CoreAnimation 核心动画一 （一些常用属性 和 方法）

1、常用属性：

frame   bounds   center   alpha    Transition 过渡    transform 动画效果

2、常用方法：

+(void)setAnimationDelegate:(id)delegate;

+(void)setAnimationWillStartSelector:(SEL)selector; 当动画结束的时候，执行delegate对象的selector，并且把beginAnimations:context:中传入的参数传进selector

+ (void)setAnimationDidStopSelector:(SEL)selector;  当动画结束时，执行delegate对象的selector，并且把beginAnimations:context:中传入的参数传进selector

+ (void)setAnimationDuration:(NSTimeInterval)duration;   动画的持续时间，秒为单位

+ (void)setAnimationDelay:(NSTimeInterval)delay;  动画延迟delay秒后再开始

+ (void)setAnimationStartDate:(NSDate *)startDate;   动画的开始时间，默认为now

+ (void)setAnimationCurve:(UIViewAnimationCurve)curve;  动画的节奏控制(过渡)

+ (void)setAnimationRepeatCount:(float)repeatCount;  动画的重复次数

+ (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses;  如果设置为YES,代表动画每次重复执行的效果会跟上一次相反

+ (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache;  设置视图view的过渡效果, transition指定过渡类型, cache设置YES代表使用视图缓存，性能较好

 #import "ViewController.h"

 @interface ViewController ()
 {
     UIImageView *imageView;
 }
 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     imageView = [[UIImageView alloc]initWithFrame:self.view.frame];
     imageView.image = [UIImage imageNamed:@"7.jpg"];
 //    imageView.contentMode = UIViewContentModeScaleAspectFit;
     [self.view addSubview:imageView];

     UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
     button.frame = CGRectMake(, , , );
     button.center = self.view.center;
     button.backgroundColor = [UIColor brownColor];
     [button addTarget:self action:@selector(viewAnimation3) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:button];

 }

 #pragma mark -- 1、frame bounds center alpha ---
 - (void)viewAnimation1 {
 #pragma mark - 方法1
 //    在一段时间内 执行完命令
 //    [UIView animateWithDuration:3 animations:^{
 //        imageView.alpha = 0.5;
 //    }];

 #pragma mark - 方法2
 //  开始动画
     [UIView beginAnimations:@"animation" context:nil];

 //    这只动画的持续时间
     [UIView setAnimationDuration:];

 //    ..... 动画效果
     imageView.alpha = 0.5;
     imageView.bounds = CGRectMake(, , , );
     imageView.center = CGPointMake(, );
 //    imageView.frame = CGRectMake(100, 100, 100, 100);

 //    提交动画  会去执行动画
     [UIView commitAnimations];
 }

 #pragma mark - 2、Transition
 /*
  typedef NS_ENUM(NSInteger, UIViewAnimationTransition) {
  UIViewAnimationTransitionNone,
  UIViewAnimationTransitionFlipFromLeft, 从左面翻转
  UIViewAnimationTransitionFlipFromRight,从右面翻转
  UIViewAnimationTransitionCurlUp, 向上翻页
  UIViewAnimationTransitionCurlDown,向下翻页
  };
  */
 - (void)viewAnimation2 {
 //    开始动画
     [UIView beginAnimations:nil context:nil];
 //    设置动画持续时间
 //    [UIView setAnimationDuration:3];
 //    设置 UIView 的过渡动画
     [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:imageView cache:YES];

 #pragma mark - 3、UIViewAnimationCurve
     /*
      typedef NS_ENUM(NSInteger, UIViewAnimationCurve) {
      UIViewAnimationCurveEaseInOut,         // slow at beginning and end  慢进慢出
      UIViewAnimationCurveEaseIn,            // slow at beginning  快进
      UIViewAnimationCurveEaseOut,           // slow at end  快出
      UIViewAnimationCurveLinear   匀速
      };
      */
     [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
 //    设置 代理（检测动画结束）
     [UIView setAnimationDelegate:self];
     [UIView setAnimationDidStopSelector:@selector(finishAnimation)];
 //    提交动画
     [UIView commitAnimations];

 }

 //  动画结束之后触发的方法
 - (void)finishAnimation {
     [UIView beginAnimations:@"o" context:nil];
     [UIView setAnimationDuration:];
     imageView.alpha = 0.1;
     imageView.bounds = CGRectZero;
     imageView.center = CGPointMake(, );

     [UIView commitAnimations];
 }

 #pragma mark - 4、transform
 /*
  imageView.transform=CGAffineTransformScale(imageView.transform, 0.5, 0.5); // 实现的是放大和缩小imageView.transform=CGAffineTransformRotate(imageView.transform, M_PI_4); //实现的是旋转 imageView.transform=CGAffineTransformTranslate(imageView.transform, 20, 0); //实现的是平移
  */
 - (void)viewAnimation3 {

     [UIView beginAnimations:@"animation" context:nil];
     [UIView setAnimationDuration:];
 //    transform 如果没有还原transform 他会保持 改变后的模样
     imageView.transform = CGAffineTransformScale(imageView.transform, 0.5, 0.5);

     [UIView setAnimationDelegate:self];
     [UIView setAnimationDidStopSelector:@selector(restore)];
     [UIView commitAnimations];

 }

 - (void)restore {
     [UIView animateWithDuration: animations:^{
         imageView.transform = CGAffineTransformIdentity;

     }];
 }

模拟器效果截图：

方法一效果图：

方法二效果图：

方法三效果图：