例缩放动画#define kCAHelperRotationAnimation @"transform.rotation"; // 旋转动画#define kCAHelperPositionAnimation @"position"; // 平移位置动画@interface MyCAHelper : NSObject#pragma mark - 基本动画统一调用方法+ (CABasicAnimation *)myBasicAnimationWithType:(NSString *)animationTypeduration:(CFTimeInterval)durationfrom:(NSValue *)fromto:(NSValue *)toautoRevereses:(BOOL)autoRevereses;#pragma mark - 关键帧动画方法#pragma mark 摇晃动画+ (CAKeyframeAnimation *)myKeyShakeAnimationWithDuration:(CFTimeInterval)durationangle:(CGFloat)anglerepeatCount:(CGFloat)repeatCount;#pragma mark 贝塞尔路径动画+ (CAKeyframeAnimation *)myKeyPathAnimationWithDuration:(CFTimeInterval)durationpath:(UIBezierPath *)path;#pragma mark 弹力仿真动画+ (CAKeyframeAnimation *)myKeyBounceAnimationFrom:(CGPoint)fromto:(CGPoint)toduration:(CFTimeInterval)duration;@endMyCAHelper.m#import "MyCAHelper.h"@implementation MyCAHelper#pragma mark - 基本动画统一调用方法+ (CABasicAnimation *)myBasicAnimationWithType:(NSString *)animationTypeduration:(CFTimeInterval)durationfrom:(NSValue *)fromto:(NSValue *)toautoRevereses:(BOOL)autoRevereses{ // 1. 实例化一个CA动画对象 CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:animationType]; // 2. 设置动画属性 [anim setDuration:duration]; [anim setFromValue:from]; [anim setToValue:to]; [anim setAutoreverses:autoRevereses]; return anim;}#pragma mark - 关键帧动画方法#pragma mark 摇晃动画+ (CAKeyframeAnimation *)myKeyShakeAnimationWithDuration:(CFTimeInterval)durationangle:(CGFloat)anglerepeatCount:(CGFloat)repeatCount{ // 1. 初始化动画对象实例 CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation"]; // 2. 设置动画属性 [anim setDuration:duration]; [anim setValues:@[@(angle), @(-angle), @(angle)]]; [anim setRepeatCount:repeatCount]; return anim;}#pragma mark 贝塞尔路径动画+ (CAKeyframeAnimation *)myKeyPathAnimationWithDuration:(CFTimeInterval)durationpath:(UIBezierPath *)path{ // 1. 初始化动画对象实例 CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:@"position"]; // 2. 设置动画属性 [anim setDuration:duration]; [anim setPath:path.CGPath]; return anim;}#pragma mark 弹力仿真动画+ (CAKeyframeAnimation *)myKeyBounceAnimationFrom:(CGPoint)fromto:(CGPoint)toduration:(CFTimeInterval)duration{ // 是一个基于路径的动画 // 首先定义一个路径，记录弹力仿真的整个路径 CGMutablePathRef path = CGPathCreateMutable(); // 弹力仿真路径创建代码 // 计算起始点与目标点之间的位置偏移量，这个偏移量的目的是为了能够计算出小球第一次延伸的长度 CGFloat offsetX = from.x - to.x; CGFloat offsetY = from.y - to.y; // 1. 移动到起始点 CGPathMoveToPoint(path, NULL, from.x, from.y); // 2. 将目标点的坐标添加到路径之中 CGPathAddLineToPoint(path, NULL, to.x, to.y); // 3. 