如何在 Titanium 中播放時將 go 后退 5 秒，單擊按鈕時應該會發生這種情況

Question

我有以下代碼。

var file = recording.stop(); 
sound = Titanium.Media.createSound({sound:file});

sound.play();

sound.getTime(); // This will return the current time position of the audio.

var goBack = Titanium.UI.createButton({title:'Go Back',height:40,width:200,top:230});
goBack.addEventListener('click',function(){
      if(sound.playing){
        Ti.API.info(sound.getTime()); // If this prints 25 secs.
       }
});
win.add(goBack);

假設當前的getTime()返回 25，我需要在單擊按鈕時從 20 秒開始播放音頻。

我該怎么做呢？

我可以使用這樣的東西

setTime = sound.getTime() - 5

但是我們如何將浮點值傳遞給 sound.setTime？

還有有沒有什么辦法可以添加搜索欄來指示聲音 object 的播放狀態？

Answer 1

您可以像這樣設置時間值：

sound.time = 20.0; // assuming that you want to start the sound from 20th second.

您可以像這樣添加進度條：

     var pb = Titanium.UI.createProgressBar({
            min:0,
            value:0,
            width:200
      });

     //when you play the sound set
     pb.max = sound.duration;

    // when your sound is complete

    sound.addEventListener('complete', function()
    {
        pb.value = 0;
    });

    // and also add this code to your file

    //INTERVAL TO UPDATE PB


    var i = setInterval(function()
    {
        if (sound.isPlaying())
        {
            Ti.API.info('time ' + sound.time);
            pb.value = sound.time;

        }
    },500);


    //  CLOSE EVENT - CANCEL INTERVAL
    win.addEventListener('close', function()
    {
        clearInterval(i);
    });