解决element数组响应式重绘制问题

 this.$set(this, 'searchList', []);
            this.$nextTick(() => {
              searchList[2] = {
                key: "EventTime",
                value: undefined,
                type: "date-range",
                timeType: dateType,//显示的类型
                title: "选择范围",
                rangeSeparator: "-",
                // placeholder: '请选择查询的范围',
                valueFormat: dateFormatType,
                span: 8,
                onChange: (value) => {
                  console.log(value, '000');
                  this.$emit('EventDate', value)
                },
              }
              this.$set(this, 'searchList', searchList);
            })