wx.showLoading({ title: '正在获取位置'}); 
wx.getLocation({
    type: 'gcj02',
    isHighAccuracy:false,
    highAccuracyExpireTime: 3100,
    success: function (res) {
      wx.hideLoading();
      //success..
    },
    fail: function (res) {
      wx.hideLoading();
      //fail...
    }
 })