scaling an image for a cell - ios

Question

I am trying to add image to cell, it works, but the scaling is not really working, the image is scaled to some size, and stay in that size, numbers i enter to the scale function don't change a thing .(image is auto scale to some constant size)
NSURL *url = [NSURL URLWithString:icon];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *logo=[UIImage imageWithData:data scale:4];
cell.imageView.layer.masksToBounds = YES;
cell.imageView.layer.cornerRadius = 10.0;
cell.imageView.image=logo;

Answer 1

Implement this method and use it:
/*! Returns a UIImage which is resized image of the image provided.
#param image
The image to be resized.
#param size
The size of the image to be resized.
*/
+ (UIImage*)resizeImage:(UIImage *)image imageSize:(CGSize)size {
CGFloat imageWidth = image.size.width;
CGFloat imageHeight = image.size.height;
CGFloat requiredWidth = (imageWidth * size.height) / imageHeight;
UIGraphicsBeginImageContextWithOptions(CGSizeMake(requiredWidth, size.height), NO, [UIScreen mainScreen].scale);
[image drawInRect:CGRectMake(0, 0, requiredWidth, size.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
//here is the scaled image which has been changed to the size specified
UIGraphicsEndImageContext();
return newImage;
}

Answer 2

Just write your masking function inside the custom cell class method declared as below.
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
// Configure the view for the selected state
[self.imageView.layer setCornerRadius:10.0];
self.imageView.layer.masksToBounds = YES;
}

Answer 3

Use this function to scale the images as per your requirement.
- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
//UIGraphicsBeginImageContext(newSize);
float theScaleFactor = 0.0f;
if ([[UIScreen mainScreen] respondsToSelector:#selector(scale)]) {
if ([[UIScreen mainScreen] scale] == 2.0) {
theScaleFactor = 2.0f;
} else {
theScaleFactor = 0.0f;
}
} else {
theScaleFactor = 0.0f;
}
UIGraphicsBeginImageContextWithOptions(newSize, NO, theScaleFactor);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Hope this will help you.