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当键盘用于滚动视图时,文本字段消失

uitextfield uiscrollview ios

sudheer · 技术社区 · 12 年前

我在UisrollView中出现键盘问题。

我添加了一个UIScrollview作为

scrlView=[[UIScrollView alloc] initWithFrame:CGRectMake(10, 140, 1000, 600)];
scrlView.scrollEnabled=YES;
scrlView.showsVerticalScrollIndicator=YES;
scrlView.bounces=NO;

在这个滚动视图中,我添加了10行UITextFields,每行有5个textFields,每个textfield的高度是50px。当试图编辑文本字段时,它与键盘重叠。为此,我尝试了以下代码

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


   - (void)keyboardWasShown:(NSNotification*)aNotification
  {
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
CGRect bkgndRect = selectetTxtfld.superview.frame;
bkgndRect.size.height += kbSize.height;
[selectetTxtfld.superview setFrame:bkgndRect];
[scrlView setContentOffset:CGPointMake(0.0, selectetTxtfld.frame.origin.y) animated:YES];
}

}

//发送UIKeyboardWillHideNotification时调用

 - (void)keyboardWillBeHidden:(NSNotification*)aNotification
  {
  UIEdgeInsets contentInsets = UIEdgeInsetsZero;

  [UIView animateWithDuration:0.4 animations:^{
     scrlView.contentInset = contentInsets;
  }];
  scrlView.scrollIndicatorInsets = contentInsets;
 }

但是文本字段没有出现在键盘上。它出现在滚动视图的Y点位置

帮我解决这个问题。我在StackOverFlow中看到了很多答案。但没有解决我的问题

2 回复 | 直到 12 年前

dRAGONAIR 12 年前

- (void)keyboardWillBeHidden:(NSNotification*)aNotification {

NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
CGFloat offSetAfterKeyboardIsDisplayed = scrlview.contentOffset.y + kbSize.height;

[UIView animateWithDuration:0.3 animations:^{
//adding content inset at the bottom of the scrollview
   scrlView.contentInset = UIEdgeInsetMake(0,0,kbSize.height,0);
   [scrlview setContentOffset:offSetAfterKeyboardIsDisplayed]
}];
}


- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{

NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
CGFloat offSetAfterKeyboardResigns = scrlview.contentOffset.y - kbSize.height;

[UIView animateWithDuration:0.3 animations:^{
   scrlView.contentInset = UIEdgeInsetsZero;
   [scrlview setContentOffset:offSetAfterKeyboardResigns]
}];
}

dRAGONAIR 12 年前

在键盘中显示: 1.在滚动视图的底部添加内容插图,其值等于键盘的高度。 2.setContentOffset=当前偏移量+键盘的高度。注:1&3应该在持续时间等于0.30的动画块中完成

在键盘中WillBeHidden: 1.设置contentInset=UIEdgeInsetsZero 2.setContentOffset=当前偏移量-键盘的高度。注:1&3应该在持续时间等于0.30的动画块中完成

这应该可以解决您的问题:)