Xamarin Forms MessagingCenter 收不到消息

Question

我已经从这个 link 下载了 MultiImagePicker：https://github.com/danielkon96/MultiImagePickerand 它工作正常，没有任何问题。当我添加所有接口和类并且...在我的项目中时，MessagingCenter 没有收到消息。

上传页面中的按钮点击：

MessagingCenter.Unsubscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectedAndroid");
MessagingCenter.Subscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectedAndroid", (s, images) =>
{
   if (images.Count > 0)
   {
      ImgCarouselView.ItemsSource = images;
      InfoText.IsVisible = true;
   }
});

MainActivity 中的 OnActivityResult :

MessagingCenter.Send<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectedAndroid", images);

有什么问题吗？

Answer 1

感谢@pinedax 在中的回答我已经通过此更改解决了我的问题 :

MessagingCenter.Unsubscribe<Xamarin.Forms.Application, List<string>>(Xamarin.Forms.Application.Current, "ImagesSelectedAndroid");

MessagingCenter.Subscribe<Xamarin.Forms.Application, List<string>>(Xamarin.Forms.Application.Current, "ImagesSelectedAndroid", (s, images) =>

和

MessagingCenter.Send<Xamarin.Forms.Application, List<string>>(Xamarin.Forms.Application.Current, "ImagesSelectedAndroid", images);

Xamarin Forms MessagingCenter 收不到消息

Xamarin Forms MessagingCenter does not receive message

c#

xamarin.forms

messagingcenter