我想使事情发生时，后退按钮是pressed所以我把这个code。在我的应用程序的.js文件：

I want to make something happen when back button is pressed so I put this code in my app's .js file:

function wlCommonInit(){            
    // Common initialization code goes here
    WL.App.overrideBackButton(backFunc);
}

function backFunc(){
    alert('You will back to previous page');
}

构建和部署应用程序，并在设备上运行后，警报显示，当我preSS后退按钮。

After building and deploying the application and running it in a device, the alert is shown when I press the Back button.

如果我现在退出由pressing应用程序上的主页按钮，杀死应用程序的过程，然后再次打开应用程序和preSS后退按钮 - 这是行不通的。

If I now exit the app by pressing on the Home button and kill the app's process, and then open the app again and press the Back button - it doesn't work.

推荐答案

将code INSIDE wlCommonInit（）。我建议这样做以这种方式：

Place your code INSIDE wlCommonInit(). I suggest to do so in this manner:

function wlCommonInit() {
    WL.App.overrideBackButton(backFunc);      
}

function backFunc() {
    alert('You will back to previous page');
}

修改：问题更新上述code片段，并根据意见的新信息。情景工作正常。见注释。

Edit: Question updated with the above code snippet and new information based on the comments. Scenario works fine. See comments.