javascript - *ng用于数组的动态字符串插值

Question

实际上我有这样的情况，我想动态更改数组循环。

export interface City { 
   street: Street[];
   country: Country[];
}

<div>
    <div (click)="OnClick()">Street</div>
    <div (click)="OnClick()">Country</div>
</div>

<div *ngIf="clicked">       
         <div *ngFor="let c of city.street">    
              <div>
                {{c.name}}          
              </div>        
         </div>  
</div>

如果用户单击街道，街道的值应该循环。

expected: *ngFor="let c of city.street"

如果用户单击国家/地区，则国家/地区的值应该循环。

expected: *ngFor="let c of city.country"

我尝试过以下方法:

<div>
    <div (click)="OnClick('street')">Street</div>
    <div (click)="OnClick('country')">Country</div>
</div>

<div *ngIf="clicked">       
         //Porperty Binding
         <div *ngFor="let c of city.{{onClickParameter}}">  
              <div>
                {{c.name}}          
              </div>        
         </div>  
</div>

它确实有效(模板解析错误，因为城市。{{}}) 还有其他解决方案吗？

Answer 1

您可以使用组件函数来处理它:

//Component
export interface City { 
 street: Street[];
 country: Country[];
}

export class MyComponent {
  public selected : string = 'street';
  public city: City;

  OnClick(select: string) {
    this.selected = select;
  }

}

// You HTML

<div>
  <div (click)="OnClick('street')">Street</div>
  <div (click)="OnClick('country')">Country</div>
</div>

<div *ngIf="clicked">       
  <div *ngFor="let c of city[selected]">  
    <div>{{c.name}}</div>
  </div>  
</div>