fix

BFRecordScreenKit/Classes/RecordScreen/Controller/BFRecordScreenController.swift

@@ -1471,7 +1471,7 @@ public class BFRecordScreenController: BFBaseViewController {
     // 通过缩略图进度条控制播放进度
     func changeProgress(progress: Float) {
         var newProgress = progress
-        if newProgress.isNaN || newProgress.isFinite {
+        if progress.isNaN || progress.isInfinite {
             newProgress = 0
         }
         if itemModels[currItemModelIndex].mediaType == .VIDEO {