ionic 2 如何使用索引动态加载

对于 ionic 1 我已经这样做了ng-if="$index % 3 === 0"但我需要在网格视图中动态加载数据，其中一行有两个列。我怎样才能做到这一点。我尝试了下面的代码：

in my schudle.ts：

ResourceData = [{ name: "ksjs" },{ name: "daa" },{ name: "das" }, {name: "das" }, {name: "Computer Science" }, { name: "Moc" }]

My html :

 <div class="item item-body no-padding" style="border-width: 0px !important; overflow-y:hidden;height: 65%;">

                <div class="row no-padding" style="height: 65%;" *ngFor="let data of ResourceData" *ngIf="index % 2 == 0">
                    <div class="col col-50 custom-design2" style="background: url(url) no-repeat center;background-size: cover;">
                        <div class="custom-design1"><span class="grid-title">{{data[index].name}}</span></div>
                    </div>
                    <div class="col col-50 custom-design2" style="background: url(url) no-repeat center;background-size: cover;">
                        <div class="custom-design1"><span class="grid-title">{{data[index + 1].name}}</span></div>
                    </div>
                </div>
</div

但它不起作用。可能是这样ngif可能是错误的。请告诉我如何解决这个问题。

我需要这样的：

as      fa

fas     faaf

faf      faf

fafa     fafaf

所以每行两列。请告诉我我做错了什么！！

Thanks

ionic 1

 <div class="row no-padding" ng-repeat="mydash in Data"  ng-if="$index % 3 === 0">
                <div class="col col-30 custom-design2" style="background: url({{Data[$index].Image}}) no-repeat center;background-size: cover;" ng-click="changestate(Data[$index])" ng-if="$index < Data.length">
                    <div class="custom-design1"><span class="grid-title">{{Data[$index].name}}</span></div>
                </div>
                <div class="col col-30 custom-design2" style="background: url({{Data[$index + 1].Image}}) no-repeat center;background-size: cover; " ng-click="changestate(Data[$index + 1])" ng-if="$index + 1 < Data.length">
                    <div class="custom-design1"><span class="grid-title">{{Data[$index + 1].name}}</span></div>
                </div>

                <div class="col col-30 custom-design2" style="background: url({{Data[$index + 2].Image}}) no-repeat center;background-size: cover; " ng-click="changestate(Data[$index + 2])" ng-if="$index + 2 < Data.length">
                    <div class="custom-design1"><span class="grid-title">{{Data[$index + 2].name}}</span></div>
                </div>
            </div> 

您正在使用两个结构指令在同一个标​​签中。两者*ngFor and *ngIf in one div.

对于此用例，有一个简单的解决方案：将 *ngIf 放在包装 *ngFor 元素的容器元素上。一个或两个元素可以是 ng-container，因此您不必引入额外的 HTML 级别。

Use ng-容器

您还可以通过附加来获取索引let i =index in *ngFor.

<div class="row no-padding" style="height: 65%;" *ngFor="let data of ResourceData;let i = index">
     <ng-container *ngIf=" i % 2 == 0">
          <div class="col col-50 custom-design2" style="background: url(url) no-repeat center;background-size: cover;">
               <div class="custom-design1"><span class="grid-title">{{ResourceData[i].name}}</span></div>
            </div>
            <div class="col col-50 custom-design2" style="background: url(url) no-repeat center;background-size: cover;">
                 <div class="custom-design1"><span class="grid-title">{{ResourceData[i+1].name}}</span></div>
             </div>
     </ng-container>
</div>