Ionic 4 - 从 Modal 传回数据 [英] Ionic 4 - Pass Data BACK from Modal

问题描述

我正在尝试创建一个模态窗口，将一组对象传递给它，让用户从该数组中选择一个对象，然后让我的模态窗口将他们选择的对象传回.

I'm trying to create a modal window, pass it an array of objects, have a user select one object from that array, and then have my modal pass back the object they've selected.

我尝试使用 modalName.onDidDismiss(data=> ...) 如此处所述，但显然 Ionic 4 更改了onDidDismiss"以不接受任何传回给它的值.

I've tried using the Ionic 2 approach of modalName.onDidDismiss(data=> …) as explained here, but apparently Ionic 4 changed "onDidDismiss" to not accept any values passed back to it.

所以我不知道如何将数据从我的模态窗口发送回调用它的页面.

So I'm at a loss for how to send data from my Modal window back to the page that called it.

推荐答案

几天前我遇到了同样的问题，这是我的解决方案:

Some days ago I had the same problem and here's my solution:

我想，您已经有一个包含实际模态的组件.名称 UserModalComponent

I guess, you already have a component which contains the actual modal. name UserModalComponent

您的 UserModalComponent 应该注入 ModalController:

Your UserModalComponent should get the ModalController injected:

constructor(private modalController: ModalController){}

下一步是将选定的用户传回:

Next step is to pass the selected user back:

selectUser(user: User):void {
  this.modalController.dismiss(user);
}

在您想要调用模态并让用户返回的组件中，您还必须注入 ModalController 如上所述，此外，您需要此方法:

In your component in which you want to call the modal and get the user back, you also have to inject the ModalController as above and additionally, you need this method:

 async openUserModal() {
    const modal = await this.modalCtrl.create({
      component: UserModalComponent,
      componentProps: { users: this.users },
    });

    modal.onDidDismiss()
      .then((data) => {
        const user = data['data']; // Here's your selected user!
    });

    return await modal.present();
  }

我希望这会有所帮助！如果有什么不清楚的，尽管问！

I hope this helps! If anything is unclear, just ask!

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