uniapp的loadding

methods: {
    fangfa(){
        var that = this;
        uni.showLoading({title: '加载中',mask:true});
        uni.request({
          url:'',
          data: {},
          method: 'POST',
          header: '',
          dataType: 'json',
          success: function (res) {
            //关闭加载中
            setTimeout(function () {uni.hideLoading();}, 100);
          }
        })
    },
}