Programmatically changing keyboard type on iOS does nothing

问题

I want to change keyboard type from default to numeric after user pressed return button. However after setting keyboardType property nothing happens.

My code:

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];

    return YES;
}

I have set myself as text field delegate and the method is being called after pressing return button.

EDIT: Solved by

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];
    [textField reloadInputViews];
    return YES;
}

回答1:

Try this:

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];
    [textField reloadInputViews];
    return YES;
}

回答2:

You can do this in the Text Input Traits section under the Attributes inspector.

来源：https://stackoverflow.com/questions/12619375/programmatically-changing-keyboard-type-on-ios-does-nothing