没有互联网连接时的警报框 - Phonegap [英] Alert box when no internet connection - Phonegap

问题描述

我正在尝试在设备上没有互联网连接时弹出一个弹出窗口.

I'm trying to get a pop-up to, well, pop up when there is no internet connection on the device.

我得到 以下示例 工作，但现在我希望仅在结果为无网络连接"时显示警报.

I got the following example working, but now I want the alert only to show when the result is "No network connection".

我试过了:

if (states[Connection.NONE]){
       alert('Geen internet :(');
       };

但这只会弹出警报框，无论是否有连接.谁能帮我?:)

But that just makes the alert-box pop up, no matter if there is a connection or not. Who can help me? :)

推荐答案

老问题，但这是我的做法 - 您可以使用事件来检测设备是在线还是离线.这非常适合这种情况，因为一旦设备离线，弹出窗口就会出现:

Old-ish question, but here's how I'd do it - You can use events to detect if the device is online or offline. This is ideal for this situation as the pop-up will appear as soon as the device goes offline:

document.addEventListener("offline", function(){ alert("你离线") }, false);

也要做同样的事情，但是当设备重新连接互联网时?:

And to do the same, but when the device regains an internet connection?:

document.addEventListener("online", function(){ alert("你在线") }, false);

在此处查看事件文档:http://docs.phonegap.com/zh/1.8.1/cordova_events_events.md.html#offline

Check out the events docs here: http://docs.phonegap.com/en/1.8.1/cordova_events_events.md.html#offline

更新:

从 cordova 5 开始，这些事件已移至 cordova-plugin-network-information

as of cordova 5 these events have been moved to cordova-plugin-network-information

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