我正在显示单击事件的详细信息。我已将所有事件存储在数组中。
当用户单击事件时,将传递其ID,该ID在数组内部进行检查,并将结果传递给服务。
showDetail(id){
let obj = this.events;
let newArr = Object.values(obj);
let result = newArr.filter(function(el) {
return el["id"] == id;
});
this.articleService.sendMessage(result);
let url = `/article/${id}`;
this.router.navigate([url]);
}
private detailSubject = new Subject<any>();
sendMessage(formData: any) {
this.detailSubject.next({formData});
}
getMessage(): Observable<any> {
return this.detailSubject.asObservable();
}
现在在我的文章/ ID页面中。 我无法检索此传递的数组。
我有以下代码
ngOnInit() {
this.articleService.getMessage().subscribe(
res => {
this.loadArticleDetail(res["formData"]);
},
error => {
console.log("Error loading data");
}
);
}
答案 0 :(得分:1)
this.articleService.sendMessage(result); // <-- Subject.next()
let url = `/article/${id}`;
this.router.navigate([url]); // <-- Subject.subscribe() after Subject.next(), so value already emitted
您已经添加了BehaviorSubject
标签。因此使用它。另外,getMessage(): Observable<any> {
除了返回Observable以外不执行任何操作。感到多余:
private detailSubject = new BehaviorSubject<any>(null);
message$ = this.detailSubject.asObservable();
sendMessage(formData: any) {
this.detailSubject.next({formData});
}
和
ngOnInit() {
this.articleService.message$.subscribe(...