Question

当用户触摸webview中的文本字段时，我试图移动UIView，因为键盘将覆盖webview，用户将无法输入文本，我的代码工作得很好！在iOS 7上！但iOS 8视图向上移动，但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];


    }

}

我也尝试了UIKeyboardDidHideNotification和UIKeyboardDidShowNotification，但没有成功！

WebView从bundle加载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

添加一个监听器：

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

实施选择器：

-(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];
}];
}

Answer 2

由于我不知道您的约束是如何设置的，因此很难调整您的视图的特定问题。你真的不应该发出一个setFrame调用，尤其是高度和其他值的固定数字！

Sreejith已经指出，你可以通过这种方式获得键盘尺寸：

CGSize keyboardSize = [[[notif userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

如果您不想直接更改约束（不要忘记您可以IBOutlet它们并设置常量），您可以尝试使用以下内容更改边缘插入：

self.scrollView.contentInset = UIEdgeInsetsMake(self.topLayoutGuide.length, 0, self.view.height - keyboardSize.origin.y, 0);

动画时间也应该从键盘信息中删除：

NSTimeInterval animationDuration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

如果这些建议不起作用，链接到演示项目将有助于调试。

Answer 3

我通过设置webView的autoresizingMask

解决了同样的问题

_webView.autoresizingMask = UIViewAutoresizingFlexibleHeight;

在显示UIWebView的键盘时向上移动UIView

3 个答案: