angular – 从另一个组件调用组件中的函数

共享服务：

@Injectable()
export class Sharedservice {

    componentOneFn: Function;

    constructor() { }
}

第一部分：

export class ComponentOne {

    name: String = 'Component one';

    constructor(private sharedservice: SharedservicE) {
        this.sharedservice.componentOneFn = this.sayHello;
    }

    sayHello(callerName: String): void {
        console.log(`Hello from ${this.namE}. ${CallerNamE} just called me!`);
    }
}

第二部分：

export class ComponentTwo {

    name: String = 'Component two';

    constructor(private sharedservice: SharedservicE) {
        if(this.sharedservice.componentOneFn) {
            this.sharedservice.componentOneFn(this.Name); 
            // => Hello from Component one. Component two just called me!
        }
    }
}

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