获取文件列表

public func getAllFile() -> [String] {
    var filePaths = [String]()
    do {
        var array = try FileManager.default.contentsOfDirectory(atPath: getFilePath())
        sortFileArray(sort: &array)
        for fileName in array {
            var isDir: ObjCBool = true
            let fullPath = getFilePath() + fileName
            if FileManager.default.fileExists(atPath: fullPath, isDirectory: &isDir) {
                if !isDir.boolValue, fileName.hasSuffix("plist") {
                    let fileInfo = try FileManager.default.attributesOfItem(atPath: fullPath)
                    print("fileInfo[creationDate]   \(fileInfo[.creationDate])")
                    filePaths.append(fileName)
                }
            }
        }
    } catch let error as NSError {
        print("error \(error)")
    }
    return filePaths
}
private func getFilePath() -> String {
    NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first! + "/"
}

按照创建日期进行排序

fileprivate func sortFileArray(sort array:inout [String]){
    for i in 0 ..< array.count {
        for j in i + 1 ..< array.count {
            let fullPath = getFilePath() + array[i]
            let nextPath = getFilePath() + array[j]
            do {
                if let fileDate = try FileManager.default.attributesOfItem(atPath: fullPath)[.creationDate] as? Date
                ,let nextDate = try FileManager.default.attributesOfItem(atPath: nextPath)[.creationDate] as? Date,
                   fileDate.compare(nextDate) == .orderedAscending{
                    exchangeValue(&array, i, j)
                }
            } catch let error as NSError {
                print("error  \(error)")
            }
        }
    }
}
fileprivate func exchangeValue<T>(_ nums:inout [T],_ a:Int,_ b:Int){
    (nums[a],nums[b]) = (nums[b],nums[a])
}