#鸿蒙通关秘籍#如何在HarmonyOS NEXT中实现页面跳转时传递类对象？

在HarmonyOS NEXT中，使用Navigation实现页面跳转时，可以通过class-transformer插件来传递类对象，并调用对象的方法。以下是具体步骤：

1. 在oh-package.json5中添加class-transformer插件的依赖：

   "dependencies": {
       "class-transformer": "^0.5.1"
   }
   

2. 在页面中导入class-transformer库：

   import { plainToClass } from "class-transformer";
   

3. 定义要传递的类，例如：

   export class UserBookingInfo {
       userName: string = '张山';
       userID: string = '332045199008120045';
       seatNo: string = '6A';
       constructor(name: string, id: string, seatNo: string) {
           this.userName = name;
           this.userID = id;
           this.seatNo = seatNo;
       }
       
       getUserInfo() {
           AlertDialog.show({ message: `用户信息为 姓名: ${this.userName}, 身份证号： ${this.userID}, 座位号： ${this.seatNo}`, alignment: DialogAlignment.Center});
       }
   }
   

4. 将传递过来的参数通过class-transformer的plainToClass方法转化为类对象：

   let bookingString: string = this.pageStack.getParamByName('NavigationParameterTransfer')[0] as string;
   let userBookingTmp: UserBookingInfo = JSON.parse(bookingString);
   this.userBooking = plainToClass(UserBookingInfo, userBookingTmp);