iOS'ViewController'的可见@interface没有声明选择器addGestureRecognizer错误

Question

I'm trying to add the gesture recognizer to the main view but I'm getting this error:

No visible @interface for 'ViewController' declares the selector addGestureRecognizer error

on this line:

 [self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self.view action:@selector(isTapped:)]];

any of you knows why of the error or how can I fix this error?

Answer 1

addGestureRecognizer is a method on UIView, not UIViewController.

Try

    [self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(isTapped:)]];