的UIImageView旋轉和縮放在iPhone SDK

我執行使用的UIImageView縮放，旋轉，在我的項目，我現在面臨的問題在放大和旋轉圖像後縮小，的UIImageView旋轉和縮放在iPhone SDK

這裏是我的代碼如下：

在.h文件中

@interface ViewController : UIViewController{ 
float degrees; 
float height; 
float width; 

float moveLeft; 
float moveRight; 
} 

@property(nonatomic,retain)UIImageView *imageView; 

-(IBAction)rotationLeft:(id)sender; 
-(IBAction)rotationRight:(id)sender; 
-(IBAction)zoomIn:(id)sender; 
-(IBAction)zoomOut:(id)sender; 

-(IBAction)moveLeft:(id)sender; 
-(IBAction)moveRight:(id)sender;

在.m文件

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 



height=50; 
width=50; 
degrees=20; 
moveLeft=20; 
moveRight=20; 
imageView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"1.png"]]; 
imageView.frame=CGRectMake(100, 100,width, height); 
[self.view addSubview:imageView]; 



// Do any additional setup after loading the view, typically from a nib. 
} 
-(IBAction)rotationLeft:(id)sender{ 
//the value in degrees 
imageView.transform = CGAffineTransformMakeRotation(degrees*M_PI/180); 
degrees=degrees+25; 
} 

-(IBAction)rotationRight:(id)sender{ 
//the value in degrees 
degrees=degrees-25; 
imageView.transform = CGAffineTransformMakeRotation(degrees*M_PI/180); 

} 
-(IBAction)zoomIn:(id)sender{ 
height=height-15; 
width=width-15; 
imageView.frame=CGRectMake(100, 100,width, height); 
} 
-(IBAction)zoomOut:(id)sender{ 
height=height+15; 
width=width+15; 
imageView.frame=CGRectMake(100, 100,width, height); 
}

請參閱附件圖片以供參考。 enter image description here

來源

2012-07-19 VSN

它的縮放與否？ – Hiren 2012-07-19 10:53:55

其縮放但圖像像給定的參考圖像一樣伸展。 – VSN 2012-07-19 11:01:09

下面的代碼爲我工作完美！

-(IBAction)rotationLeft:(id)sender{ 
//the value in degrees 
    degrees=degrees+25; 
    CGAffineTransform t; 
    t=CGAffineTransformMakeScale(x, x); 
    // imageView.transform = CGAffineTransformMakeRotation(degrees*M_PI/180,x,x); 
    imageView.transform=CGAffineTransformRotate(t, degrees*M_PI/180); 
} 

-(IBAction)rotationRight:(id)sender{ 
    degrees=degrees-25; 
    CGAffineTransform t; 
    t=CGAffineTransformMakeScale(x, x); 
    imageView.transform=CGAffineTransformRotate(t, degrees*M_PI/180); 

} 
-(IBAction)zoomIn:(id)sender{ 
    x += 0.3; 
    CGAffineTransform t; 
    t=CGAffineTransformMakeRotation(degrees*M_PI/180); 
    imageView.transform=CGAffineTransformScale(t, x, x); 
} 

-(IBAction)zoomOut:(id)sender{ 
    x -= 0.3; 
    CGAffineTransform t; 
    t=CGAffineTransformMakeRotation(degrees*M_PI/180); 
    imageView.transform=CGAffineTransformScale(t, x, x); 
}

來源

2012-07-20 06:17:33 VSN

你應該使用CGAffineTransformMakeScale進行縮放的目的，而不是強迫的框架。

定義某處全球foal x = 1;則：

-(IBAction)zoomIn:(id)sender{ 
    x += 0.3; 
    imageView.transform = CGAffineTransformMakeScale(x, x); 
} 

-(IBAction)zoomOut:(id)sender{ 
    x -= 0.3; 
    imageView.transform = CGAffineTransformMakeScale(x, x); 
}

來源

2012-07-19 11:05:04

然後稍微用這個「0.3」值來獲得想要的縮放因子。 – 2012-07-19 11:09:29

Teodor，它應該是工作縮放，同時旋轉圖像...這裏是場景...如果我點擊縮放和縮小方法其工作正常...一段時間後，當我調用旋轉功能，圖像位置即將到來到正常而不是旋轉位置。 – VSN 2012-07-19 11:34:32

也許你重置某個地方的「度」值。確保它沒有被重置，並且確保它始終保持在0到360之間（例如，如果度數大於360，那麼度數= 0，反之如果它小於零，則度數= 360） – 2012-07-19 12:45:58

我會建議使用一個非常類似的方法，你有旋轉碼縮放圖像：

CGAffineTransformMakeScale(CGFloat sx, CGFloat sy);

只需把它超過1.0按比例放大並小於1.0以縮小比例;

來源

2012-07-19 11:06:18 Mazyod

的UIImageView旋轉和縮放在iPhone SDK

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