设置标识uid

Introduce/Record/INVideoExportController.swift

@@ -21,7 +21,7 @@ class INVideoExportController: BFBaseViewController {
     var hadUploadTask = false
     var avplayerTimeObserver: NSKeyValueObservation?
     
-    let recordUid = getRandomStringOfLength(length: 16)
+    var recordUid = getRandomStringOfLength(length: 16)
 
     let backV : UIView = {
         let v = UIView()