iphone - 开始编辑时Textview无法向上移动

Question

我UITextview在底部向上移动时遇到问题。

UITextField工作正常，但工作不UITextView正常。

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];
}

Answer 1

我假设您需要将 UITextView 移动到键盘上方，然后尝试以下方法

将TPKeyboardAvoiding 框架添加到您的项目中，该框架将负责移动键盘上方的UITextField's和上方。UITextView's

Answer 2

您的 TextView 必须在 ScrollView 下。

尝试这个。

在 ViewdidLoad 方法中为键盘设置通知

[[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];

         }];

    }

}

Answer 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;

//然后添加这个函数。

-(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。