【问题标题】:Textview not able to move up when begin editing开始编辑时Textview无法向上移动
【发布时间】:2013-06-28 03:13:42
【问题描述】:

我在底部的UITextview 上移动时遇到问题。

UITextField 工作正常,但UITextView 不工作。

这是我的代码,当按下 TextView 时它会弹出工具栏。请帮忙

- (IBAction)HideKeyboard:(id)sender {
    [self.myTextField resignFirstResponder];
    [self.myTextView resignFirstResponder];
    [self.myScrollView setContentOffset:CGPointZero animated:YES];
}

【问题讨论】:

  • self.myTextView.delegate = 是?请检查这个..你可能错过了。
  • 不,我已经设置了 textview 委托。你知道为什么吗?
  • 是否应该改为[self.myTextView setContentOffset:CGPointZero animated:YES];
  • 请提供更多您尝试过的代码。以便能够理解您的问题并为您提供帮助。
  • 你想隐藏键盘还是显示键盘?还是要移动文本视图?

标签: iphone ios objective-c xcode ios6


【解决方案1】:

我假设您需要将 UITextView 移到键盘上方然后尝试以下方法

TPKeyboardAvoiding Framework 添加到您的项目中,这将负责将UITextField'sUITextView's 移动到键盘上方。

【讨论】:

  • @jason-lau 如果您发现任何的答案有用,请点赞,如果答案正确,请接受 这将有助于从未回答的问题列表列表中删除问题
【解决方案2】:

你的 TextView 必须在 ScrollView 之下。

试试这个。

在 ViewdidLoad 方法中设置键盘通知

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardWillShowNotification object:nil];

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

-(void)keyboardDidShow:(NSNotification *)notif
{

scrollView.contentSize=CGSizeMake(self.view.frame.size.width, scrollOriginalFrame.size.height+350);
    NSTimeInterval duration = 0.6;

if(txt_preRemindText.isFirstResponsder)
    {
        [UIView animateWithDuration:duration animations:
         ^{
             [scrollView setContentOffset:CGPointMake(0,260) animated:YES];

         }];

    }

}

【讨论】:

    【解决方案3】:

    使用此代码。

    //此代码添加在导入文件下方。

    static const CGFloat PORTRAIT_KEYBOARD_HEIGHT = 216;
    static const CGFloat LANDSCAPE_KEYBOARD_HEIGHT = 162;
    static const CGFloat KEYBOARD_ANIMATION_DURATION = 0.3;
    static const CGFloat MINIMUM_SCROLL_FRACTION = 0.2;
    static const CGFloat MAXIMUM_SCROLL_FRACTION = 0.8;
    

    //然后加上这个函数。

    -(void) textViewDidBeginEditing:(UITextView *)textView
    

    {

    CGRect textFieldRect = [self.view.window convertRect:textView.bounds fromView:textView];
    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];
      }
    

    //并为textview添加此方法

    - (void)textViewDidEndEditing:(UITextView *)textView
    {
    
    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];
    }
    
    
    - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    if ([text isEqualToString:@"\n"])
    {
        [txt_description resignFirstResponder];
        return NO;
    }
    return YES;
    

    }

    如果您在 textview 中编辑,您的视图会向上。

    【讨论】:

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