events.backbutton.md 2.3 KB


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title: backbutton

backbutton

在使用者按后退按钮时,将触发该事件。

document.addEventListener("backbutton", yourCallbackFunction, false);

详细资讯

要重写后退按钮的预设行为,注册为事件拦截器 backbutton 事件,通常通过调用 document.addEventListener 一旦您收到 [deviceready](events.deviceready.html) 事件。 不再需要调用任何其他方法重写的后退按钮的行为。

支援的平台

  • 亚马逊火 OS
  • Android 系统
  • 黑莓 10
  • Windows Phone 8

快速的示例

document.addEventListener("backbutton", onBackKeyDown, false);

function onBackKeyDown() {
    // Handle the back button
}

完整的示例

<!DOCTYPE html>
<html>
  <head>
    <title>Back Button Example</title>

    <script type="text/javascript" charset="utf-8" src="cordova.js"></script>
    <script type="text/javascript" charset="utf-8">

    // Wait for device API libraries to load
    //
    function onLoad() {
        document.addEventListener("deviceready", onDeviceReady, false);
    }

    // device APIs are available
    //
    function onDeviceReady() {
        // Register the event listener
        document.addEventListener("backbutton", onBackKeyDown, false);
    }

    // Handle the back button
    //
    function onBackKeyDown() {
    }

    </script>
  </head>
  <body onload="onLoad()">
  </body>
</html>