ios - 出现键盘时如何移动 View

Question

我有多个 UITextFields，我需要在键盘出现时向上移动 View 。但我只需要 3 个底部字段，并且不想移动顶部其他字段的 View 。我使用这段代码，但是当用户点击每个字段时它会移动 View ，而我只需要在用户点击 2 个底部字段时移动 View

- (void)viewWillAppear:(BOOL)animated {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)viewWillDisappear:(BOOL)animated {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

#pragma mark - keyboard movements
- (void)keyboardWillShow:(NSNotification *)notification
{
    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = -115.0f;  //set the -35.0f to your required value
        self.view.frame = f;
    }];
}

-(void)keyboardWillHide:(NSNotification *)notification
{
    [UIView animateWithDuration:0.3 animations:^{
        CGRect f = self.view.frame;
        f.origin.y = 0.0f;
        self.view.frame = f;
    }];
}

Answer 1

您可以更改任何 UIView、UIButton 的框架....在 UITextfield 委托(delegate)方法 textFieldDidBeginEditing 中:当您点击文本字段时，该委托(delegate)将调用

 - (void)textFieldDidBeginEditing:(UITextField *)textField{ 

      //here you will get the selected textfield
      //check whether the textfield is equal to any of three bottom field
       if(textfield==BottomTextfield)
       {
            //here you can change the frame of the UIViews
       }
   }