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问UIScrollView中UITextView中的键盘方向
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Stack Overflow用户

提问于 2012-09-14 11:22:25

回答 3查看 319关注 0票数 0

在我的应用程序中，我使用了一个具有UITextField和UITextView的UIScrollView，我用UITextField编写了键盘方向的代码。它工作正常，但对UITextView不起作用。在UITextView中编辑时，键盘完全隐藏了UITextView。以下是我的代码

- (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];    
}

有人能帮我清理一下吗？

iphone

ios

uiscrollview

uitextfield

uitextview

回答 3

Stack Overflow用户

发布于 2012-09-14 11:32:12

为UITextview使用textview的委托方法，如下所示

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

而且还

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

与textField委托方法相同

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];
}