addGestureRecognizer is a method on UIView, not UIViewController.
Try
[self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(isTapped:)]];
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?
Solution
addGestureRecognizer is a method on UIView, not UIViewController.
Try
[self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(isTapped:)]];