【问题标题】:Angular2/nativeScript: Strange error complaining about a component that's not imported into any module even though it is imported in the main moduleAngular2/nativeScript:奇怪的错误抱怨一个组件没有被导入任何模块,即使它是在主模块中导入的
【发布时间】:2017-01-05 21:35:31
【问题描述】:

我正忙于一个小型条码扫描器应用程序,它有一个可以设置本地 IP 的 SettingsComponent。该应用程序构建没有问题,但是当它部署在 genymotion 模拟器上时,我收到以下错误。即使我将它导入到我的 app.module.ts... 中,它似乎也找不到 SettingsComponent (它被添加到下面的“...NavigatableComponents”代码中的声明数组中)。知道为什么会发生这种情况以及如何解决它吗?

我的错误:

“主”线程上发生未捕获的异常。 java.lang.RuntimeException:无法恢复活动 {org.nativescript.barcodescanner/com.tns.NativeScriptActivity}:com.tns.NativeScriptException: 调用 js 方法 onCreateView 失败

错误:组件设置组件不是任何 NgModule 的一部分,或者该模块尚未导入到您的模块中。 文件:“/data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js,行:17126,列:14

堆栈跟踪:

框架:函数:'RuntimeCompiler._createCompiledHostTemplate',文件:'/data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js',行:17126 , 栏目: 21 框架:函数:'',文件:'/data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js',行:17085,列:39 框架:函数:'',文件:'/data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js',行:17083,列

我的设置.html:

<StackLayout class="page">
<Label class="h1 title m-x-auto " text="Settings"></Label>
<StackLayout class="form" *ngIf="!IPSaved">
<TextField class="form-input border" placeholder="Enter IP"></TextField>
<Button class="btn btn-primary" text="Submit"></Button>
</StackLayout>
<StackLayout *ngIf="IPSaved">
    <Label class="h1" text="IP Submitted successfully"></Label>
    <Button class="btn btn-primary" text="Done" [nsRouterLink]="['/home']"></Button>
</StackLayout>
</StackLayout>

我的 settings.component.ts:

import { Component,} from '@angular/core';

import { RestService } from '../../services/rest.service';
import { AppSettingsService } from '../../services/app-settings.service';

@Component({
  selector: 'settings',
  templateUrl: './pages/settings/settings.component.html'
})
export class SettingsComponent {
  ipSaved: boolean;

  constructor(private restService: RestService, private appSettingsService: AppSettingsService) {

  }

    submitIP(ip: string) {
        this.appSettingsService.saveLocalIP(ip);
        this.restService.init(ip);
        this.ipSaved = true;
    }

}

我的 app.module.ts:

import { NgModule, ValueProvider } from "@angular/core";
import { NativeScriptFormsModule } from "nativescript-angular/forms";
import { NativeScriptModule } from "nativescript-angular/platform";
import { NativeScriptRouterModule } from 'nativescript-angular/router'
import { NativeScriptHttpModule } from 'nativescript-angular/http';


import { BarcodeScanner } from "nativescript-barcodescanner";
import { RestService } from './services/rest.service';
import { appSettingsService } from './services/app-settings.service';
import { AppComponent } from "./app.component";
import { HomeComponent } from "./pages/home/home.component";
import { CheckBarcodesComponent } from './pages/check-barcodes/check-barcodes.component';
import { SettingsComponent } from './pages/settings/settings.component';

import { routes, navigatableComponents } from './app.routing';
@NgModule({
    imports : [
    NativeScriptModule,     
    NativeScriptFormsModule ,
    NativeScriptHttpModule,
    NativeScriptRouterModule,
    NativeScriptRouterModule.forRoot(routes)
    ],
    declarations : [
    AppComponent,   
    ...navigatableComponents
    ],
    providers : [
    RestService,
    BarcodeScanner],
    bootstrap : [AppComponent]      
})
export class AppModule {}

我的 app.routing.ts:

import { AppComponent } from './app.component';
import { HomeComponent } from './pages/home/home.component';
import { CheckBarcodesComponent } from './pages/check-barcodes/check-barcodes.component';
import { SettingsComponent } from './pages/settings/settings.component';

export const routes = [
    {path: "", component: HomeComponent},
        {path: "checkBarcodes", component: CheckBarcodesComponent},
            {path: "settings", component: SettingsComponent}
];

export const navigatableComponents = [
HomeComponent,
CheckBarcodesComponent,
SettingsComponent
];

【问题讨论】:

    标签: angular nativescript


    【解决方案1】:

    猜测了一下,但我认为app.module.ts 应该有这个导入:import { AppSettingsService } from './services/app-settings.service';(注意大写'A')并且您需要将AppSettingsService 添加到同一类中的providers 列表中。

    【讨论】:

    • 感谢@Eddy Verbruggen 做到了:)
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