### 下拉刷新操作
`more-movie.json`
~~~json
{
"enablePullDownRefresh":"true"
}
~~~
`more-movie.js`
~~~javascript
onPullDownRefresh: function (event) {
var refreshUrl = this.data.requestUrl +"?star=0&count=20";
this.data.movies = {};
this.data.isEmpty = true;
util.http(refreshUrl, this.processDoubanData);
wx.showNavigationBarLoading();
},
~~~
