Format specifies type 'int' but the argument has type 'UIViewContentMode'

Question

I am getting a warning in Xcode:

Format specifies type 'int' but the argument has type 'UIViewContentMode'

I have a method that I am using to resize an UIImage as follows:

- (UIImage *)resizedImageWithContentMode:(UIViewContentMode)contentMode
                                  bounds:(CGSize)bounds
                    interpolationQuality:(CGInterpolationQuality)quality {
    CGFloat horizontalRatio = bounds.width / self.size.width;
    CGFloat verticalRatio = bounds.height / self.size.height;
    CGFloat ratio;

    switch (contentMode) {
        case UIViewContentModeScaleAspectFill:
            ratio = MAX(horizontalRatio, verticalRatio);
            break;

        case UIViewContentModeScaleAspectFit:
            ratio = MIN(horizontalRatio, verticalRatio);
            break;

        default:
            [NSException raise:NSInvalidArgumentException format:@"Unsupported content mode: %d", contentMode];
    }
...

UIViewContentMode seems to reference an Integer so I am not sure on this warning:

typedef NS_ENUM(NSInteger, UIViewContentMode) {
    UIViewContentModeScaleToFill,
    UIViewContentModeScaleAspectFit,      // contents scaled to fit with fixed aspect. remainder is transparent
    UIViewContentModeScaleAspectFill, ... 

How can I get rid of this warning it seems to be incorrect? Is the NSLog in the exception correct?

Answer 1

You can cast the NSInteger UIViewContentMode to an int like this:

[NSException raise:NSInvalidArgumentException format:@"Unsupported content mode: %d", (int)contentMode];