showDanMu:function(num){

var that = this;

setInterval(function () {

var danmulist = that.data.danmulist;

if (danmulist && danmulist.length > 0) {

if (num == danmulist.length) {

num = 0;

that.setData({ showdanmu: true, danmuname:danmulist[num].msgame, danmuhead: danmulist[num].avatarUrl })

setTimeout(function () {

that.setData({ showdanmu: false })

},3000)

} else {

that.setData({ showdanmu: true, danmuname: danmulist[num].msg, danmuhead: danmulist[num].avatarUrl })

setTimeout(function () {

that.setData({ showdanmu: false })

},3000);

num++;

}

}

},5000)

},

onShow: function (e) {

var that=this;

var num=0;

// 调用弹幕

that.showDanMu(num);

},

小程序未退出，我每按一次关机键在看小程序，弹窗连续显示就会增加一个（原本只会显示一个），为什么？