How do i resize UIImages without the pain? [closed]

Answer 1

If you are talking about just the UIImage which doesnt contain metadata its just a matter of starting creating a graphics context and calling the uiimage draw in context method:

- (UIImage*)resizeImage:(UIImage*)jpeg withSize:(CGSize)newSize
{   
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [jpeg drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();    
    UIGraphicsEndImageContext();

    return resizedImage;
}

IF what you want is to resize images that contain metadata like read from the disk or something, perform the previews method and when re-saving use the original source dictionary.

Answer 2

I use the category shown here in https://stackoverflow.com/a/10491692/1271826 which is a category that provides UIImage a series of resizing methods, which effectively supports UIViewContentModeScaleToFill, UIViewContentModeScaleAspectFill, and UIViewContentModeScaleAspectFit.

I use this primarily for creating my thumbnail images (using my imageByScalingAspectFillSize) and do this with images of varying formats without incident.