代码调整

NFCLockDemoV2/MainPage.xaml.cs

@@ -66,7 +66,11 @@ public partial class MainPage : ContentPage
         InitializeComponent();
         _mainMainViewModel = mainViewModel;
         BindingContext = _mainMainViewModel;
+    }
 
+    protected override void OnAppearing()
+    {
+        base.OnAppearing();
 #if IOS
         SetNFCCallbacks();
 #endif

NFCLockDemoV2/Platforms/iOS/Info.plist

@@ -30,5 +30,11 @@
 	<string>Assets.xcassets/appicon.appiconset</string>
 	<key>NFCReaderUsageDescription</key>
 	<string>此应用需要使用NFC功能来与智能锁设备通信</string>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>fetch</string>
+		<!-- 如果需要 NFC 后台操作，添加： -->
+		<string>nfc-tag-reading</string>
+	</array>
 </dict>
 </plist>