下面的代码近乎没什么逻辑，但运行10几分钟后，就被杀掉了是怎么回事儿？

手机：一加5

app.json里设置了：

“requiredBackgroundModes”:[“location”],

“permission”:{

“scope.userLocation”:{

“desc”“你的位置信息将用于 GPS信息获取”

}

}

wx.startLocationUpdateBackground({

success:function(res){

var dateline = Date.now();

dateline = util.formatTime(newDate(dateline));

var msg = dateline + ’ 开启持续定位，成功’

textContent.unshift(msg);

thisPage.setData({

textContent: textContent

});

wx.onLocationChange(function (res) {

var dateline = Date.now();

dateline = util.formatTime(newDate(dateline));

var msg = dateline+" 纬度：" + res.latitude + “\n经度：” + res.longitude + ‘,速度：’ + res.speed + ‘,高度：’ + res.altitude;

console.log(msg);

if (textContent.length >= 50) textContent.pop();

textContent.unshift(msg);

thisPage.setData({

textContent: textContent

});

})

},

fail: function (res){

var dateline = Date.now();

dateline = util.formatTime(newDate(dateline));

var msg = dateline + ’ 开启持续定位，失败’

textContent.unshift(msg);

thisPage.setData({

textContent: textContent

});

}

})

},