callback - 带有参数的 Ionic2 navController pop(回调)

Question

我想在两个页面之间进行回调。
在第 1 页中，我有以下代码:

  DataInfo= [
    {
       Price: 0,
       ClosePrice: 0,
       UpdateTime:"",
       DefaultPrice:0
    }

  ] 

GetClosePrice(i):number{
return DataInfo[i].ClosePrice;
}

我想从第 2 页获取 'i' 的值，当导航 Controller 返回第 1 页时如何加载函数 GetClosePrice() (this.navCtrl.pop())

Answer 1

SOURCE PAGE CLASS

this.navCtrl.push(Page,
{
    data: this.data,
    callback: this.getData
});

getData = data =>
{
  return new Promise((resolve, reject) => {
    for (let order of orders) {
      this.data = data;
    }
    resolve();
  });
};

TARGET PAGE CLASS

constructor(public navCtrl: NavController, public navParams: NavParams)
{
  this.callback = this.navParams.get('callback');
  this.data = this.navParams.get('data') || [];
}

sendData(event: any): void
{
  this.callback(this.data).then( () => { this.navCtrl.pop() });
}

TARGET PAGE TEMPLATE

<button ion-button (click)="sendData($event)">