javascript - 为 *ngFor 内的项目赋值

Question

我有一个使用 *ngFor 的玩家列表

// Get all players.
getPlayers() {
  this.httpService.getPlayers()
  .subscribe(
    player => {
      this.players = player;

      for (let i in this.players){
        if(this.players[i].Main_Image_ID){
          this.getPlayerIMG(this.players[i].Main_Image_ID);
        }
      }
    },
    error => this.errorMessage = <any>error);
}

<div ion-item *ngFor="let player of players">
  <img *ngIf="player?.playerIMG" width="50" [src]="'data:image/png;base64,'+playerIMG" />
  <img *ngIf="!player?.playerIMG" width="50" src="./assets/images/no-image.jpg" />
  {{player.First_Name}} {{player.Last_Name}}
</div>

API 调用返回的值返回具有多个玩家的对象数组。每个玩家都有一些信息和一个 imageID。在我订阅电话并获取球员后，列表将被填充。然后，我使用 imageID 调用另一个 API 来获取图像。我的目标是在了解所有玩家及其图像 ID 后，用他们的图像填充列表中相应玩家的图像。

// Get image for player.
getPlayerIMG(id) {
  this.httpService.getPlayerIMG(id)
  .subscribe(
    playerIMG => {
      this.player.playerIMG = playerIMG;
    },
    error => this.errorMessage = <any>error);
}

问题是如何将每个 imageID 调用的响应分配给列表(玩家)上的相应项目(玩家)。

谢谢!

Answer 1

最好为播放器编写一个组件，但您可以使用此代码并将播放器传递给函数而不是 Main_Image_ID

for (let i in this.players){
    if(this.players[i].Main_Image_ID){
      this.getPlayerIMG(this.players[i]);
    }
}

// Get image for player.
getPlayerIMG(player) {
   this.httpService.getPlayerIMG(player.Main_Image_ID)
   .subscribe(
      playerIMG => {
        player.playerIMG = playerIMG;
      },
      error => this.errorMessage = <any>error);
}