UIImageView not resizing when bounds or frame is changed? - iphone

Question

So I have a custom view (its a custom textview that sits on top of keyboard); however it can resize so I would like the background image (UIImageView with UIImage inside of it) to scale with it. The following code does nothing:
//size of entire custom view
CGRect bFrame = self.keyboard.frame;
bFrame.origin.y += heightDifference;
bFrame.size.height += heightDifference;
//lets set frame and bounds for the uiimageview
self.keyboard.background.frame = bFrame;
self.keyboard.background.bounds = bFrame;
//I thought the lines above would work, but they didn't, trying to reset the image and change its content mode as a hack.. .still no beans.
self.keyboard.background.image = [UIImage imageNamed:#"keyboard_backgroundv1_5.png"];
self.keyboard.background.contentMode = UIViewContentModeScaleToFill;

Answer 1

This function may help you
CGSize targetSize = CGSizeMake(self.keyboard.frame.size.width, self.keyboard.frame.size.height);
self.keyboard.background.image = [self imageByScalingProportionallyToSize:targetSize ImageForConvert:[UIImage imageNamed:#"keyboard_backgroundv1_5.png"]];
-(UIImage *)imageByScalingProportionallyToSize:(CGSize)targetSize ImageForConvert:(UIImage *)sourceImage
{
UIImage *newImage = nil;
CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat targetWidth = targetSize.width;
CGFloat targetHeight = targetSize.height;
CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;
CGPoint thumbnailPoint = CGPointMake(0.0,0.0);
if (CGSizeEqualToSize(imageSize, targetSize) == NO)
{
CGFloat widthFactor = targetWidth / width;
CGFloat heightFactor = targetHeight / height;
if (widthFactor < heightFactor)
scaleFactor = widthFactor;
else
scaleFactor = heightFactor;
scaledWidth = width * scaleFactor*1;
scaledHeight = height * scaleFactor;
// center the image
if (widthFactor < heightFactor)
{
thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
} else if (widthFactor > heightFactor) {
thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
}
}
UIGraphicsBeginImageContext(targetSize);
CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width = scaledWidth;
thumbnailRect.size.height = scaledHeight;
[sourceImage drawInRect:thumbnailRect];
newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage ;
}