javascript - Angular 6 : Not able to inject a service in dynamic component using JIT compilation

Question

我正在尝试在我正在创建的动态组件中注入(inject)一个服务，但是当我尝试注入(inject)一个服务时出现错误。我能够在所有其他使用 AOT 的组件中注入(inject)服务，但在我使用 JIT 时却不能。这是代码。

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

@Injectable
export class ApplicantSvc
{
 name:string;  
}

private createComponentFromRaw(template: string){

  const tmpCmp = Component({ template })(class {

    constructor(private app :ApplicantSvc){}

  });

  // Now, also create a dynamic module.
  const tmpModule = NgModule({
    declarations: [tmpCmp],
    imports: [CommonModule],
    providers: [ApplicantSvc],

  })(class {});


  this.compiler.compileModuleAndAllComponentsAsync(tmpModule)
    .then((factories) => {
      const f = factories.componentFactories[0];
      this.cmpRef = f.create(this.injector, [], null, this.moduleRef);
      this.cmpRef.instance.name = 'my-dynamic-component';
      this.vc.insert(this.cmpRef.hostView);
    });
}

在上面的代码中，我在动态模块中为提供者添加了 ApplicantSvc，然后注入(inject)了动态组件构造函数，但每当我尝试这样做时，我都会收到错误

ERROR Error: Can't resolve all parameters for class_1: (?). ..... ..... at JitCompiler.push../node_modules/@angular/compiler/fesm5/compiler.js.JitCompiler._loadModules (compiler.js:22570)

Answer 1

我发现像传递变量一样简单地传递服务就可以了

  this.compiler.compileModuleAndAllComponentsAsync(tmpModule)
    .then((factories) => {
      const f = factories.componentFactories[0];
      this.cmpRef = f.create(this.injector, [], null, this.moduleRef);
      this.cmpRef.instance.name = 'my-dynamic-component';
      ̶t̶h̶i̶s̶.̶v̶c̶.̶i̶n̶s̶e̶r̶t̶(̶t̶h̶i̶s̶.̶c̶m̶p̶R̶e̶f̶.̶h̶o̶s̶t̶V̶i̶e̶w̶)̶;̶
      𝘁𝗵𝗶𝘀.𝗰𝗺𝗽𝗥𝗲𝗳.𝗶𝗻𝘀𝘁𝗮𝗻𝗰𝗲.𝗮𝘄𝗲𝘀𝗼𝗺𝗲𝗦𝗲𝗿𝘃𝗶𝗰𝗲 = 𝘁𝗵𝗶𝘀.𝗺𝘆𝗔𝘄𝗲𝘀𝗼𝗺𝗲𝗦𝗲𝗿𝘃𝗶𝗰𝗲        
});