第二次点击（有时）后出现文本框键盘

Question

I have one view in my app where there is 1 text field. And I've noticed that keyboard appears after second tap.

But it's interesting that on iPhone it's time to time (some time appears after first tap at once, and some time after second tap only). On iPad looks like it more ofter appears after second tap only.

• I use UITextFieldDelegate

• in viewDidLoad I assign the delegate _locationTextField.delegate = self;

• and I use delegate methods textFieldDidBeginEditing , textFieldDidEndEditing , textFieldShouldReturn

eg:

#pragma mark -
#pragma mark UITextFieldDelegate

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    _locationNameBeforeManualEdit = _locationTextField.text;
    // save the previod city value to compare after did end editing
    NSLog(@"textFieldDidBeginEditing");

}

- (void)textFieldDidEndEditing:(UITextField *)textField{
    NSLog(@"textFieldDidEndEditing");

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [self continueButtonPressed:nil];
    // [textField resignFirstResponder];
    return YES;
}

in storyboard

What could be the problem?

Answer 1

Found solution here on Stackoverflow - solution related with keyboard preload:

- (void)preloadKeyboard {
    UITextField *lagFreeField = [[UITextField alloc] init];
    [self.window addSubview:lagFreeField];
    [lagFreeField becomeFirstResponder];
    [lagFreeField resignFirstResponder];
    [lagFreeField removeFromSuperview]; 
}

This method should be used in application: didFinishLaunchingWithOptions: method of AppDelegate .