iphone - 回転した画像に透明枠を追加しても枠がギザギザになる

Question

私のアプリでは、画像を回転させる必要があります。画像を回転させましたが、境界線がギザギザになっています。グーグルで調べたところ、透明な境界線を追加すると問題が解決することがわかりましたが、境界線はまだギザギザです。

私のコードは

-(void)CreateRotatedImage:(UIImage *)image Number:(int)Number    
            {    
                UIImage *ImageBackground=[UIImage imageNamed:@"white-highlight.png"];

CGSize ImageBackgroundSize = CGSizeMake(60, 50);
UIGraphicsBeginImageContext(ImageBackgroundSize);
CGRect ImageBackgroundRect = CGRectMake(0.0, 0.0, ImageBackgroundSize.width, ImageBackgroundSize.height);
[ImageBackground drawInRect:ImageBackgroundRect];
ImageBackground = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();



CGSize ImageSize = CGSizeMake(50, 40);
UIGraphicsBeginImageContext(ImageSize);
CGRect ImageRect = CGRectMake(0.0, 0.0, ImageSize.width, ImageSize.height);
[image drawInRect:ImageRect];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();





UIGraphicsBeginImageContext(CGSizeMake(60,50));
[ImageBackground drawAtPoint:CGPointMake(0,0)];
[image drawAtPoint:CGPointMake(5,5)];
// MyscrollView.backgroundColor = [UIColor clearColor];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();



UIImage *pin=[UIImage imageNamed:@"pin.png"];
UIGraphicsBeginImageContext(CGSizeMake(60,50));
[newImage drawAtPoint:CGPointMake(0,0)];
[pin drawAtPoint:CGPointMake(newImage.size.height/2,0)];
// MyscrollView.backgroundColor = [UIColor clearColor];
UIImage *IntermediateImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();



CGRect imageRrect = CGRectMake(0, 0, IntermediateImage.size.width, IntermediateImage.size.height);
UIGraphicsBeginImageContext( imageRrect.size ); 
[IntermediateImage drawInRect:CGRectMake(2,2,IntermediateImage.size.width-2,IntermediateImage.size.height-2)];    
   UIImage *i = UIGraphicsGetImageFromCurrentImageContext();  
    UIGraphicsEndImageContext();



CGSize iSize = CGSizeMake(110, 70);

UIGraphicsBeginImageContext(iSize);

CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetAllowsAntialiasing(context, YES);
 CGContextSetShouldAntialias(context, YES);
CGContextRotateCTM (context, radians(5));
[i drawAtPoint:CGPointMake(0, 0)];
UIImage *RotatedImage=UIGraphicsGetImageFromCurrentImageContext();

//RotatedImage=[RotatedImage resizedImage:iSize interpolationQuality:kCGInterpolationHigh];  


}