Question

当我使用以下命令运行Angular 2项目时出错：

Caman('#canvasimg', img, function() {
  this.revert(false);
  this.hue(hue).contrast(cntrst).vibrance(vibr).sepia(sep).render();
});

堆栈追踪：

ng serve -aot

该应用适用于ERROR in ./src/app/app.module.ngfactory.ts Module build failed: Error: /Users/iguissouma/IdeaProjects/myproject/frontend/src/app/shared/services/message.service.ts (9,5): Public property 'messageSource$' of exported class has or is using name 'Observable' from external module "/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/rxjs/Observable" but cannot be named.) at _transpile (/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/@ngtools/webpack/src/loader.js:101:19) at /Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/@ngtools/webpack/src/loader.js:128:26 at tryCatch (/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/es6-promise/dist/lib/es6-promise/-internal.js:195:12) at invokeCallback (/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/es6-promise/dist/lib/es6-promise/-internal.js:210:13) at publish (/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/es6-promise/dist/lib/es6-promise/-internal.js:178:7) at flush (/Users/iguissouma/IdeaProjects/myproject/frontend/node_modules/es6-promise/dist/lib/es6-promise/asap.js:94:5) at nextTickCallbackWith0Args (node.js:420:9) at process._tickCallback (node.js:349:13) @ ./src/main.ts 4:0-64 @ multi main

如何解决问题？

message.service.ts

ng serve

Answer 1

我修改了message.service.ts，如下所示为字段声明显式类型：

import { Injectable } from '@angular/core'
import { Subject } from 'rxjs/Subject';
import { Message } from 'primeng/primeng';
import { Observable } from 'rxjs/Rx';

@Injectable()
export class MessageService {
    messageSource:Subject<Message> = new Subject<Message>();

    messageSource$:Observable<Message> = this.messageSource.asObservable();

    info(summary : string, detail : string) {
        this.messageSource.next({severity:'info', summary: summary, detail: detail});
        console.log("INFO: " + summary + " DETAIL: " + detail);
    }

    error(summary : string, detail : string) {
        this.messageSource.next({severity:'error', summary: summary, detail: detail});
        console.log("ERROR: " + summary + " DETAIL: " + detail);
    }
}

在Angular 2项目中运行ng serve -aot命令时出错

1 个答案: