'undefined' is not an object error when trying to use background service

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Hi,

I am making a simple alarm clock. I found that the alarm stops when I use other apps on iPhone, so I would like to keep counting as a background service.

I simply added code as below, but I got an error message saying "Script Error = 'undefined' is not an object (evaluating 'Titanium.App.iOS') at ui.js (line 241)" Do you have tips on how to fix it ?

[on ui.js]

    var service = Titanium.App.iOS.registerBackgroundService({
        url:'bkcountdown.js'        
    });

[on bkcountdown.js] located in the same folder with ui.js

if(button.flag ="1"){
//button.flag=1 indicates that the count-down is on-going.
timer = setInterval(countdown, 1000);
}

1 Answer

did you do a clean of the project a force a complete application rebuild?

— answered 10 months ago by Aaron Saunders
answer permalink
4 Comments

  • Thank you for your advice. It started counting down !

    But I got another problem ..... After launching other apps, I tried going back to the original app. I got an error message as below: Application Error Could not find the file bkcountodown.js

    After I pressed Dismiss, I could see countdown was actually progressing, so obviously bkcoundtodwn.js exists and it background count-down is working. I have no idea why i am being told "Could not find the file bkcountdown.js".

    I would really appreciate one more piece of advice. Thank you !!

    — commented 10 months ago by Yuichi Kato

  • where is the sample code so maybe we can run the project and see if this is reproduceable

    — commented 10 months ago by Aaron Saunders

  • Thanks Aaron for your kind attention. Here is the code.

    [bkcountdown.js]

    if(button.flag ="1"){ timer = setInterval(countdown, 1000); }

    [ui.js]

    (function(){

    app.ui = {};

var style = {
    barColor: '#000',
    backgroundColor: '#000'
};


app.ui.createApplicationTabGroup = function(){
    Titanium.UI.setBackgroundColor('#000');

    var tabGroup = Ti.UI.createTabGroup();

    var tab1 = app.ui.createStopWatchTab();
    var tab2 = app.ui.createHowToPlayTab();

    tabGroup.addTab(tab1);
    tabGroup.addTab(tab2);

    return tabGroup;
};


app.ui.createStopWatchTab = function(){

    var win = Titanium.UI.createWindow({
        title: 'Nap Timer',
        barColor: style.barColor,
        backgroundColor: style.backgroundColor
    });
    var tab = Titanium.UI.createTab({
        icon: 'dark_clock.png',
        title: 'Nap Timer',
        window: win
    });


    var label = Ti.UI.createLabel({
        text: '15:00',
        color: 'white',
        width: 'auto', height: 'auto', top: 30, 
        font: {fontSize: 30, fontWeight: 'bold'}
    });
    win.add(label);

    var button = Ti.UI.createButton({
        title: 'Start',
        backgroundImage:'blue_pill.gif',
        width: 150,
        height: 60,
        top: 120,
        color: 'white',
        font:{fontWeight:'bold',fontSize:30},
    });
    win.add(button);

    var button5min = Ti.UI.createButton({
        title: '5 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 60,
        left: 40,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button5min);

    var button10min = Ti.UI.createButton({
        title: '10 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 60,
        left: 120,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button10min);

    var button15min = Ti.UI.createButton({
        title: '15 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 60,
        left: 200,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button15min);

    var button30min = Ti.UI.createButton({
        title: '30 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 20,
        left: 40,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button30min);

    var button60min = Ti.UI.createButton({
        title: '60 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 20,
        left: 120,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button60min);

    var button90min = Ti.UI.createButton({
        title: '90 Min',
        color: 'black',
        width: 70, height: 30,
        bottom: 20,
        left: 200,
        font:{fontWeight:'bold',fontSize:20},
    });
    win.add(button90min);


    button5min.addEventListener('click', function(){
        usersetTime =  5 * 60;
        label.text ="5:00";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        button.title = "Start";
    })

    button10min.addEventListener('click', function(){
        usersetTime =  10 * 60;
        label.text ="10:00";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        button.title = "Start";
    })

    button15min.addEventListener('click', function(){
        usersetTime =  15 * 60;
        label.text ="15:00";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        button.title = "Start";
    })

    button30min.addEventListener('click', function(){
        usersetTime =  30 * 60;
        label.text ="30:00";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        button.title = "Start";
    })

    button60min.addEventListener('click', function(){
        usersetTime =  60 * 60;
        label.text ="60:00";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        button.title = "Start";
    })

    button90min.addEventListener('click', function(){
        usersetTime =  90 * 60;
        label.text ="90:00";
        button.title = "Start";
        durationTime = 0; //????????,????0
        currentTime = usersetTime - durationTime;
        var button;
        button.title = "Start";
    })

    var setminute = 0.1;
    var usersetTime =  setminute * 60; 
    var durationTime = 0; 
    var currentTime = usersetTime - durationTime;   
    var timer;
    var sound = Ti.Media.createSound({url:"el_alarm.mp3"});

    function countdown(){   
                    if(currentTime>0){
                        durationTime = durationTime + 1;
                        currentTime = usersetTime - durationTime;
                        var minute = Math.floor(currentTime/60);
                        var sec = Math.floor(currentTime - minute*60);
                        label.text = minute + ":" + ("0" + sec).slice(-2);
                    }
                    else{
                        stopcountdown();
                        sound.looping = true;
                        sound.play();
                        label.text = "Wake up !";
                        button.title="OK";
                        button.flag="2";
                    }                   
    }

    function startcountdown(){
        timer = setInterval(countdown, 1000);
        button.title="Stop";
        button.flag="1";
    }

    function stopcountdown(){
        clearInterval(timer);
        button.title = "Start";
        button.flag="0";
    }

    function resetcountdown(){
        sound.stop();
        button.flag="0";
    }


    button.flag = "0" 
    button.addEventListener('click', function(){

        if(button.flag=="1"){
            stopcountdown();
        }

        else if(button.flag=="0"){
            startcountdown();
            button.title = "Stop";        
        }

        else if(button.flag=="2"){
            resetcountdown();
            label.text = "Select timer";
            button.title = "Stopped"; 
        }

    });

    var service = Titanium.App.iOS.registerBackgroundService({
        url:'bkcountdown.js'        
    });


return tab;
};


app.ui.createHowToPlayTab = function(){

    var win = Titanium.UI.createWindow({
        title: 'Instruction',
        barColor: style.barColor,
        backgroundColor: style.backgroundColor
    });
    var tab = Titanium.UI.createTab({
        icon: 'dark_info.png',
        title: 'Instruction',
        window: win
    });


    var web = Ti.UI.createWebView({
        url: '/how_to_play.html'
    });
    win.add(web);

    return tab;
}

    })();

    — commented 10 months ago by Yuichi Kato

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