feat: 初始化 iOS 远程控制端项目

webrtc_controller_ios/web_rtc_controller_ios/Signaling/SignalMessage.swift

@@ -0,0 +1,43 @@
+import Foundation
+
+/// 信令消息（JSON），与 WebRTCSignalServer 的 SignalMessage 字段一一对应。
+/// type: REGISTER / OFFER / ANSWER / ICE_CANDIDATE / TARGET_OFFLINE /
+///       CONNECTION_REJECTED / REQUEST_ERROR / REQUEST_TIMEOUT / REGISTER_SUCCESS 等
+struct SignalMessage: Codable {
+    var type: String?
+    var fromDeviceId: String?
+    var toDeviceId: String?
+    var deviceType: String?
+    /// payload 为字符串形式的 JSON（如 {"sdp": "..."}），与服务端约定一致
+    var payload: String?
+    var authType: String?
+    var authValue: String?
+
+    init(type: String? = nil,
+         fromDeviceId: String? = nil,
+         toDeviceId: String? = nil,
+         deviceType: String? = nil,
+         payload: String? = nil,
+         authType: String? = nil,
+         authValue: String? = nil) {
+        self.type = type
+        self.fromDeviceId = fromDeviceId
+        self.toDeviceId = toDeviceId
+        self.deviceType = deviceType
+        self.payload = payload
+        self.authType = authType
+        self.authValue = authValue
+    }
+
+    /// 解析 payload 字符串为 JSON 字典
+    func payloadJSON() -> [String: Any]? {
+        guard let payload, let data = payload.data(using: .utf8) else { return nil }
+        return (try? JSONSerialization.jsonObject(with: data)) as? [String: Any]
+    }
+
+    /// 将字典序列化为 payload 字符串
+    static func encodePayload(_ dict: [String: Any]) -> String? {
+        guard let data = try? JSONSerialization.data(withJSONObject: dict) else { return nil }
+        return String(data: data, encoding: .utf8)
+    }
+}