Show done button for UITextView

keyboard.m

// Add toolbar to above keyboard
UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)];
    numberToolbar.barStyle = UIBarStyleBlackTranslucent;
    numberToolbar.items = [NSArray arrayWithObjects:
                           [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                           [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)],
                           nil];
    [numberToolbar sizeToFit];
    _tvContent.inputAccessoryView = numberToolbar;



// Action when click done 
- (void) doneWithNumberPad{
    [_tvContent resignFirstResponder];
}

// Doi voi TextField thì có thể trực tiếp hiện nút done ở keyboard 
_tfTitle.returnKeyType = UIReturnKeyDone;

// Sau do 
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    //eturn YES;
    // [self.view endEditing:YES];
    [textField resignFirstResponder];
    return YES;
}

// Remember : controller phai implement TextFieldDelegate
textField.delegate =self