设置小球的弹力因子 CGFloat offsetDivider = 4.0f; while (YES) { // 加延伸方向的路径 CGPathAddLineToPoint(path, NULL, to.x + offsetX / offsetDivider, to.y + offsetY / offsetDivider); // 再次将目标点添加到路径 CGPathAddLineToPoint(path, NULL, to.x, to.y); // 弹力因子递增，保证越来越接近目标点 offsetDivider += 6.0f; // 当小球的当前位置距离目标点足够小，我们退出循环 if ((abs(offsetX / offsetDivider) < 10.0f) && (abs(offsetY / offsetDivider) < 10.0f)) { break; } } CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:@"position"]; [anim setPath:path]; // 释放路径 CGPathRelease(path); [anim setDuration:duration]; return anim;}@end#import "ViewController.h"#import "MyCAHelper.h"@interface ViewController (){ UIView *_demoView; CGPoint location;}@end@implementation ViewController- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. [self.view setBackgroundColor:[UIColor lightGrayColor]]; _demoView = [[UIView alloc]initWithFrame:CGRectMake(50, 50, 100, 100)]; [_demoView setBackgroundColor:[UIColor whiteColor]]; [self.view addSubview:_demoView];}- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ UITouch *touch = [touches anyObject]; location = [touch locationInView:self.view]; // [_demoView setCenter:location]; /** 1.测试基本动画 */ // CABasicAnimation *anim = [self testBasic1]; // [anim setRepeatCount:3]; // // [_demoView.layer addAnimation:anim forKey:nil]; /** 2.测试弹力仿真动画效果 */ // [_demoView.layer addAnimation:[self test1:_demoView.center to:location] forKey:nil]; /** 3.测试路径关键帧动画 */ // [_demoView.layer addAnimation:[self test2] forKey:nil]; // [_demoView.layer addAnimation:[self test4:_demoView.center to:location] forKey:nil]; /** 4.测试摇晃关键帧动画 */ // 点击屏幕，开始摇晃，再次点击，停止摇晃 // CAAnimation *anim = [_demoView.layer animationForKey:@"shakeAnimation"]; // if (anim) { // [_demoView.layer removeAnimationForKey:@"shakeAnimation"]; // } else { // [_demoView.layer addAnimation:[self test5] forKey:@"shakeAnimation"]; // } CAKeyframeAnimation *anim = [self test1:_demoView.center to:location]; [_demoView.layer addAnimation:anim forKey:nil];}-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{ // 需要在这里对不同对象的动画方法进行完成处理！ [_demoView setCenter:location]; NSLog(@"%@", NSStringFromCGPoint(_demoView.center));}#pragma mark - 重构方法测试#pragma mark 测试贝塞尔路径关键帧动画- (CAKeyframeAnimation *)test5{ return [MyCAHelper myKeyShakeAnimationWithDuration:0.2 angle:M_PI_4 / 18 repeatCount:MAXFLOAT];}#pragma mark 测试贝塞尔路径关键帧动画- (CAKeyframeAnimation *)test4:(CGPoint)from to:(CGPoint)to{ UIBezierPath *path = [UIBezierPath bezierPath]; // 有两个控制点去挤出的曲线，能挤出S型的曲线 [path moveToPoint:from]; [path addCurveToPoint:to controlPoint1:CGPointMake(320, 0) controlPoint2:CGPointMake(0, 460)]; return [MyCAHelper myKeyPathAnimationWithDuration:2.0 path:path];}#pragma mark 测试贝塞尔路径关键帧动画- (CAKeyframeAnimation *)test3:(CGPoint)from to:(CGPoint)to{ UIBezierPath *path = [UIBezierPath bezierPath]; // 只有一个控制点去挤出的曲线 [path moveToPoint:from]; [path addQuadCurveToPoint:to controlPoint:CGPointMake(320, 230)]; return [MyCAHelper myKeyPathAnimationWithDuration:2.0 path:path];}#pragma mark 测试路径关键帧动画- (CAKeyframeAnimation *)test2{ UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(100, 100, 100, 100)]; return [MyCAHelper myKeyPathAnimationWithDuration:2.0 path:path];}#pragma mark 测试弹力仿真动画效果- (CAKeyframeAnimation *)test1:(CGPoint)from to:(CGPoint)to{ CAKeyframeAnimation *anim = [MyCAHelper myKeyBounceAnimationFrom:from to:to duration:1.5]; [anim setFillMode:kCAFillModeForwards]; [anim setRemovedOnCompletion:NO]; [anim setDelegate:self]; return anim;}- (CABasicAnimation *)testBasic1{ return [MyCAHelper myBasicAnimationWithType:@"opacity" duration:1.0 from:@(1.0) to:@(0.3) autoRevereses:YES];}@end
