UIScrollView 中的 UITextView 中的键盘方向

Posted 2023-03-16

【中文标题】UIScrollView 中的 UITextView 中的键盘方向

【英文标题】：Keyboard orientation in UITextView in UIScrollView

【发布时间】：2012-09-14 11:22:25

【问题描述】：

在我的应用程序中，我使用具有UITextField 和UITextView 的UIScrollView，我在UITextField 中对键盘方向进行了编码。它工作正常，但不适用于UITextView。在UITextView 中编辑时，键盘将完全隐藏UITextView。这是我的代码

- (void)textFieldDidBeginEditing:(UITextField *)textField 
  [textField setClearButtonMode:UITextFieldViewModeWhileEditing];
  CGRect textFieldRect = [self.view.window convertRect:textField.bounds fromView:textField];
  CGRect viewRect = [self.view.window convertRect:self.view.bounds fromView:self.view];
  CGFloat midline = textFieldRect.origin.y + 0.5 * textFieldRect.size.height;
  CGFloat numerator = midline - viewRect.origin.y - MINIMUM_SCROLL_FRACTION * viewRect.size.height;
  CGFloat denominator = (MAXIMUM_SCROLL_FRACTION - MINIMUM_SCROLL_FRACTION) * viewRect.size.height;
  CGFloat heightFraction = numerator / denominator;
  if (heightFraction < 0.0) 
    heightFraction = 0.0;
   else if (heightFraction > 1.0) 
    heightFraction = 1.0;
  
  UIInterfaceOrientation orientation =
    [[UIApplication sharedApplication] statusBarOrientation];
  if (orientation == UIInterfaceOrientationPortrait ||
    orientation == UIInterfaceOrientationPortraitUpsideDown) 
    animatedDistance = floor(PORTRAIT_KEYBOARD_HEIGHT * heightFraction);
   else 
    animatedDistance = floor(LANDSCAPE_KEYBOARD_HEIGHT * heightFraction);
  
  CGRect viewFrame = self.view.frame;
  viewFrame.origin.y -= animatedDistance;
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationBeginsFromCurrentState:YES];
  [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
  [self.view setFrame:viewFrame];
  [UIView commitAnimations];

- (void)textFieldDidEndEditing:(UITextField *)textField 
  CGRect viewFrame = self.view.frame;
  viewFrame.origin.y += animatedDistance;
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationBeginsFromCurrentState:YES];
  [UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
  [self.view setFrame:viewFrame];
  [UIView commitAnimations];    

谁能帮我解决这个问题？

【参考方案1】：

为 UITextview 使用 textview 的委托方法 像下面的

-(void)textViewDidBeginEditing:(UITextView *)textView;

还有

-(void)textViewDidEndEditing:(UITextView *)textView;

类似 textField 委托方法

例如...

-(void)textViewDidBeginEditing:(UITextView *)textView

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    self.view.frame=CGRectMake(0, -100, 320, 460);//just for an example
    [UIView commitAnimations];



-(void)textViewDidEndEditing:(UITextView *)textView
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    self.view.frame=CGRectMake(0,0, 320, 460);
    [UIView commitAnimations];

希望对你有所帮助..

:)

【讨论】：

也在.h文件中定义UITextFieldDelegate

在这些委托方法-(void)textViewDidBeginEditing:(UITextView *)textView; 和-(void)textViewDidEndEditing:(UITextView *)textView; 我应该怎么做

您在文本字段中使用的代码所有代码都在这些方法中使用，但只使用关键字“textview”而不是“textfield”

【参考方案2】：

您可以尝试强烈推荐的“TPKeyboardAvoidingScrollView”，可从：TPKeyboardAvoiding

【参考方案3】：

首先添加你的“.h”文件

确实加载了

textView.delegate=self;

那么 给定 textView 的代码

textView.userinteractionEnabled=YES;