501-iOS: minor changes, adding struct MethodChannel

ios/Classes/Helper/MethodChannel.swift

@@ -0,0 +1,53 @@
+/*
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+ * Please make sure that third-party modules and libraries are used
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+ * Any modifications to this package must retain all copyright notices
+ * of the original copyright holder(s) for the original code used.
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+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the Mozilla Public License 2.0
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+ */
+
+import Foundation
+
+struct MethodChannel {}
+
+extension MethodChannel {
+
+    struct DeltaChat {
+        static let Core = "deltaChatCore"
+    }
+
+}

ios/Classes/SwiftDeltaChatCorePlugin.swift

@@ -85,7 +85,7 @@ public class SwiftDeltaChatCorePlugin: NSObject, FlutterPlugin {
 
     // This is our entry point
     public static func register(with registrar: FlutterPluginRegistrar) {
-        let channel = FlutterMethodChannel(name: "deltaChatCore", binaryMessenger: registrar.messenger())
+        let channel = FlutterMethodChannel(name: MethodChannel.DeltaChat.Core, binaryMessenger: registrar.messenger())
         let delegate = SwiftDeltaChatCorePlugin(registrar: registrar)
         registrar.addMethodCallDelegate(delegate, channel: channel)
     }