Question

我有一个运行WinJS流程线程的Windows Phone Phonegap / Cordova应用程序。但是，这确实需要在应用程序初始化和后台运行 - 在一个时间间隔内进行轮询。

我基本上想要做的是拥有一个PhoneGap应用程序，该应用程序执行AJAX调用作为后台进程，以便在从服务器发送文件时保持文件最新。

$scope.test = function(){
    $timeout(function () {
        document.getElementById('test').select();
    }, 0);
};

我一直在用这个撕开我的头发，我已经尝试了很多代码，我的脑子被炒了。我敢肯定它一定是可能的，但我无法弄清楚如何将AJAX调用作为后台服务...

先发制人的“为帮助男女们欢呼”！

Answer 1

您需要在App启动时以及每次计时器用完时更新一些信息。是不是？

我会这样做：

function yourMainFunction(){
    try{
        if(localStorage){

            //A flag that indicates if it is App Instalation (First Use) or Not
            if(!localStorage.appRunFirstTime){
                callLoadingStructure();

                //Assuming that you data file is a TXT file and we have a JSON Structure inside it
                setTimeout(function(){
                    $.ajax({
                        type: 'GET',
                        dataType: 'text',
                        url: 'yourSite/yourData.txt',
                        success: function (data) {
                            var content = JSON.parse(data);

                            //The JSON parsed DATA
                            doWhateverYouNeedWithTheData(content);//This method should use the data from your server
                            localStorage.setItem("appRunFirstTime", "OK!!!");
                            closeLoadingStructure();
                        }
                        error: function(errowThrown){
                            console.log(errowThrown);
                        }
                    });

                //Minimun timeout to show Loading Structure even if the request works without any lag
                }, 1000);
            }
            //App is already instaled
            else{
                setInterval(function(){
                    $.ajax({
                        type: 'GET',
                        dataType: 'text',
                        url: 'yourSite/yourData.txt',
                        success: function (data) {
                            var content = JSON.parse(data);

                            //The JSON parsed DATA
                            doWhateverYouNeedWithTheData(content);
                            //updateDOM?(); if you need to update the DOM when new information comes up
                        }
                        error: function(errowThrown){
                            console.log(errowThrown);
                        }
                    });

                //Minimun timeout to show Loading Structure even if the request works without any lag
                }, 30000);
            }
        }
    }
    catch(error){
        console.log(error);
    }
}

function callLoadingStructure(){
    //Its a example of a loading structure while the first content loads
    document.getElementById("yourMainContentDiv").style.display = "none";
    document.getElementById("yourLoadingDiv").style.display = "block";
}

function closeLoadingStructure(){
    //Cloasing loading structure and showing maindiv
    document.getElementById("yourMainContentDiv").style.display = "block";
    document.getElementById("yourLoadingDiv").style.display = "none";
}

希望它有所帮助。最好的问候！

将后台进程添加到我的Windows Phone应用程序

1 个答案: