Question

我正忙着一个小型条码扫描器应用程序，它有一个SettingsComponent，可以设置本地IP。该应用程序构建没有问题，但当它在genymotion模拟器上部署时，我得到以下错误。它似乎无法找到SettingsComponent，即使我在app.module.ts中导入它...（它被添加到“... 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这个问题？

我的错误：

“主”线程上发生了未被捕获的异常。   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SettingsComponent不是任何NgModule的一部分，或者模块尚未导入模块。   文件：“/ data / data / arch.nativescript.barcodescanner / files / app / tns_modules / @ angular/compiler/bundles/compiler.umd.js，line：17126，column：14

StackTrace：

框架：功能：'RuntimeCompiler._createCompiledHostTemplate'，file：'/ data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js'，line：17126 ，专栏：21 框架：功能：''，file：'/ data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js'，line：17085，column：39 框架：功能：''，文件：'/ data/data/org.nativescript.barcodescanner/files/app/tns_modules/@angular/compiler/bundles/compiler.umd.js'，行：17083，col

my settings.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
];

Answer 1

稍微猜一下，但我认为app.module.ts应该进行此导入：import { AppSettingsService } from './services/app-settings.service';（请注意大写＆＃39; A＆＃39;）并且您需要将AppSettingsService添加到列表中providers在同一个班级。

Angular2 / nativeScript：奇怪的错误抱怨未导入任何模块的组件，即使它已导入主模块

1 个答案: