在你调用 beginAnimations:context:方法来启动一个动画后,动画并不会立即被执行,直 到你调用 UIView 类的 commitAnimations 类方法。你对一个视图对象执行的介于 beginAnimations:context:方法跟 commitAnimations方法之间的操作(例如移动)会在 commitAnimations 被执行后才会生效 。

代码很简单，直接贴了，如下：

//
//  ViewController.m
//  Graphics
//
//  Created by aaron on 14b-5-29.
//  Copyright (c) 2014年 The Technology Studio. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property(nonatomic,strong) UIImageView *imageView1;
@property(nonatomic,strong) UIImageView *imageView2;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UIImage *image = [UIImage imageNamed:@"1.png"];
    self.imageView1 = [[UIImageView alloc] initWithImage:image];
    self.imageView2 = [[UIImageView alloc] initWithImage:image];
    [self.imageView1 setFrame:CGRectMake(0.0f,
                                         0.0f,
                                         100.0f,
                                         100.0f)];
   
    [self.imageView2 setFrame:CGRectMake(220.0f,
                                         350.0f,
                                         100.0f,
                                         100.0f)];
    [self.view addSubview:self.imageView1];
    [self.view addSubview:self.imageView2];
    
//    [self startTopLeftImageViewAnimation];
//    [self startBottomRightViewAnimationAfterDelay:2];
    [self affineTransformScaleAnimation];
    [self affineTransformRotateAnimation];
    
}

//imageView2 animation
-(void)startTopLeftImageViewAnimation{
    [self.imageView1 setFrame:CGRectMake(0.0f,
                                         0.0f,
                                         100.0f,
                                         100.0f)];
    [self.imageView1 setAlpha:1.0f];
    [UIView beginAnimations:@"imageView1Animation" context:(__bridge void*)self.imageView1];
    [UIView setAnimationDuration:3.0f];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(imageViewDidStop:finished:context:)];
    [self.imageView1 setFrame:CGRectMake(220.0f, 350.0f, 100.0f, 100.0f)];
    [self.imageView1 setAlpha:0.0f];
    [UIView commitAnimations];
}

-(void)imageViewDidStop:(NSString*)paramAnimationID finished:(NSNumber*)paramFinished context:(void*)paramContext{
    NSLog(@"AnimationID = %@\n",paramAnimationID);
    UIImageView *contextImageView = (__bridge UIImageView *)(paramContext);
    NSLog(@"contextImageView = %@",contextImageView);
    [contextImageView removeFromSuperview];
}


//imageView2 animation
-(void)startBottomRightViewAnimationAfterDelay:(CGFloat)paramDelay{
    [self.imageView2 setFrame:CGRectMake(220.0f,
                                         350.0f,
                                         100.0f,
                                         100.0f)];
    [self.imageView2 setAlpha:1.0f];
    [UIView beginAnimations:@"imageView2Animation" context:(__bridge void *)(self.imageView2)];
    [UIView setAnimationDuration:3.0f];
    [UIView setAnimationDelay:paramDelay];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(imageViewDidStop:finished:context:)];
    [self.imageView2 setFrame:CGRectMake(0.0f, 0.0f, 100.0f, 100.0f)];
    [self.imageView2 setAlpha:0.0f];
    [UIView commitAnimations];
}


//imageView1 AffineTransformScale animation
-(void)affineTransformScaleAnimation{
    self.imageView1.center = self.view.center;
    self.imageView1.transform = CGAffineTransformIdentity;
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:5.0f];
    self.imageView1.transform = CGAffineTransformMakeScale(2.0f, 2.0f);
    [self.imageView1 setAlpha:0.0f];
    [UIView commitAnimations];
}

//imageView2 AffineTransformRotate animation
-(void)affineTransformRotateAnimation{
    self.imageView2.center = self.view.center;
    [UIView beginAnimations:@"clockwiseAnimation" context:NULL];
    [UIView setAnimationDuration:5.0f];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(clockwiseRotationStopped:finished:context:)];
    self.imageView2.transform = CGAffineTransformMakeRotation(90.0f*M_PI/180.f);
    [UIView commitAnimations];
}


-(void)clockwiseRotationStopped:(NSString*)paramAnimationID finished:(NSNumber*)paramFinished context:(void*)paramContext{
    [UIView beginAnimations:@"counterclockwiseAnimation" context:NULL];
    [UIView setAnimationDuration:5.0f];
    self.imageView2.transform = CGAffineTransformIdentity;
    [UIView commitAnimations];
}

@end