ios - 显示 UIWebView 的键盘时向上移动 UIView

Question

我试图在用户触摸 web View 中的文本字段时移动 UIView，因为键盘将覆盖 web View 并且用户将无法输入文本，我的代码工作得很好!在 iOS 7 上!!!但是 iOS 8 View 向上移动但是当用户选择另一个文本字段(在 webview 中)时 UIView 向下移动到初始位置! .这是我的代码:

/* _contactForm = UIWebView
    _contactView = UIView */



- (void)viewDidLoad
{
    [super viewDidLoad];

   [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardDidShow:)
                                                 name:UIKeyboardWillShowNotification object:nil];

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

}


- (void)keyboardDidShow: (NSNotification *) notif {


      [[[_contactForm subviews] lastObject] setScrollEnabled:YES];

    if ([[UIDevice currentDevice]userInterfaceIdiom]==UIUserInterfaceIdiomPad) {


    [UIView animateWithDuration:.20
                          delay:0
                        options:UIViewAnimationOptionCurveLinear animations:^
                        {

                         [_contentView setFrame:CGRectMake(0, 37 , _contentView.frame.size.width, _contentView.frame.size.height)];


                        } completion:nil];

    }

}




- (void)keyboardDidHide: (NSNotification *) notif{

    [[[_contactForm subviews] lastObject] setScrollEnabled:NO];

    [UIView animateWithDuration:.20
                          delay:0
                        options:UIViewAnimationOptionCurveLinear animations:^
     {

         [_contentView setFrame:CGRectMake(0, 176 , _contentView.frame.size.width, _contentView.frame.size.height)];

     }completion:nil];


    }

}

我也试过 UIKeyboardDidHideNotification 和 UIKeyboardDidShowNotification ，但没有成功!

WebView 从 bundle 加载一个 HTML 文件，这是 textfield 的代码:

<form action="http://someurl.net/mail/mail.cshtml" method="post"  onsubmit="return validate();">

    <input class="textInput" type="text" name="name" placeholder="NAME"/>

    <div class="clearfix"></div>
    <input class="textInput" type="email" name="email" placeholder="EMAIL"/>

    <div class="clearfix"></div>
    <input class="textInput" type="text" name="phone" placeholder="PHONE"/>

    <div class="clearfix"></div>
    <textarea name="msg" cols="19" rows="3" placeholder="MESSAGE"></textarea>
    <div class="clearfix"></div>
    <input type="submit" class="submit" value="SEND"/>

</form>

Answer 1

在 iOS 8 中，最好使用 keyboardFrameDidChange 而不是 UIKeyboardWillShowNotification

添加监听器:

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardFrameDidChange:)
                                                 name:UIKeyboardDidChangeFrameNotification object:nil];

实现选择器:

-(void)keyboardFrameDidChange:(NSNotification*)notification{

NSDictionary* info = [notification userInfo];

CGRect kKeyBoardFrame = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

[UIView animateWithDuration:0.25f delay:0 options:[[[notification userInfo] objectForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue] animations:^{

   // Do your animation
} completion:^(BOOL finished) {

    [yourView layoutIfNeeded];
}];
}