编辑时TextField附加到键盘 - 如何使ScrollView与编辑前相同？

6 回答

• 1

  You need adjust scrollview contentOffset textFieldDidBeginEditing and textFieldDidEndEditing.
  or 
  One controller is available for scrollview auto scroll.
  

  https://github.com/simonbs/BSKeyboardControls

  回复于 2024-05-06T21:16:36+08:00
• 0

  我认为Apple here指定的官方方式是保持此功能正常运行的最简单和最佳方式 .

  回复于 2024-05-06T21:16:36+08:00
• 1

  您也可以在不使用键盘通知的情况下执行类似的操作 . 您可能知道我们有 TextField 委托方法，我们可以使用它们来设置scrollView contentOffset并获取相同的行为

  - (void)textFieldDidBeginEditing:(UITextField *)textField{
      scrollView.contentOffset = CGPointMake(0, textField.center.y-80); // you can change 80 to whatever which fits your needs
  }
  

  上面的方法设置 contentOffset 滚动视图的值和 textFiled 向上移动，而 textField resignFirstResponder 调用下面的委托方法，您可以在其中设置 contentOffset 值

  - (void)textFieldDidEndEditing:(UITextField *)textField{
         scrollView.contentOffset = CGPointMake(0,-80);
  }
  

  注意：您需要使视图中的每个文本字段都将其委托作为 UIViewController 实例 . 您还需要 UIViewController 采用 UITextFieldDelegate

  回复于 2024-05-06T21:16:36+08:00
• 0

  看看你的代码，在尝试定位滚动视图时，你不需要改变内容插入等 . 您只需要修改内容偏移属性 .

  这是修改后的代码：

  @interface ViewController () {
  UITextField *activeField;
  CGPoint scrollViewOldPosition;
  }
  

  修改keyboardWasShow如下：

  // Called when the UIKeyboardDidShowNotification is sent.
   - (void)keyboardWasShown:(NSNotification*)aNotification
  {
      NSDictionary* info = [aNotification userInfo];
  CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
  
  
  CGFloat someSpaceBetweenKeyBoardAndField = 20.0;
  scrollViewOldPosition = self.scrollView.contentOffset;
  
  self.scrollView.contentOffset = CGPointMake(0, kbSize.height - (self.view.frame.size.height - activeField.frame.origin.y - activeField.frame.size.height) + someSpaceBetweenKeyBoardAndField);
  }
  

  键盘将隐藏方法：

  // Called when the UIKeyboardWillHideNotification is sent
  - (void)keyboardWillBeHidden:(NSNotification*)aNotification
  {
      self.scrollView.contentOffset = scrollViewOldPosition;
  }
  

  回复于 2024-05-06T21:16:36+08:00
• 0

  不是最好的代码，但它有一些你可以使用的功能，任何带_的都是全局变量

  //Handle notification when keyboard appear
  - (void)keyboardOnScreen:(NSNotification *)notification
  {
      if (_isKeyboardShow) {
          return; //If keyboard is showing then return
      }
      _keyboardHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
      [self animateTextFieldUp: YES];
      _isKeyboardShow = YES; 
  }
  
  //Handle notification when keyboard hide
  - (void)keyboardOffScreen:(NSNotification *)notification
  {
      if(!_isKeyboardShow) return;
      [self animateTextFieldUp: NO];
      _isKeyboardShow = NO;//Missed this line
  }
  
  //Push view up with animation when keyboard show
  - (void) animateTextFieldUp: (BOOL) up
  {
      UITextField *textfield = [UIResponder currentFirstResponder];
      CGPoint windowPoint = [textfield convertPoint:textfield.bounds.origin toView:self.view];
      int movementDistance;
      CGPoint point = [_mainScrollView contentOffset];
  
      //Push up only when blocked by keyboard
      if (windowPoint.y + textfield.frame.size.height >= self.view.frame.size.height - _keyboardHeight) {
          movementDistance = windowPoint.y - (self.view.frame.size.height - _keyboardHeight) +  textfield.frame.size.height + 10;
          _oldMovementDistance = movementDistance;
          int movement = (up ? -movementDistance : movementDistance);
      [_mainScrollView setContentOffset:CGPointMake(0, point.y - movement) animated:YES];
      }
      else { //Push view down the same amount
          int movement = (up ? -movementDistance : _oldMovementDistance);
          [_mainScrollView setContentOffset:CGPointMake(0, point.y - movement) animated:YES];
          _oldMovementDistance = 0;
      }
  }
  

  回复于 2024-05-06T21:16:36+08:00
• 0

  在编辑过程中将UITextField和UITextView移出键盘：

  对于非UITableViewControllers，将 TPKeyboardAvoidingScrollView.m 和 TPKeyboardAvoidingScrollView.h 源文件放入项目中，将UIScrollView弹出到视图控制器's xib or storyboard, set the scroll view's类中以TPKeyboardAvoidingScrollView，并将所有控件放在该滚动视图中 . 您也可以在不使用xib的情况下以编程方式创建它 - 只需使用TPKeyboardAvoidingScrollView作为顶级视图 .

  要与UITableViewController类一起使用，请将TPKeyboardAvoidingTableView.m和TPKeyboardAvoidingTableView.h拖放到项目中，并使您的UITableView成为xib中的TPKeyboardAvoidingTableView . 如果您没有在控制器中使用xib，我知道没有简单的方法可以使其UITableView成为自定义类：阻力最小的路径是为它创建一个xib .

  你可以从here获得参考 .

  希望这可以帮助 .

  回复于 2024-05-06T21:16:36+08:00