如何在离子2中单击时禁用显示在动态列表中的按钮

时间:2018-05-10 11:28:04

标签: ionic2

 <ion-card *ngFor="let product of products" no-padding>
   <ion-item>
      <ion-select [(ngModel)]="qty" *ngIf="product.type==variable" [disabled]="false">
        <ion-option value="1">1kg</ion-option>
        <ion-option value="250">250gm</ion-option>
        <ion-option value="500">500gm</ion-option>
        <ion-option value="100">100gm</ion-option>
      </ion-select>
    </ion-item>
    <button [disabled]=disable color="light" class="addbtn" ion-button clear (click)="addlist(product.name,product.id,product.price*product.quantity,product.quantity,product.images[0].src)">ADD</button>
 </ion-card>

这是我的

var disable=false;
addlist(name, id, price, qty, image) {
  //it is disabling each button present in the list 
  this.disable=true;
}

2 个答案:

答案 0 :(得分:0)

在您的组件中,根据您所需的loop制作products disable并添加condition属性:

for (let product of products) {
    product.disabled = false;
    if(product.somefield == 'somevalue'){
      product.disabled = true;
    }
}

在HTML 中将button disabled属性设为[disabled]="product.disabled"

<button [disabled]="product.disabled" color="light" class="addbtn" ion-button clear (click)="addlist(product.name,product.id,product.price*product.quantity,product.quantity,product.images[0].src)">ADD</button>

答案 1 :(得分:0)

如果您对阵列中的每件商品使用相同的disable属性,那么问题是什么呢?您需要为每件商品使用特定的disable你的阵列。

我看到两种方法:

  • 您可以遍历products并添加disable属性。如果它来自服务器并且您可以并且想要,那么您可以在那里添加该属性,这样您就不会浪费一点时间在前端执行此操作。
  • 您可以创建disable的新数组,并使用* ngFor索引访问每个项目的正确禁用。

第一个选项是:

在您的.ts文件中,您将拥有:

// Let's say you're fetching your products in a lifecyclehook like ionViewDidLoad
ionViewDidLoad = () => {
  // your call for the api...
  myHttpCall.then(prods => {
    this.products = prods;
    // let's use map to iterate through the products
    this.products.map(item => {
      // this'll create a property in every item of your array.
      item.disabled = false;
    })
  })
}

addlist(name, id, price, qty, image, product) {
  // you'll need to pass the entire object to your method, and then set the property to true.
  product.disabled = true;
}

我本可以直接在响应中使用map,或者使用扩展运算符,但我们的目标是最简单的。

在你的HTML中:

<!-- All your card code. Change the disabled of the button and the select as bellow -->
<button [disabled]="product.disabled" color="light" class="addbtn" ion-button clear (click)="addlist(product.name,product.id,product.price*product.quantity,product.quantity,product.images[0].src, product)">ADD</button>
<!-- Just pass the entire product in the end of the method -->

第二个选项:

在.ts中,您将创建一个新数组,并且对于产品中的每个项目,您都会推送一个新的布尔值:

export class YourPage {
  // the new boolean array
  public disabled: Array<boolean> = [];

  // The method where you get the products, same as the first option
  ionViewDidLoad = () => {
    // your call for the api...
    myHttpCall.then(prods => {
      this.products = prods;
      // use a for to iterate through
      for (let i =  0; i < this.products.length; i++){
        this.disabled.push(false);
      }
    })
  }

  addlist(name, id, price, qty, image, index) {
    // now you'll pass the index from the ngfor
    // you'll access the corresponding disable from the array and set to true
    this.disabled[index] = true;
  }
}

然后在你的html:

<!-- declare the index in your ngFor -->
<ion-card *ngFor="let product of products; let i = index" no-padding>
   <ion-item>
      <!-- change the disable to reflect the correct array position -->
      <ion-select [(ngModel)]="qty" *ngIf="product.type==variable" [disabled]="disabled[i]">
        <ion-option value="1">1kg</ion-option>
        <ion-option value="250">250gm</ion-option>
        <ion-option value="500">500gm</ion-option>
        <ion-option value="100">100gm</ion-option>
      </ion-select>
    </ion-item>
    <!-- Add the index in the end of your click method -->
    <button [disabled]="disabled[i]" color="light" class="addbtn" ion-button clear (click)="addlist(product.name,product.id,product.price*product.quantity,product.quantity,product.images[0].src, i)">ADD</button>
 </ion-card>

希望这会有所帮助:D