ios - UIKeyboardWillShowNotification 并在显示键盘时向上滑动

Question

这是我的代码:

-(void)setViewMovedUp:(BOOL)movedUp
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.2]; // if you want to slide up the view
    [UIView setAnimationBeginsFromCurrentState:YES];

    CGRect rect = scroll.frame;
    if (movedUp)
    {
        rect.size.height += kOFFSET_FOR_KEYBOARD;
        rect.origin.y -= kOFFSET_FOR_KEYBOARD;
    }
    else
    {
        rect.size.height -= kOFFSET_FOR_KEYBOARD;
        rect.origin.y += kOFFSET_FOR_KEYBOARD;


    }
    scroll.frame = rect; 
    [UIView commitAnimations];
}


- (void)keyboardWillHide:(NSNotification *)notif {
    [self setViewMovedUp:NO];
}


- (void)keyboardWillShow:(NSNotification *)notif{
    [self setViewMovedUp:YES];
}

- (void)viewWillAppear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) 
                                                 name:UIKeyboardWillShowNotification object:self.view.window];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) 
                                                 name:UIKeyboardWillHideNotification object:self.view.window];
}

- (void)viewWillDisappear:(BOOL)animated
{
    // unregister for keyboard notifications while not visible.
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}

问题是，我如何才能将其指定为仅适用于 TextView3，而不适用于 TextView2 或 TextView1。背景是，不需要 TextView1 和 TextView2，因为它们在我的 View 之上。只有TextView3是不可读的TextView，因为键盘被覆盖，必须修正view才能看清我写的内容。

Answer 1

为 textView3 分配一个特殊标签实现 TextView 委托(delegate)方法 - (void)textViewDidBeginEditing:(UITextView *)textView;在这里你将检查 textView 标签是否等于 textView 3 标签调用你的函数 -(void)setViewMovedUp:(BOOL)movedUp .

更多代码:

好的，您需要像这样将 TextViewDelegate 导入到您的 viewController 中:在 .h viewController 文件中 -> viewController : UIViewController<UITextVIewDelegate>

然后在 viewDidload 中为 ex 分配这样的标签:textView3.tag = 222;

然后采用我在“textViewDidBeginEdit”上方编写的委托(delegate)方法，并在内部创建一个 if 语句来检查 textView 标记是否等于 222 调用您的函数。

这是我现在能描述的最好的，因为我是用 iPhone 写的……祝你好运。