add some method

ios/Classes/Util/Any+Extension.swift

@@ -0,0 +1,23 @@
+//
+//  Any+Extension.swift
+//  flutter_openim_sdk
+//
+//  Created by willem on 2021/10/9.
+//
+
+import Foundation
+
+public func typeName(_ obj: Any) -> String {
+    if obj is AnyClass {
+        return "\(obj)"
+    }
+    return "\(type(of: obj))"
+}
+
+public func safeMainAsync(_ work: @escaping @convention(block) () -> Void) {
+    if Thread.isMainThread {
+        work()
+    } else {
+        DispatchQueue.main.async(execute: work)
+    }
+}

ios/Classes/Util/FlutterMethodCall+Extension.swift

@@ -0,0 +1,109 @@
+//
+//  FlutterMethodCall+Extension.swift
+//  flutter_openim_sdk
+//
+//  Created by willem on 2021/10/9.
+//
+
+import Foundation
+import Flutter
+
+public protocol Stringable {
+    var rawValue: String { get }
+}
+
+extension String: Stringable {
+    public var rawValue: String { self }
+}
+
+public extension FlutterMethodCall {
+    subscript(_ key: Stringable) -> Any? {
+        guard let params = self.arguments as? [String: Any] else {
+            return nil
+        }
+        return params[key.rawValue]
+    }
+    
+    subscript(string key: Stringable) -> String {
+        return self[key] as? String ?? ""
+    }
+    
+    subscript(jsonString key: Stringable) -> String {
+        guard let params = self.arguments as? [String: Any] else {
+            return ""
+        }
+        let arg = params[key.rawValue] as AnyObject
+        return JsonUtil.toString(object: arg)
+    }
+    
+    subscript(int32 key: Stringable) -> Int32 {
+        guard let value = self[key] else {
+            return 0
+        }
+        if let value = value as? Int32 {
+            return value
+        } else if let value = value as? String {
+            return Int32(value) ?? 0
+        }
+        return 0
+    }
+    
+    subscript(int64 key: Stringable) -> Int64 {
+        guard let value = self[key] else {
+            return 0
+        }
+        if let value = value as? Int64 {
+            return value
+        } else if let value = value as? String {
+            return Int64(value) ?? 0
+        }
+        return 0
+    }
+    
+    subscript(int key: Stringable) -> Int {
+        guard let value = self[key] else {
+            return 0
+        }
+        if let value = value as? Int {
+            return value
+        } else if let value = value as? String {
+            return Int(value) ?? 0
+        }
+        return 0
+    }
+    
+    subscript(double key: Stringable) -> Double {
+        guard let value = self[key] else {
+            return 0
+        }
+        if let value = value as? Double {
+            return value
+        } else if let value = value as? String {
+            return Double(value) ?? 0.0
+        }
+        return 0
+    }
+    
+    subscript(bool key: Stringable, default default: Bool = false) -> Bool {
+        guard let value = self[key] else {
+            return `default`
+        }
+        if let value = value as? Bool {
+            return value
+        } else if let value = value as? Int {
+            return value != 0
+        } else if let value = value as? NSString {
+            return value.boolValue
+        }
+        return `default`
+    }
+    
+    subscript(dict key: Stringable) -> [AnyHashable: Any] {
+        return self[key] as? [AnyHashable: Any] ?? [:]
+    }
+    
+    func toJsonString() -> String {
+        let params = self.arguments as AnyObject
+        return JsonUtil.toString(object: params)
+    }
+}