Why I cannot get correct class of a custom class through isKindOfClass?
- by Anthony Chan
Hi, I've created a custom class AnimalView which is a subclass of UIView containing a UILabel and a UIImageView.
@interface AnimalView : UIView {
UILabel *nameLabel;
UIImageView *picture;
}
Then I added in several AnimalView onto the ViewController.view. In the touchesBegan:withEvent: method, I wanted to detect if the touched object is an AnimalView or not. Here is the code for the viewController:
@implementation AppViewController
- (void)viewDidLoad {
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:...
[self.view addSubview scrollview];
for (int i = 0; i<10; i++) {
AnimalView *newAnimal = [[AnimalView alloc] init];
// customization of newAnimal
[scrollview addSubview:newAnimal;
}
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
UIView *hitView = touch.view;
if ([hitView isKindOfClass:[AnimalView class]]) {
AnimalView *animal = (AnimalView *)hitView;
[animal doSomething];
}
}
However, nothing happened when I clicked on the animal. When I checked the class of hitView by NSLog(@"%@", [hitView class]), it always shows UIView instead of AnimalView. Is it true that the AnimalView changed to a UIView when it is added onto the ViewController? Is there any way I can get back the original class of a custom class?
