當鍵盤出現時向上移動UIView

Question

好吧，我已經經歷了關於SO和教程的幾乎所有問題。我現在可以將我的UIView向上移動，以便在打字時可以看到它。但問題是，如果UITextField被鍵盤覆蓋，我想要移動UIView只有，因爲如果不是，那麼在移動UIView時沒有意義。我的代碼到目前爲止：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    [[NSNotificationCenter defaultCenter] addObserver:self            selector:@selector(keyboardWillShow:) 
               name:UIKeyboardWillShowNotification 
               object:nil]; 

    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(keyboardWillHide:) 
               name:UIKeyboardWillHideNotification 
               object:nil]; 
} 

#pragma mark - keyboard movements 
- (void)keyboardWillShow:(NSNotification *)notification 
{ 
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; 

    [UIView animateWithDuration:0.3 animations:^{ 
     CGRect f = self.view.frame; 
     f.origin.y = -keyboardSize.height; 
     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; 
    }]; 
} 

任何幫助將不勝感激，謝謝。

Answer 1

是檢查的UITextField覆蓋鍵盤，你可以做這樣的事情：

- (void)keyboardWillShow:(NSNotification *)notification { 
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; 
    if (myTextField.frame.origin.y + myTextField.frame.size.height > [UIScreen mainScreen].bounds.size.height - keyboardSize.height) { 
     // textfield is covered by keyboard 
     [UIView animateWithDuration:0.3 animations:^{ 
      CGRect f = self.view.frame; 
      f.origin.y = -keyboardSize.height; 
      self.view.frame = f; 
     }]; 
    } 
}