TypeError:self.parent.parent.context.parseInt不是函数

Question

我正在尝试使用ngStyle为img指定高度,为此我用一些数学运算来计算高度,如下所示:

<div [ngSwitch]="tbNm?tbNm:'itm0'">
    <ion-list *ngFor="let vl of scrnshot;let ind=index">
      <img *ngSwitchCase="'itm'+ind" alt="Akhilesh" [ngStyle]="{'height':(parseInt(vl.names[0].hitWid.bdHt+(websitTyp(vl._id.origin)?100:0)))+'px','width':(vl.names[0].hitWid.bdWd+'px')}" [src]="vl.names[0].base64">
    </ion-list>
  </div>

但是当我运行它时会出现以下错误:

error_handler.js:51 TypeError: self.parent.parent.context.parseInt is not a function
    at DebugAppView._View_HomePage9.detectChangesInternal (HomePage.ngfactory.js:1444)
    at DebugAppView.AppView.detectChanges (view.js:272)
    at DebugAppView.detectChanges (view.js:377)
    at DebugAppView.AppView.detectContentChildrenChanges (view.js:290)
    at DebugAppView._View_HomePage8.detectChangesInternal (HomePage.ngfactory.js:1407)
    at DebugAppView.AppView.detectChanges (view.js:272)
    at DebugAppView.detectChanges (view.js:377)
    at DebugAppView.AppView.detectContentChildrenChanges (view.js:290)
    at DebugAppView._View_HomePage0.detectChangesInternal (HomePage.ngfactory.js:270)
    at DebugAppView.AppView.detectChanges (view.js:272)

Answer 1

每个文件:

也许更令人惊讶的是,模板表达式无法引用全局命名空间中的任何内容.他们不能参考窗口或文档.他们无法调用console.log或Math.max.它们仅限于引用表达式上下文的成员.

https://angular.io/docs/ts/latest/guide/template-syntax.html

你可以解决它:

class Component {
  myParseInt = parseInt;
}

HTML

[ngStyle]="{'height':(myParseInt (...