Resize UIImage and change the size of UIImageView

Question

I have this UIImageView and I have the values of its max height and max width. What I want to achieve is that I want to take the image (with any aspect ratio and any resolution) and I want it to fit in the borders, so the picture does not exceed them, but it can shrink them as it wants. (marked red in the picture):

Right now the image fits the necessary size properly, but I have 2 worries: 1. The UIImageView is not equal the size of the resized image, thus leaving red background (and I don't want that) 2. If the image is smaller that the height of my UIImageView it is not resized to be smaller, it stays the same height.

Here's my code and I know its wrong:

UIImage *actualImage = [attachmentsArray lastObject]; UIImageView *attachmentImageNew = [[UIImageView alloc] initWithFrame:CGRectMake(5.5, 6.5, 245, 134)]; attachmentImageNew.image = actualImage; attachmentImageNew.backgroundColor = [UIColor redColor]; attachmentImageNew.contentMode = UIViewContentModeScaleAspectFit; 

So how do I dynamically change the size not only of the UIImageView.image, but of the whole UIImageView, thus making its size totally adjustable to its content. Any help would be much appreciated, thanks!

Answer 1

When you get the width and height of a resized image Get width of a resized image after UIViewContentModeScaleAspectFit, you can resize your imageView:

imageView.frame = CGRectMake(0, 0, resizedWidth, resizedHeight); imageView.center = imageView.superview.center; 

I haven't checked if it works, but I think all should be OK

Answer 2

- (UIImage *)image:(UIImage*)originalImage scaledToSize:(CGSize)size {     //avoid redundant drawing     if (CGSizeEqualToSize(originalImage.size, size))     {         return originalImage;     }      //create drawing context     UIGraphicsBeginImageContextWithOptions(size, NO, 0.0f);      //draw     [originalImage drawInRect:CGRectMake(0.0f, 0.0f, size.width, size.height)];      //capture resultant image     UIImage *image = UIGraphicsGetImageFromCurrentImageContext();     UIGraphicsEndImageContext();      //return image     return image; }