从文档目录中的目录中删除文件？ [英] Delete files from directory inside Document directory?

问题描述

我创建了一个Temp目录来存储一些文件：

I have created a Temp directory to store some files:

//MARK: -create save delete from directory
func createTempDirectoryToStoreFile(){
    var error: NSError?
    let paths = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)
    let documentsDirectory: AnyObject = paths[0]
    tempPath = documentsDirectory.stringByAppendingPathComponent("Temp")

    if (!NSFileManager.defaultManager().fileExistsAtPath(tempPath!)) {

        NSFileManager.defaultManager() .createDirectoryAtPath(tempPath!, withIntermediateDirectories: false, attributes: nil, error: &error)
   }
}

没关系，现在我要删除目录中的所有文件......我尝试如下：

It's fine, now I want to delete all the files that are inside the directory... I tried as below:

func clearAllFilesFromTempDirectory(){

    var error: NSErrorPointer = nil
    let dirPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
    var tempDirPath = dirPath.stringByAppendingPathComponent("Temp")
    var directoryContents: NSArray = fileManager.contentsOfDirectoryAtPath(tempDirPath, error: error)!

    if error == nil {
        for path in directoryContents {
            let fullPath = dirPath.stringByAppendingPathComponent(path as! String)
            let removeSuccess = fileManager.removeItemAtPath(fullPath, error: nil)
        }
    }else{

        println("seomthing went worng \(error)")
    }
}

我注意到文件仍在那里......我做错了什么？

I notice that files are still there... What am I doing wrong?

推荐答案

两件事，使用 temp 目录，然后将错误传递给 fileManager.removeItemAtPath 并将其放在if中以查看失败的内容。此外，您不应该检查错误是否已设置，而是方法是否返回数据。

Two things, use the temp directory and second pass an error to the fileManager.removeItemAtPath and place it in a if to see what failed. Also you should not be checking if the error is set but rather whether a methods has return data.

func clearAllFilesFromTempDirectory(){

    var error: NSErrorPointer = nil
    let dirPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
    var tempDirPath = dirPath.stringByAppendingPathComponent("Temp")
    var directoryContents: NSArray = fileManager.contentsOfDirectoryAtPath(tempDirPath, error: error)?

    if directoryContents != nil {
        for path in directoryContents {
            let fullPath = dirPath.stringByAppendingPathComponent(path as! String)
            if fileManager.removeItemAtPath(fullPath, error: error) == false {
                println("Could not delete file: \(error)")
            }
        }
    } else {
        println("Could not retrieve directory: \(error)")
    }
}

要获取正确的临时目录，请使用 NSTemporaryDirectory（）

To get the correct temporary directory use NSTemporaryDirectory()

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