Get EXC_BAD_ACCESS when accessing image's properties returned by UIImagePickerController's didFinishPickingImage

Question

I'm working in the simulator right now and when trying to access the attributes of an image returned by UIImagePickerController's didFinishPickingImage, I get an EXC_BAD_ACCESS error:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
    NSLog(@"Image size: %@", img.size);
}

What am I doing wrong?

score 5 · Accepted Answer · answered Mar 14 '11 at 15:20

5

You are trying to print object ("%@" format specifier), but size has CGSize type which is typedef to plain struct. Use

NSLog(@"Image size: %@", NSStringFromCGSize(img.size));

or

NSLog(@"Image size: (%f, %f)", img.size.width, img.size.height);

answered Mar 14 '11 at 15:20

hoha

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+1 I wasn't aware of the [NSStringFromCGSize](http://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UIKitFunctionReference/Reference/reference.html#//apple_ref/c/func/NSStringFromCGSize) function, very cool. Prints size in the form {w,h} – theChrisKent Mar 14 '11 at 15:24

score 0 · Answer 2 · answered Mar 14 '11 at 15:14

0

UIImage.size is a structure, not an object, so you can't use %@ in NSLog to log it. Try this instead:

NSLog(@"Image size: %.0f %.0f", img.size.width, img.size.height);

answered Mar 14 '11 at 15:14

Greg

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score 0 · Answer 3 · answered Mar 14 '11 at 15:14

0

Do this instead:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
    NSLog(@"Image size: %f by %f", img.size.width, img.size.height);
}

answered Mar 14 '11 at 15:14

theChrisKent

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Get EXC_BAD_ACCESS when accessing image's properties returned by UIImagePickerController's didFinishPickingImage

3 Answers3