如何以編程方式爲iPhone5截圖？

我正在尋找我的應用程序中的圖像「保存」按鈕。問題是，iPhone 5和iPhone 4的圖像模糊。這是我現在使用的代碼。如何以編程方式爲iPhone5截圖？

爲iPhone 4和4S的用戶及其：

if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) 
{ 
    CGSize result = [[UIScreen mainScreen] bounds].size; 
    if(result.height == 480) 
    { 
     CGRect screenRect = [[UIScreen mainScreen] bounds]; 
     UIGraphicsBeginImageContext(screenRect.size); 
     CGContextRef ctx = UIGraphicsGetCurrentContext(); 
     [[UIColor blackColor] set]; 
     CGContextFillRect(ctx, screenRect); 
     [self.view.layer renderInContext:ctx]; 
     UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 


     CGImageRef imageRef = CGImageCreateWithImageInRect([img CGImage], CGRectMake (0, 20, self.view.bounds.size.width, (self.view.bounds.size.height - 40))); 

     //save photo to photoAlbum 
     UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Saved!" 
                  message:@"Image has been Saved, don't forget to Share!" 
                 delegate:nil 
               cancelButtonTitle:@"OK" 
               otherButtonTitles:nil]; 
     [message show]; 

     UIImage *image = [UIImage imageWithCGImage:imageRef]; 
     CGImageRelease(imageRef); 

     // Request to save the image to camera roll 
     UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);  }

對於iPhone 5的用戶，我有：

 if(result.height == 568) 
    { 
     CGRect screenRect = [[UIScreen mainScreen] bounds]; 

     if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) 
      UIGraphicsBeginImageContextWithOptions(screenRect.size, NO, [UIScreen mainScreen].scale); 
     else 
      UIGraphicsBeginImageContext(screenRect.size); 
     CGContextRef ctx = UIGraphicsGetCurrentContext(); 
     [[UIColor blackColor] set]; 
     CGContextFillRect(ctx, screenRect); 
     [self.view.layer renderInContext:ctx]; 
     UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 

     CGImageRef imageRef = CGImageCreateWithImageInRect([img CGImage], CGRectMake (0, 40, self.view.bounds.size.width, (self.view.bounds.size.height - 150))); 

     //save photo to photoAlbum 
     UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Saved!" 
                  message:@"Image has been Saved, don't forget to Share!" 
                 delegate:nil 
               cancelButtonTitle:@"OK" 
               otherButtonTitles:nil]; 
     [message show]; 

     UIImage *image = [UIImage imageWithCGImage:imageRef]; 
     CGImageRelease(imageRef); 
     // Request to save the image to camera roll 
     UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);  } 
}

來源

2012-12-14 paintball247