Question

如果我关闭Ionic / Cordova应用程序（适用于iOS和Android），是否可以运行后台服务？

为此我选择了插入https://github.com/katzer/cordova-plugin-background-mode

到目前为止，我有那段代码：

$ionicPlatform.ready(function () {
            cordova.plugins.backgroundMode.isEnabled();

            cordova.plugins.backgroundMode.configure({
                silent: true
            }) 
              ............
            ///do some task
)}

如果应用程序转到前台，它可以正常运行但是一旦我关闭应用程序，我正在运行的任务也会停止。那么即使应用程序关闭，有没有任何解决方法/方法使我的任务运行？

修改

我还为iOS和Andorid添加了权限，但我得到了相同的结果。

编辑2：

我在后台尝试做的是编写自己的重要位置更改服务实现，因为没有适用于iOS和Android的Cordova或PhoneGap的免费插件。

Answer 1

Ionic Framework

我最近在我的项目中实现了这样的功能。我确实使用了Ionic，我确实使用了Katzer的Cordova插件背景模式。（现在我正在通过iOS 9.2模拟器运行后台进程）。

这是一个让它运行的代码片段：

// Run when the device is ready
document.addEventListener('deviceready', function () {

    // Android customization
    // To indicate that the app is executing tasks in background and being paused would disrupt the user.
    // The plug-in has to create a notification while in background - like a download progress bar.
    cordova.plugins.backgroundMode.setDefaults({ 
        title:  'TheTitleOfYourProcess',
        text:   'Executing background tasks.'
    });

    // Enable background mode
    cordova.plugins.backgroundMode.enable();

    // Called when background mode has been activated
    cordova.plugins.backgroundMode.onactivate = function () {

        // Set an interval of 3 seconds (3000 milliseconds)
        setInterval(function () {

            // The code that you want to run repeatedly

        }, 3000);
    }
}, false);

Ionic Framework 2

这是一个Ionic 2示例ES6准备就绪：

// Import the Ionic Native plugin 
import { BackgroundMode } from 'ionic-native';

// Run when the device is ready
document.addEventListener('deviceready', () => {

    // Android customization
    // To indicate that the app is executing tasks in background and being paused would disrupt the user.
    // The plug-in has to create a notification while in background - like a download progress bar.
    BackgroundMode.setDefaults({ 
        title:  'TheTitleOfYourProcess',
        text:   'Executing background tasks.'
    });

    // Enable background mode
    BackgroundMode.enable();

    // Called when background mode has been activated
    // note: onactive now returns an returns an observable that emits when background mode is activated
    BackgroundMode.onactivate.subscribe(() => {
          // The code that you want to run repeatedly
    });
}, false);

Answer 2

我认为您尝试实施的背景地理位置跟踪已经作为cordova插件存在，它被称为cordova-plugin-mauron85-background-geolocation。

此插件是前台和后台地理定位服务。它比html5地理定位或cordova-geolocation插件更具电池和数据效率。

有很多配置选项，请参阅上面链接的github页面。

Answer 3

IONIC-3的解决方法

导入插件

 For i = LastRow To 2 Step -1
    If Cells(i, "A").Value <> Application.Evaluate("MAX(IF(" & Range(Cells(1, "B"), Cells(LastRow, "B")).Address _
        & "=" & Cells(i, "B").Address & "," & Range(Cells(1, "A"), Cells(LastRow, "A")).Address & "))") Then
        Rows(i).Delete
    End If
Next i

添加构造函数

(BOOL)isUpdateAvailable:(NSString*)latestVersion 
{ 
    NSString *currentAppVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];

    NSArray *myCurrentVersion = [currentAppVersion componentsSeparatedByString:@"."];
    NSArray *myLatestVersion = [latestVersion componentsSeparatedByString:@"."];
    NSInteger legthOfLatestVersion = myLatestVersion.count;
    NSInteger legthOfCurrentVersion = myCurrentVersion.count;
    if (legthOfLatestVersion == legthOfCurrentVersion)
    {
        for (int i=0; i<myLatestVersion.count; i++)
        {
            if ([myCurrentVersion[i] integerValue] < [myLatestVersion[i] integerValue])
            {
                return true;
            }
            else if ([myCurrentVersion[i] integerValue] == [myLatestVersion[i] integerValue])
            {
                continue;
            }
            else
            {
               return false;
            }
        }
        return false;
    }
    else
    {
        NSInteger count = legthOfCurrentVersion > legthOfLatestVersion ? legthOfLatestVersion : legthOfCurrentVersion;
        for (int i=0; i<count; i++)
        {
            if ([myCurrentVersion[i] integerValue] < [myLatestVersion[i] integerValue])
            {
                return true;
            }
            else if([myCurrentVersion[i] integerValue] > [myLatestVersion[i] integerValue])
            {
                return false;
            }
            else if ([myCurrentVersion[i] integerValue] == [myLatestVersion[i] integerValue])
            {
                continue;
            }
        }

        if (legthOfCurrentVersion < legthOfLatestVersion)
        {
            for (NSInteger i=legthOfCurrentVersion; i<legthOfLatestVersion; i++)
            {
                if ([myLatestVersion[i] integerValue] != 0)
                {
                    return YES;
                }
            }
            return NO;
        }
        else
        {
            return NO;
        }
    }
}

在后台获取Ionic / Cordova app中的位置

3 个答案: