IOS 動畫實例詳解

iOS動畫的實現方式多種多樣，這裡就只記錄一下 beginAnimations:context 。

在你調用 beginAnimations:context:方法來啟動一個動畫後,動畫並不會立即被執行,直 到你調用 UIView 類的 commitAnimations 類方法。你對一個視圖對象執行的介於 beginAnimations:context:方法跟 commitAnimations方法之間的操作(例如移動)會在 commitAnimations 被執行後才會生效 。

實現效果圖：

代碼很簡單，直接貼了，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 voidvoid *)(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 

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