iPhone键盘隐藏了Uiseachbar

Question

我在视图底部有一个搜索栏。问题是每当我在键盘中输入内容时，搜索栏仍然保留在底部，我无法查看我正在输入的内容。我想在键盘弹出时动态地将其向上移动，然后在键盘消失后收回其原始位置。不幸的是，搜索栏必须位于我的应用程序的底部，并且有点卡在这个位置。

有什么方法可以仅在键盘出现时向上移动搜索栏吗？任何代码片段都会非常有帮助。

Answer 1

最好的选择可能是使用–SearchBarshouldBegineding：在UisearchBardelegate协议中。

看起来像这样：

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {
    CGRect newFrame = //some rect
    mySearchBar.frame = newFrame;
    return YES;//this is important!
}
- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar {
    CGRect originalFrame = //the original frame
    mySearchBar.frame = originalFrame;
    return YES;
}

编辑：其他答案之一建议使用Uikeyboard通知，但这可能会令人困惑。但是，它确实给出了每次出现键盘时工作的优势，而不仅仅是Uisearchbar是第一响应者。

编辑2：
Mayur Joshi建议使用动画，可以这样做：

[UIView animateWithDuration:duration
            animations:^{ 
                //what you want to animate (in this case, the search bar's frame)
            } 
            completion:^(BOOL finished){
                //what to do when the animation finishes
            }];

编辑3：
如果您不想掩盖搜索栏后面的视图，则每当搜索栏移动时，都必须缩小其高度。它可以与代码相同的位置来动画搜索栏。

Answer 2

你好，试试这个
sBar 是 UISearchBar 对象。

    - (void)keyboardWillShow:(NSNotification *)aNotification 
    {
        // the keyboard is showing so resize the table's height
        CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
        NSTimeInterval animationDuration =
        [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
        CGRect frame = sBar.frame;
        NSLog(@"%f",frame.size.height);
        NSLog(@"%f",frame.origin.y);
        frame.origin.y=frame.origin.y- keyboardRect.size.height;
        [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
        [UIView setAnimationDuration:animationDuration];
        sBar.frame = frame;
        NSLog(@"%f",frame.size.height);
        NSLog(@"%f",frame.origin.y);
        [UIView commitAnimations];
    }

    - (void)keyboardWillHide:(NSNotification *)aNotification
    {
        // the keyboard is hiding reset the table's height
        CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
        NSTimeInterval animationDuration =
        [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
        CGRect frame = sBar.frame;
        NSLog(@"%f",frame.size.height);
        NSLog(@"%f",frame.origin.y);
        frame.origin.y=frame.origin.y+ keyboardRect.size.height;
        [UIView beginAnimations:@"ResizeForKeyboard" context:nil];
        [UIView setAnimationDuration:animationDuration];
        sBar.frame = frame;
        NSLog(@"%f",frame.size.height);
        NSLog(@"%f",frame.origin.y);

        [UIView commitAnimations];
    }

Answer 3

您将必须使用 UIScrollView 并将此搜索栏保留在该滚动视图中。现在，当您开始编辑搜索栏时，即为

 - (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar

UIScrollView设置scrollRectToVisible方法，以便使您的SearchBar像这样可见......

[yourScrollView scrollRectToVisible:CGRectMake(0, 300, yourScrollView.frame.size.width, yourScrollView.frame.size.height) animated:YES];    

当您在搜索栏中写入文本时，即

 - (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar1

设置滚动视图scrollRectToVisible 恢复到其原始大小。

[yourScrollView scrollRectToVisible:CGRectMake(0, 0, yourScrollView.frame.size.width, yourScrollView.frame.size.height) animated:YES];