角错误:StaticInjectorError(平台:核心)[e-> t]: [英] Angular Error : StaticInjectorError (Platform: core)[e -> t]:

问题描述

当我使用--prod构建APK时，出现以下错误

    ERROR Error: StaticInjectorError[e -> t]: 
  StaticInjectorError(Platform: core)[e -> t]: 
    NullInjectorError: No provider for t!
    at e.get (core.js.pre-build-optimizer.js:8894)
    at core.js.pre-build-optimizer.js:9139
    at e (core.js.pre-build-optimizer.js:9083)
    at e.get (core.js.pre-build-optimizer.js:8980)
    at core.js.pre-build-optimizer.js:9139
    at e (core.js.pre-build-optimizer.js:9083)
    at e.get (core.js.pre-build-optimizer.js:8980)
    at Ua (core.js.pre-build-optimizer.js:21119)
    at e.get (core.js.pre-build-optimizer.js:21808)
    at Ts (core.js.pre-build-optimizer.js:22179)

但是与Ionic Cordova一起构建android还是可以的，它也可以与ng serve一起工作；但是我在ng serve --prod"上遇到了同样的错误.

我该如何解决?

解决方案

您正尝试使用未在AppModule提供程序中或component.ts内部列出的服务.将服务添加到提供商列表以使其正常运行.

在app.modules中，如果您希望该服务是全局的(与应用程序上下文有关).

@NgModule({
    declarations: [...],
    imports: [...],
    bootstrap: [...],
    entryComponents: [...],
    providers: [
        MyService
    ]
})

或者在您的component.ts中，如果您希望该服务与所需的组件相关联.

@Component({
    selector: '...',
    templateUrl: '...',
    providers: [MyService]
})

不要在两个文件中都添加它.同样，当您将服务注入app.modules或component中时，也不要忘记导入该服务.

import { MyService } from '../services/myservice';

这个问题也可以为您提供帮助:错误:没有提供t的提供者

As I am build the APK with --prod I am getting the error below

    ERROR Error: StaticInjectorError[e -> t]: 
  StaticInjectorError(Platform: core)[e -> t]: 
    NullInjectorError: No provider for t!
    at e.get (core.js.pre-build-optimizer.js:8894)
    at core.js.pre-build-optimizer.js:9139
    at e (core.js.pre-build-optimizer.js:9083)
    at e.get (core.js.pre-build-optimizer.js:8980)
    at core.js.pre-build-optimizer.js:9139
    at e (core.js.pre-build-optimizer.js:9083)
    at e.get (core.js.pre-build-optimizer.js:8980)
    at Ua (core.js.pre-build-optimizer.js:21119)
    at e.get (core.js.pre-build-optimizer.js:21808)
    at Ts (core.js.pre-build-optimizer.js:22179)

But it working fine with Ionic Cordova build android also it working with ng serve; but I am getting the same above error with ng serve --prod".

How can I resolve this?

解决方案

You are trying to use a service that is not listed in providers of your AppModule or inside you component.ts. Add the service to a providers list to make it work.

In app.modules if you want that service to be global (related to app context).

@NgModule({
    declarations: [...],
    imports: [...],
    bootstrap: [...],
    entryComponents: [...],
    providers: [
        MyService
    ]
})

Or in your component.ts if you want that service to be contextual to desired component.

@Component({
    selector: '...',
    templateUrl: '...',
    providers: [MyService]
})

Do not add it in both files. Also don't forget to import that service when you inject it either in app.modules or component.

import { MyService } from '../services/myservice';

This question also may help you: Error: No provider for t

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