CGFloat值分配错误

Question

I am having a strange issue working on a new iOS (v7 SDK) app while working with CGFloat. A test photograph with dimensions 2448w X 3264h (saved in photographSize) is creating errors when I try to get its width and save it to a CGFloat. Here is how the code looks:

@property (weak, nonatomic) IBOutlet UIImageView *Photograph;
...
UIImage *photographImage = Photograph.image;
CGSize photographSize = [photographImage size];
...
CGFloat photoScale = photographSize.width;

photoScale is incorrectly being assigned the value 7.6500001 instead of 2448. What gives? Is this a sign of over/underflow happening? I have verified the values in photographSize to be 2448w X 3264h in the debugger. Also, Photograph is a UIImageView.

Thanks, I will monitor this thread throughout the day.

Answer 1

Maybe a mistake? Should be

CGSize photographScaledSize = Photograph.bounds.size;
CGFloat photoScale = photographScaledSize.width;
                               ^^^^^^

Answer 2

Update source code like below

CGFloat photoScale = photographSize.width;

to

CGFloat photoScale = photographScaledSize.width;

Answer 3

I used you code with my image and its working me fine. May be there is issue at assign image to UIImage *photographImage

    UIImage *photographImage = [UIImage imageNamed:@"7_normal.png"];
    CGSize photographSize = [photographImage size];
    CGFloat photoScale = photographSize.width;