Question

I have a view controller. It is pushed by another’s UINavigationController.
In ViewController.m:

- (BOOL)canBecomeFirstResponder { 
    return YES;
}

- (void)viewDidAppear:(BOOL)animated {
    [self.view becomeFirstResponder];
    NSLog(@"%d", [self.view isFirstResponder]);
    [super viewDidAppear:animated];
}

It’s always 0. Why?

Answer 1

Your view has to accept first responder status. This is implemented in your view’s subclass code, you have to override canBecomeFirstResponderand return YES:

- (BOOL)canBecomeFirstResponder 
{ 
    return YES; 
}