iOS 沙盒文件重命名

func setupFileRename(_ filePath: String) -> String {
    
    let url = URL(fileURLWithPath: filePath)
    let newPath = filePath.replacingOccurrences(of: url.lastPathComponent, with: "")
    let moveToPath = newPath + currentTime() + "." + url.pathExtension
    
    do {
        try FileManager.default.moveItem(at: url, to: URL(fileURLWithPath: moveToPath))
        return moveToPath
    } catch {
        return ""
    }
}

func currentTime() -> String {
    let formatter = DateFormatter()
    formatter.dateFormat = "yyyyMMddHHmmss"
    return formatter.string(from: Date())
}