that.setDate is not a function错误如何解决呢？求大神指导 - WXOPEN Club

getWeather: function(){
    var that = this;
    wx.request({
      url: 'https://free-api.heweather.com/s6/weather/now',
      data:{
        location:that.data.region[1],
        key:'07e21eda4e604f8dbce0d1'
      },
      success: function(res){
        that.setDate({
          now:res.data.HeWeather6[0].now
        });
      }