ios - 向上推软键盘时如何更改UIScrollView内容的高度

我有一个带有textview和一个按钮的视图，就像在任何典型的消息传递应用程序中一样。出现键盘时，文本视图和按钮也被向上推，但内容被向上推离屏幕，在那里我看不到它的顶端，但是当我向下滚动时，我看到它向下蠕动并且向上弹起当我放手。我已经用快速草图说明了我遇到的问题，第三个屏幕是所需的行为。

我在.xib文件中有此视图。我有一个视图-> ScrollView-> contentView(它具有一个表以及textview和按钮)



我注册了键盘通知，这是show / hide方法的代码

- (void)registerForKeyboardNotifications {
   [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardWasShown:)
                                             name:UIKeyboardWillShowNotification
                                           object:nil];

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

}

- (void)keyboardWasShown:(NSNotification *) aNotification {
   NSDictionary *info = [aNotification userInfo];

   CGSize keyboardSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;

   // the hardcoded 49 is the height of the uitabbar
   UIEdgeInsets contentInsets = UIEdgeInsetsMake(-keyboardSize.height+49, 0.0, keyboardSize.height-49, 0.0);
   self.scrollView.contentInset = contentInsets;
   self.scrollView.scrollIndicatorInsets = contentInsets;

   [self.view addGestureRecognizer:self.tapRecognizer];

 }


- (void)keyboardWillBeHidden:(NSNotification *) aNotification {
   UIEdgeInsets contentInsets = UIEdgeInsetsZero;
   self.scrollView.contentInset = contentInsets;
   self.scrollView.scrollIndicatorInsets = contentInsets;

   [self.view removeGestureRecognizer:self.tapRecognizer];
}

最佳答案

我已经在keyboardWasShown方法中看到了这一行

UIEdgeInsets contentInsets = UIEdgeInsetsMake(-keyboardSize.height+49, 0.0, keyboardSize.height-49, 0.0);

边缘插图的最高位置是-ve，因为49-keyboardSize(即appx 256)。替换为:

UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height-49), 0.0);

体验适合您的最佳计算套件。希望这项工作:)

关于ios - 向上推软键盘时如何更改UIScrollView内容的高度，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/36805503/