活动：修复问题

shared/domain/activityField/thirtyDaysField.ts

@@ -119,7 +119,7 @@ export class ThirtyDaysData extends ActivityBase {
     totalPoint: number = 0;//总共点数
 
     public findTaskByType(type: number) {
-        let task = [];
+        let task: ThirtyDaysItem[] = [];
         for (let i = 0; i < this.list.length; i++) {
             let items = this.list[i].item;
             for (let itemData of items) {