我有一个表Component,当用户选择特定行时,他被重定向到与团队组件不同的路径。 我想在组件提取服务的所有数据时加载新路由的视图。
如何防止视图从渲染到新组件OnInit方法中从Service获取整个数据的时间。 在角度1中有ngCloak如何在Angular 2中执行此操作。
我已经使用了ngIf但是一瞬间直到数据加载div弹出然后消失
我的表组件
onSubmit(team:any){
this.teamId = team._links.team.href.split('/').pop(-1);
this.competitionService.storeTeamCrest(team.crestURI);
this.router.navigate(['team', {id: this.teamId}]);
}
服务
storeTeamCrest(link:string){
this.teamCrest = link;
}
getPlayers(id:string){
let headers = new Headers();
headers.append('X-Auth-Token', 'XXX');
return this.http.get('https://api.football-data.org/v1/teams/'+id+'/players',{headers:headers}).map(response => response.json())
}
getFixtures(id:string){
let headers = new Headers();
headers.append('X-Auth-Token', '7c94f28bddf34648bd9a6f5c2e2da0f0');
return this.http.get('https://api.football-data.org/v1/teams/'+id+'/fixtures',{headers:headers}).map(response => response.json())
}
团队组件
ngOnInit(){
this.teamId = this.route.snapshot.params['id'];
this.teamCrest = this.competitionService.teamCrest;
this.getPlayers();
}
getPlayers(){
this.competitionService.getPlayers(this.teamId).subscribe(player => this.players = player.players);
}
团队组件模板
<div class="container">
<div class="row">
<div *ngFor="let player of players"#data>
<div class="col-md-4">
<div class="well box">
<img class="avatar" src="{{teamCrest}}">
<h4> {{player.name}} </h4>
<hr style="background-color:black;" />
<span class="label label-default"><strong>Position :</strong> {{player.position}} </span><br/>
<span class="label label-primary"><strong>Jersey Number :</strong> {{player.jerseyNumber}} </span><br/>
<span class="label label-success"><strong>Date Of birth :</strong> {{player.dateOfBirth}}</span><br/>
<span class="label label-info"><strong>Nationality :</strong> {{player.nationality}} </span><br/>
<span class="label label-warning"><strong>Contract Untill :</strong> {{player.contractUntil}}</span><br/>
<span class="label label-success"><strong>Market Value :</strong> {{player.marketValue}}</span><br/>
</div>
</div>
</div>
</div>
</div>
</div>
<div *ngIf="!players?.length">
<h3>No Player Data found For the Selected Team</h3>
</div>
答案 0 :(得分:3)
处理(完整)=&gt; {}回调内部订阅(Subscribe Docs)并将布尔值设置为true。使用* ngIf。
检查此布尔值所以,在你的团队组件中:
players:any[] = [];
loadCompleted:boolean = false;
ngOnInit(){
this.teamId = this.route.snapshot.params['id'];
this.teamCrest = this.competitionService.teamCrest;
this.getPlayers();
}
getPlayers(){
this.loadCompleted = false;
this.competitionService.getPlayers(this.teamId)
.subscribe(
player => this.players = player.players,
(error) => console.error(error),
() => this.loadCompleted = true)
);
}
然后在您的HTML模板中:
<div *ngIf="loadCompleted" class="container">
<div class="row">
<div *ngFor="let player of players" #data>
<div class="col-md-4">
<div class="well box">
<img class="avatar" src="{{teamCrest}}">
<h4> {{player.name}} </h4>
<hr style="background-color:black;" />
<span class="label label-default"><strong>Position :</strong> {{player.position}} </span><br/>
<span class="label label-primary"><strong>Jersey Number :</strong> {{player.jerseyNumber}} </span><br/>
<span class="label label-success"><strong>Date Of birth :</strong> {{player.dateOfBirth}}</span><br/>
<span class="label label-info"><strong>Nationality :</strong> {{player.nationality}} </span><br/>
<span class="label label-warning"><strong>Contract Untill :</strong> {{player.contractUntil}}</span><br/>
<span class="label label-success"><strong>Market Value :</strong> {{player.marketValue}}</span><br/>
</div>
</div>
</div>
</div>
</div>
</div>
<div *ngIf="loadCompleted && !players?.length">
<h3>No Player Data found For the Selected Team</h3>
</div>
如果我理解你的问题,这应该做你想要的。 只是旁注:在你的后端服务中,恕我直言,如果没有输入teamId的播放器,你应该不返回null,而是一个空的List / Array /无论如何。