CODEWITHSUNDEEP
iosuiimage
some_id
some_id

Reputation: 29886

Scale down a UIImage

How does one scale down a UIImage equally on both dimensions by half?

I have a UIImage that is double the size of the UIImageView and would like it to be the same size, without using any of the content modes for filling or scaling etc.

Upvotes: 1

Views: 3107

Answers (1)

Tom
Tom

Reputation: 1349

Just make yourself a new image (expressed as a category method of UIImage) :

- (UIImage*)scaleToSize:(CGSize)size {
    UIGraphicsBeginImageContext(size);

    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextTranslateCTM(context, 0.0, size.height);
    CGContextScaleCTM(context, 1.0, -1.0);

    CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, size.width, size.height), self.CGImage);

    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return scaledImage;
}

Upvotes: 6

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