import Foundation
let fileManager = FileManager.default
//var filePath = "/Users/lujun/Desktop/lujun4/"
var filePath  = "/Users/lujun/Desktop/test12321314/test12321314"
var oldFileNamesArray = try fileManager.contentsOfDirectory(atPath: filePath)
for oldFileName in oldFileNamesArray {
    let oldFilePathName = filePath + "/" + oldFileName
    if oldFileName.hasSuffix(".swift") {
        let newFileName = oldFileName.replacingOccurrences(of: ".swift", with: "")
        debugPrint(newFileName)
        do{
            try  fileManager.moveItem(atPath: oldFilePathName, toPath: filePath  + "/" + newFileName)
        }
        catch{
            debugPrint(error.localizedDescription)
        }
    }
}