Android - 当软键盘打开时 html 输入失去焦点 (ASP.net) [英] Android - html input loses focus when soft keyboard opens (ASP.net)

问题描述

我在 ASP.net 中编写了一个网页登录表单.

使用 Nexus 4、Android 4.2.1、原生 Chrome 浏览器 - 当我点击 <input> 字段时，软键盘出现，然后该字段立即失去焦点.我必须在键盘已经打开的情况下再次单击 字段才能实际输入文本.

这在桌面版 Chrome 中不会发生.

我在 ASP 用户控件中有以下登录表单:

<asp:Login ID="login_form" runat="server" OnLoginError="OnFail" OnLoggedIn="OnLoggedIn" RenderOuterTable="false" RememberMeSet="True"><布局模板><asp:Panel runat="server" DefaultButton="LoginButton" CssClass="members-login"><字段集><label for="UserName">用户名</label><asp:TextBox ID="username" placeholder="e.g. joebloggs12" runat="server"></asp:TextBox><label for="密码">密码</label><asp:TextBox ID="password" runat="server" placeholder="e.g. 1234" TextMode="Password"></asp:TextBox><label id="RememberMe">记住我</label><asp:CheckBox ID="RememberMe" runat="server"/><asp:Button CssClass="button" ID="LoginButton" runat="server" CommandName="Login" Text="SUBMIT"/></fieldset></asp:面板></LayoutTemplate></asp:登录>

在浏览器中显示如下:

<div class="members-login" onkeypress="javascript:return WebForm_FireDefaultButton(event, &#39;ContentPlaceHolderDefault_contentBody_masterContent_login_form_LoginButton&#39;)"><字段集><label for="UserName">用户名</label><input name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$username" type="text" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_username" placeholder="例如joebloggs12"/><label for="密码">密码</label><input name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$password" type="password" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_password" placeholder="e.g. 1234"/><label id="RememberMe">记住我</label><input id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_RememberMe" type="checkbox" name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$RememberMe"checked="checked"/><input type="submit" name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$LoginButton" value="SUBMIT" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_LoginButton" class="button"/></fieldset>

我怀疑 ViewState 正在以某种方式窃取焦点.但我试过 event.stopPropogation() 没有帮助.

<小时>

临时修复

现在我已经解决了一个hacky修复，在点击700毫秒后强制焦点回到<input>元素上:

jQuery('input').bind('click',function(evt) {var focusClosure = (function(inputElem) {return function() {console.log(inputElem.focus());}}($(evt.target)));window.setTimeout(focusClosure, 700);});

解决方案

我发现这与 ASP.net 或 ViewState 无关.

当 Android 键盘出现时，浏览器窗口被调整大小 - 触发 resize 事件.

我正在运行类似于以下内容:

//在调整大小时移动导航$(window).bind('resize', function() {如果(最大宽度 <= 710 像素){$('.nav').after($('.main-content'));}});

这移动了 DOM 中的导航.我猜这会重绘 DOM，因此会导致 DOM 中的任何内容失去焦点.我在调整大小时阻止了这种情况发生 - 使其仅在初始页面加载时发生.

I've written a web-page login form in ASP.net.

Using a Nexus 4, stock Android 4.2.1, native Chrome browser - when I click on the <input> fields, the soft keyboard appears and then the field immediately loses focus. I have to click the <input> field again with the keyboard already open to actually enter text.

This doesn't happen in Chrome on a desktop.

I have the following login form in an ASP user control:

<asp:Login ID="login_form" runat="server" OnLoginError="OnFail" OnLoggedIn="OnLoggedIn" RenderOuterTable="false" RememberMeSet="True">
    <LayoutTemplate>

        <asp:Panel runat="server" DefaultButton="LoginButton" CssClass="members-login">
            <fieldset>
                <label for="UserName">Username</label>
                <asp:TextBox ID="username" placeholder="e.g. joebloggs12" runat="server"></asp:TextBox>

                <label for="Password">Password</label>
                <asp:TextBox ID="password" runat="server" placeholder="e.g. 1234" TextMode="Password"></asp:TextBox>

                <label id="RememberMe">Remember me</label>
                <asp:CheckBox ID="RememberMe" runat="server" />

                <asp:Button CssClass="button" ID="LoginButton" runat="server" CommandName="Login" Text="SUBMIT" />
            </fieldset>
        </asp:Panel>         
    </LayoutTemplate>
</asp:Login>

which appears to the browser like this:

<div class="members-login" onkeypress="javascript:return WebForm_FireDefaultButton(event, &#39;ContentPlaceHolderDefault_contentBody_masterContent_login_form_LoginButton&#39;)">

    <fieldset>
        <label for="UserName">Username</label>
        <input name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$username" type="text" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_username" placeholder="e.g. joebloggs12" />

        <label for="Password">Password</label>
        <input name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$password" type="password" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_password" placeholder="e.g. 1234" />

        <label id="RememberMe">Remember me</label>
        <input id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_RememberMe" type="checkbox" name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$RememberMe" checked="checked" />

        <input type="submit" name="ctl00$ctl00$ctl00$ContentPlaceHolderDefault$contentBody$masterContent$login_form$LoginButton" value="SUBMIT" id="ContentPlaceHolderDefault_contentBody_masterContent_login_form_LoginButton" class="button" />
    </fieldset>
</div>  

My suspicion is that the ViewState is stealing focus somehow. But I tried event.stopPropogation() which didn't help.

---

Temporary fix

For now I've settled for a hacky fix, forcing focus back onto the <input> element 700 milliseconds after a click:

jQuery('input').bind('click',function(evt) {
    var focusClosure = (function(inputElem) {return function() {console.log(inputElem.focus());}}($(evt.target)));
    window.setTimeout(focusClosure, 700);
});

解决方案

I discovered this is nothing to do with ASP.net or ViewState.

When the Android keyboard appears, the browser window is resized - triggering the resize event.

I was running something similar to the following:

// Move the navigation on resize
$(window).bind('resize', function() {
    if(maxWidth <= 710px) {
        $('.nav').after($('.main-content'));
    }
});

This moved the navigation in the DOM. I guess this redraws the DOM and so causes anything in the DOM to lose focus. I stopped this from happening on resize - making it only happen on initial page load instead.

这篇关于Android - 当软键盘打开时 html 输入失去焦点 (ASP.net)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！