一、核心动画概念
－导入QuartzCore.framework框架
1⃣ 开发步骤
1.初始化一个动画对象（CAAnimation）并且设置一些动画相关属性2.CALayer中很多属性都可以通过CAAnimation实现动画效果，包括：opacity、position、transform、bounds、contents等（可以在API文档中搜索：CALayer Animatable Properties）
3.添加动画对象到层（CALayer）中，开始执行动画
4.通过调用CALayer的addAnimation：forKey增加动画到层（CALayer）中，这样就能触发动画。通过调用removeAnimationForKey可以停止层中的动画
5.Core Animation的动画执行过程都是后台操作的，不会阻塞主线程
2⃣ 属性
1.duration：动画的持续时间2.repeatCount：重复次数（HUGE_VALF、MAX FLOAT无限重复）
3.repeatDuration：重复时间（用的很少）
4.removedOnCompletion：默认为Yes。动画执行完后默认会从图层删除掉
5.fillMode
6.biginTime7.timingFunction：速度控制函数，控制动画节奏8.delegate
二、基础动画（CABasicAnimation）如果只是实现简单属性变化的动画效果，可以使用UIView的块动画替代基本动画1⃣ 属性说明
－fromValue：keyPath相应属性值的初始值－toValue：keyPath相应属性的结束值
2⃣ 动画过程说明：
－随着动画的就行，在duration的持续时间内，keyPath相应的属性值从fromValue渐渐变为toValue
－keyPath内容是CALayer的可动画Animation属性
－如果fillMode＝kCAFillModeForwards同时removedOnCompletion＝NO，那么在动画执行完毕后，图层会保持显示动画执行后的状态，但在实质上，图层的属性值还是动画执行前的初始值，并没有真正改变
3⃣ 代码实现
位移需要考虑目标点设定的问题
三、关键帧动画（CAKeyframeAnimation）
基础动画只能从一个值到另一个值，关键帧动画可以用一个数组保存一系列值
1⃣ 属性说明
－values：所有的值（用的较少）－path：路线（如果设置了path，那么values将被忽略）
－keyTimes：可以为对应的关键帧制定对应的时间点，取值范围是0到1.0
2⃣ 过程步骤
－初始化自定义视图－点击屏幕，执行动画
1.指定点平移动画（values）
2.路径平移动画（path C语言框架CGMutablePathRef，需要手动释放内存）
3.贝塞尔路径动画（OC框架UIBezierPath）
4.摇晃动画（修改旋转角度）
3⃣ 代码重构
如上代码，重构在了一起四、动画组
动画是可以并发执行的－定义一个group组
－定义动画
－将动画加入group组－可以给组设置属性
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ UITouch *touch = [touches anyObject]; CGPoint location = [touch locationInView:self.view]; [_demoView setBackgroundColor:[UIColor redColor]]; // 1. 定义动画组 CAAnimationGroup *group = [CAAnimationGroup animation]; // 定义一组动画 // 淡入淡出动画 CABasicAnimation *alpha = [MyCAHelper myBasicAnimationWithType:kCAHelperAlphaAnimation duration:1.0 from:@(1.0) to:@(0.3) autoRevereses:YES]; // 旋转动画 CABasicAnimation *rotation = [MyCAHelper myBasicAnimationWithType:kCAHelperRotationAnimation duration:2.0 from:@(-M_PI_2) to:@(M_PI_2) autoRevereses:NO]; // 缩放动画 CABasicAnimation *scale = [MyCAHelper myBasicAnimationWithType:kCAHelperScaleAnimation duration:0.5 from:@(1.0) to:@(0.1) autoRevereses:YES]; // 关键帧路径动画，弹力仿真动画效果 CAKeyframeAnimation *path = [self test1:_demoView.center to:location]; // 2. 设置动画组属性 [group setAnimations:@[alpha, path, rotation, scale]]; // 设置动画的时长 [group setDuration:4.0]; // 3. 将动画组添加到图层 [_demoView.layer addAnimation:group forKey:nil];} 五、转场动画－CATransition
1⃣属性说明－type：动画过渡类型－subtype：动画过渡方向
－startProgress：动画起点（在整体动画的百分比）
－endProgress：动画终点（在整体动画的百分比）
－增加一个转场演示视图
－增加轻扫手势
－在轻扫手势方法中1.更改演示视图内容
2.创建转场动画效果
3.将转场动画添加到视图的图层
