实际上，当您单击从LocalStorage获取"按钮时，您是从存储中获取字符串而不是数组.因此，您需要先解析它，然后才能在ngFor中使用它:

In fact, when you click on the "Get from LocalStorage" button, you get a string from the storage and not an array. So you need to parse it before trying to use it in ngFor:

getData(){
  this.LocalStorageData = JSON.parse(localStorage.getItem("DEMO data"));
}

请参阅以下示例: http://plnkr.co/edit/aumB4mMNVlV9TK5KDjoF?p=preview .