iPhone：在视图中滚动

发布于 2024-10-22 11:32:44 字数 131 浏览 5 评论 0原文

我想问一个关于iphone的基本问题。我在 iPhone 视图中有很多 TextField，当我点击在 TextField 中输入时，键盘会显示并隐藏其他 TextField。我想让父视图可滚动。您能给我看一下示例代码吗？

非常感谢

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酒儿 2024-10-29 11:32:44

您可以监听键盘向上和向下的通知。并将您的视图移动到键盘高度上方。

在 ViewWillAppear 方法中：

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:@selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];

在 ViewWillDisAppear 方法中：

  [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

然后有上面提到的方法来调整栏的位置：

-(void) keyboardWillShow:(NSNotification *) note
{
    CGRect r  = bar.frame, t;
    [[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
    r.origin.y -=  t.size.height;
    bar.frame = r;
}




 -(void) keyboardWillHide:(NSNotification *) note
    {
        CGRect r  = bar.frame, t;
        [[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
        r.origin.y +=  t.size.height;
        bar.frame = r;
    }

You can listen for the keyboard up and down notification. and move your view just above height of keyboard.

In the ViewWillAppear method:

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
[nc addObserver:self selector:@selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];

In the ViewWillDisAppear method:

  [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

And then have methods referred to above to adjust the position of the bar:

-(void) keyboardWillShow:(NSNotification *) note
{
    CGRect r  = bar.frame, t;
    [[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
    r.origin.y -=  t.size.height;
    bar.frame = r;
}




 -(void) keyboardWillHide:(NSNotification *) note
    {
        CGRect r  = bar.frame, t;
        [[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &t];
        r.origin.y +=  t.size.height;
        bar.frame = r;
    }

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陈独秀 2024-10-29 11:32:44

这将为您提供一个想法

如何制作当键盘存在时 UITextField 向上移动？

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娇女薄笑 2024-10-29 11:32:44

如果父视图是 UIScrollView 然后尝试类似文本字段委托

- (BOOL) textFieldShouldReturn:(UITextField *)theTextField
{   

    if (theTextField == textFieldName)  { 
        [scroll scrollRectToVisible:CGRectMake(0, 160, 280, 440) animated:YES];//choose the rect accordingly.
    }
    return YES; 

}

If the parentview is UIScrollView then try something like in textfield delegate

- (BOOL) textFieldShouldReturn:(UITextField *)theTextField
{   

    if (theTextField == textFieldName)  { 
        [scroll scrollRectToVisible:CGRectMake(0, 160, 280, 440) animated:YES];//choose the rect accordingly.
    }
    return YES; 

}

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