// 轻扫手势操作- (void)swipeAction:(UISwipeGestureRecognizer *)sender{ // 通过轻扫手势，让切换出来的视图是蓝色的 if (_demoView.tag == 0) { [_demoView setBackgroundColor:[UIColor blueColor]]; [_demoView setTag:1]; } else { [_demoView setBackgroundColor:[UIColor redColor]]; [_demoView setTag:0]; } // 根据视图内容我们来实现专场动画 CATransition *anim = [CATransition animation]; // 设置专场动画的过渡类型 [anim setType:@"cameraIrisHollowClose"]; // 需要根据手势的方向，来决定专场动画的动画方向 // 注意：在转场动画中，动画方向的左右是和手势的方向相反的 if (sender.direction == UISwipeGestureRecognizerDirectionLeft) { [anim setSubtype:kCATransitionFromRight]; } else { [anim setSubtype:kCATransitionFromLeft]; } [_demoView.layer addAnimation:anim forKey:nil];}- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // 1. 实例化自定义视图 _demoView = [[UIView alloc]initWithFrame:self.view.bounds]; [_demoView setBackgroundColor:[UIColor redColor]]; [self.view addSubview:_demoView]; // 2. 增加轻扫手势 UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)]; [swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft]; [_demoView addGestureRecognizer:swipeLeft]; UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)]; [swipeRight setDirection:UISwipeGestureRecognizerDirectionRight]; [_demoView addGestureRecognizer:swipeRight];} 六、UIView的转场动画－双视图
+(void)transitionWithView:(UIView*)view duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void(^)(void))animations completion:(void(^)(BOOL finished))completion;1⃣参数说明－duration：动画的持续时间－view：需要进行转场动画的视图－options：转场动画的类型－animations：将改变视图属性的代码放在这个Block里－completion：动画结束后，自动调用的Block@interface ViewController (){ UIImageView *_demoImageView; UIImageView *_demoImageView2;}@end@implementation ViewController- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // 实例化第一个UIImageView的对象 _demoImageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"1.jpg"]]; [self.view addSubview:_demoImageView]; // 实例化第二个UIImageView对象 // 注意：在双视图转场动画中，不要将第二个视图添加到主视图 _demoImageView2 = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"2.jpg"]];}- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ // 单击屏幕的时候，实现转场动画效果 [self animation1];}#pragma mark - 单视图的转场动画- (void)animation2{ UIImageView *from; UIImageView *to; if (_demoImageView.superview) { from = _demoImageView; to = _demoImageView2; } else { from = _demoImageView2; to = _demoImageView; } [UIView transitionFromView:from toView:to duration:1.0f options:UIViewAnimationOptionTransitionCrossDissolve completion:^(BOOL finished) { NSLog(@"image view1 的主视图： %@", _demoImageView.superview); NSLog(@"image view2 的主视图： %@", _demoImageView2.superview); }];}#pragma mark - 单视图的转场动画- (void)animation1{ [UIView transitionWithView:_demoImageView duration:1.0f options:UIViewAnimationOptionTransitionCurlUp animations:^{ // 在动画块代码中设置视图内容变化 if (_demoImageView.tag == 0) { [_demoImageView setImage:[UIImage imageNamed:@"2.jpg"]]; [_demoImageView setTag:1]; } else { [_demoImageView setImage:[UIImage imageNamed:@"1.jpg"]]; [_demoImageView setTag:0]; } } completion:nil];}