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NavigationControllerにTextFieldを含むツールバーを追加しました

- (void)viewDidLoad
{
    // ...

    [self.navigationController setToolbarHidden:NO animated:YES];

    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 2, 240, 36)];
    textField.placeholder = @"Leave your comment here...";
    textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

    UIBarButtonItem *commentTextFieldBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:textField];

    self.toolbarItems = [NSArray arrayWithObject:commentTextFieldBarButtonItem];
}

ユーザーがTextFieldをクリックすると、ツールバーがキーボードとともに上に移動することを願っています。私はこの方法を試しました。ツールバーは上に移動しましたが、空になりました。私は何か間違ったことをしていますか？助けてください、ありがとう！

スクリーンショット1-前

スクリーンショット2-後

4

1 に答える 1

3

最善の解決策は、次のように設定inputAccessoryViewすることUITextFieldです。

#pragma mark - UITextFieldDelegate

-(void)textFieldDidBeginEditing:(UITextField *)textField{
   // Call the createInputAccessoryView method we created earlier.
   // By doing that we will prepare the inputAccView.

   UIView *inputAccView = [self createInputAccessoryView];
      // Now add the view as an input accessory view to the selected textfield.
   [textField setInputAccessoryView:inputAccView];  
}

-(UIView *)createInputAccessoryView{
  // Create the view that will play the part of the input accessory view.
  // Note that the frame width (third value in the CGRectMake method)
  // should change accordingly in landscape orientation. But we don’t care
  // about that now.
  UIView *inputAccView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 40.0)];
  // Set the view’s background color. We’ ll set it here to gray. Use any color you want.
  [inputAccView setBackgroundColor:[[UIColor blackColor] colorWithAlphaComponent:0.20f]];
  // We can play a little with transparency as well using the Alpha property. Normally
  // you can leave it unchanged.
  [inputAccView setAlpha: 0.8];

  UIButton *btnDone = [UIButton buttonWithType:UIButtonTypeCustom];
  [btnDone setFrame:CGRectMake(240.0, 6.0f, 70.0f, 28.0f)];
  [btnDone setTitle:@"Done" forState:UIControlStateNormal];
  [btnDone setBackgroundColor:[UIColor blackColor]];
  [btnDone.layer setCornerRadius:6.0f];
  [btnDone setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
  [btnDone addTarget:self action:@selector(btnDoneForKeyboardAction:) forControlEvents:UIControlEventTouchUpInside];
  // Now that our buttons are ready we just have to add them to our view.
  [inputAccView addSubview:btnDone];

  return inputAccView;
}

別の解決策：

View Controllerが表示されたら、キーボードイベントの通知を受け取り、キーボードの表示と非表示に応じてツールバーを表示できるようにします。

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear: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 {
[super viewWillDisappear:animated];

[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

キーボードの表示に応じて、画面の下からツールバーを上にアニメーション化できます。

- (void)keyboardWillShow:(NSNotification *)notification {
   //set your toolbar frame here for upper side
}

キーボードが閉じられたとき、私たちは正反対のことをします：

- (void)keyboardWillHide:(NSNotification *)notification {
   //set your toolbar frame here for down side
}
于 2012-08-17T09:17:39.480 に答える