Merge branch 'develop_PDFReaderProNew' of git.kdan.cc:Mac_PDF/PDF_Office into develop_PDFReaderProNew

PDF Office/PDF Master/Class/PDFTools/KMBookmark/Manager/KMBookmarkManager.swift

@@ -23,13 +23,14 @@ class KMBookmarkManager {
     }
     
     func reloadData() {
-        let bookmarkDictionary: NSDictionary = UserDefaults.standard.persistentDomain(forName: bookmarksIdentifier)! as NSDictionary
-        let documents: NSArray = bookmarkDictionary.object(forKey: kRecentDocuments) as! NSArray
+        let bookmarkDictionary: NSDictionary = (UserDefaults.standard.persistentDomain(forName: bookmarksIdentifier) ?? NSDictionary() as! [String : Any]) as NSDictionary
+        let documents: NSArray = (bookmarkDictionary.object(forKey: kRecentDocuments) ?? NSArray()) as! NSArray
         for info in documents {
             recentDocuments.append(info as! [String : Any])
         }
         
-        rootBookmark = KMRootBookmark.bookmarkRoot(childrenProperties: bookmarkDictionary[kBookmarks] as! NSArray)
+        let childrenProperties = (bookmarkDictionary[kBookmarks] ?? NSArray()) as! NSArray
+        rootBookmark = KMRootBookmark.bookmarkRoot(childrenProperties: childrenProperties)
     }
     
     func saveData() {