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(0, 0, 100, 40);
    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:3];
    
//    ..... 动画效果
    imageView.alpha = 0.5;
    imageView.bounds = CGRectMake(0, 0, 100, 100);
    imageView.center = CGPointMake(50, 200);
//    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:3];
    imageView.alpha = 0.1;
    imageView.bounds = CGRectZero;
    imageView.center = CGPointMake(100, 100);
    
    [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:3];
//    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:3 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：