小编Ele*_*ena的帖子

这是我的代码：

let fileName = "someFileName"

func saveDataToFile(urlStr:String){
    let url = NSURL(string: urlStr)
    var data:NSData!
    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
    let directory = paths[0]
    let filePath = directory.stringByAppendingPathComponent(self.fileName)
    print(filePath)//prints /Users/.../Library/Developer/CoreSimulator/Devices/1013B940-6FAB-406B-96FD-1774C670A91E/data/Containers/Data/Application/2F7139D6-C137-48BF-96F6-7579821B17B7/Documents/fileName

    let fileManager = NSFileManager.defaultManager()

    data = NSData(contentsOfURL: url!)
    print(data) // prints a lot of data     
    if data != nil{
        fileManager.createFileAtPath(filePath, contents: data, attributes: nil)
    }

}

现在我想读取这些数据：

func readDataFromFile(){
    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
    let directory = paths[0]
    let filePath = directory.stringByAppendingPathComponent(self.fileName)
    print(filePath) // prints the same path
    let …