Question

I have an UIImage property, and after shooting image from iPhone camera I assigned image object to this property, otherwise not.
How can I check if this property contains image after shooting or not?
Below my code didn’t help.

@interface MyViewController : UIView<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
@property(nonatomic, retain) UIImage *imageShot;
@end

@implementation MyViewController
@synthesize imageShot = _imageShot;

- (id)init {
    self = [super init];
    if (self) {
        _imageShot = [[UiImage alloc] init];
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    self.imageShot = [info objectForKey:UIImagePickerControllerEditedImage];
}

- (void)buttonClick {
    if (_imageShot) {

    } 
    else {

    }
}

@end

Answer 1

In your init, you should create shotedImage with nil instead of alloc’ing a new, empty image. That’ll allow to perform tests like if (!shotedImage) (as nil == 0).