ionic Uncaught (in promise): Error: StaticInjectorError[NavController]

╰+攻爆jí腚メ 2022-06-01 10:14 168阅读 0赞

在服务(provider)中t引入NavController时出现错误：Uncaught (in promise): Error: StaticInjectorError\[NavController\]

默认情况下不能在controller 或者service中使用navcontroller或者viewcontroller之类的。

其中代码：

![SouthEast][]

![SouthEast 1][]

一个比较容易解决的方法，

import { HttpClient } from '@angular/common/http';
    import { Injectable } from '@angular/core';
    import { NavController, AlertController, App } from 'ionic-angular';
    import {LoginPage} from "../pages/login/login";
    @Injectable()
    export class CommonProvider {
    
        public session:any;
        constructor(
            public http: HttpClient, 
            public alertCtrl: AlertController, 
            public appCtrl : App
        ) {}
    
        public getSession() {
            let activeNav: NavController = this.appCtrl.getActiveNav();
            this.session = window.localStorage.getItem('session');
            if(!this.session) {
                activeNav.setRoot(LoginPage);
                return false;
            }
            return this.session;
        }

参考：https://www.cnblogs.com/wupeng88/p/8340947.html

[SouthEast]: /images/20220601/2e3618901c2a465ba59b6f4ac3d59594.png
[SouthEast 1]: /images/20220601/41d04548de0a41398e8d2b467ab4d517.png