Ios log 4 (#569)

iOS logging refactoring

client/platforms/ios/LogController.swift

@@ -0,0 +1,26 @@
+import Foundation
+
+public func swiftUpdateLogData(_ qtString: std.string) -> std.string {
+  let qtLog = Log(String(describing: qtString))
+  var log = qtLog
+
+  if let neLog = Log(at: Log.neLogURL) {
+    neLog.records.forEach {
+      log.records.append($0)
+    }
+    
+    log.records.sort {
+      $0.date < $1.date
+    }
+  }
+    
+  return std.string(log.description)
+}
+
+public func swiftDeleteLog() {
+  Log.clear(at: Log.neLogURL)
+}
+
+public func toggleLogging(_ isEnabled: Bool) {
+  Log.isLoggingEnabled = isEnabled
+}