修正文件存在判断逻辑

MRFramework/MRFramework/FoundationManagers/Files/MRFiles.swift

@@ -45,14 +45,18 @@ extension MRFiles {
     ///   - path: 文件路径
     ///   - isDirectory: 是否文件夹，传入true，则路径一定要是文件夹才会返回true。默认是false
     /// - Returns: 文件是否存在，且是否跟传入的isDirectory相符
-    public class func fileExists(path: String, isDirectory: Bool = false) -> Bool {
+    public class func fileExists(path: String, isDirectory: Bool? = nil) -> Bool {
+        if let isDir = isDirectory {
             var isDic: ObjCBool = false
             let isDir = UnsafeMutablePointer<ObjCBool>(&isDic)
             let isExists = FileManager.default.fileExists(atPath: path, isDirectory: isDir)
             return isExists && (isDirectory == isDic.boolValue)
+        } else {
+            return FileManager.default.fileExists(atPath: path)
+        }
     }
     
-    public class func fileExists(url: URL, isDirectory: Bool = false) -> Bool {
+    public class func fileExists(url: URL, isDirectory: Bool? = nil) -> Bool {
         return fileExists(path: url.path, isDirectory: isDirectory)
     }
 }
@@ -409,7 +413,7 @@ extension MRFiles {
 
 // MARK: - 语法糖
 extension String {
-    public func isPathExists(_ isDirectory: Bool = false) -> Bool {
+    public func isPathExists(_ isDirectory: Bool? = nil) -> Bool {
         return MRFiles.fileExists(path: self, isDirectory: isDirectory)
     }
     
@@ -436,7 +440,7 @@ extension String {
 }
 
 extension URL {
-    public func isURLExists(_ isDirectory: Bool = false) -> Bool {
+    public func isURLExists(_ isDirectory: Bool? = nil) -> Bool {
         return MRFiles.fileExists(url: self, isDirectory: isDirectory)
     }
     

MRFramework/MRFramework/FoundationManagers/HotUpdate/MRUpdateManager.swift

@@ -154,7 +154,16 @@ extension MRUpdateManager {
         case .appUpgrade:
             if let bundleWWW = bundleWWWURL {
                 asyncIfNeeded {
-                    let error = self.sandboxUpdateURL.syncDelete() ?? self.sandboxBackupURL.syncDelete() ?? bundleWWW.syncCopy(to: self.sandboxSrcURL)
+                    var error: Error?
+                    if self.sandboxUpdateURL.isURLExists(true) {
+                        error = self.sandboxUpdateURL.syncDelete()
+                    }
+                    if error == nil && self.sandboxBackupURL.isURLExists(true) {
+                        error = self.sandboxBackupURL.syncDelete()
+                    }
+                    if error == nil {
+                        error = bundleWWW.syncCopy(to: self.sandboxSrcURL)
+                    }
                     self.asyncInMain {
                         complate?(self, error)
                     }