ionic4的路由传参和modal传参

一、路由传参

1.普通参数

例：perfect-self页面跳转到gongsi-organization页面传递参数store_id和store_name
perfect-self.page.ts

import { Router } from '@angular/router';
...
constructor(
	public router: Router,
){}
...
this.router.navigate(['gongsi-organization'], {
              queryParams: {
                store_id: this.storeinfo.store_id,
                store_name: this.storeinfo.store_name,
              }
            });

gongsi-organization.page.ts

import { ActivatedRoute, Params } from '@angular/router';
...
constructor(
    public activated: ActivatedRoute,
  ) { 
    this.activated.queryParams.subscribe((params: Params)=>{
      this.store_id = params['store_id'];
      this.store_name = params['store_name'];
    })
  }

tips:接收参数时ionic3用的是NavParams,ionic4里只有modal组件才能用,否则会报错NullInjectorError: No provider for NavParams!

2.复杂参数

在跳转页面时传递resolve方法时遇到的，直接用queryParams传递得到的是一个字符串，可以用一个公共service分别注入这两个页面来共享参数
例：tabs页跳转到login页
公共service,getset.ts

import { Injectable } from '@angular/core';

@Injectable()
export class GetSet {
    public param: any;
    set(param) {
        this.param = param;
    }
    get() {
        return this.param;
    }
}

tabs.page.ts

...
constructor(public getset: GetSet) {}
...
new Promise((resolve,reject)=>{
      this.getset.set(resolve);
      this.router.navigate(['login']);
    }).then((res)=>{

    })

login.page.ts

this.activeRoute.queryParams.subscribe((params: Params)=>{
      this.resolve = params['resolve'];
      console.log('this.resolve_constructor');
      console.log(typeof this.resolve);
      console.log(this.resolve);
    })
    console.log('this.getset.get');
    console.log(typeof this.getset.get());
    console.log(this.getset.get());

打印出来的结果是(一个是string，一个是function.):

二、弹出框modal传参

例：在problem-submission页弹出modal页eject-phonebook
1.给弹出的modal页面传值
problem-submission.page.ts

async eject_cont(type) {
    const addModal = await this.ModalController.create({
      component: EjectPhonebookPage,
      componentProps: {
      //传参
        params: datas,
      }
    })
    await addModal.present();
    //监听销毁的事件，接收返回的值
    const { data } = await addModal.onDidDismiss();
}

2.modal页面接收传过来的值
eject-phonebook.page.ts

import { NavParams } from '@ionic/angular';
constructor(public navParams: NavParams) {
this.get = this.navParams.get('params');
}

3.modal页面关闭时传回值
eject-phonebook.page.ts

import { ModalController } from '@ionic/angular';
...
constructor(public modalCtrl: ModalController) { }
...
this.modalCtrl.dismiss({
    status: -1,
    item  :null
  });

或者

this.navParams.data.modal.dismiss({
    status: -1,
    item  :null
  });

4.接收关闭的modal传回的值
problem-submission.page.ts

    const { data } = await addModal.onDidDismiss();

tips:ionic3里是用viewcontroller关闭，不能用在ionic4