How can I retrieve local files with NSURL?

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独厮守ぢ
独厮守ぢ 2020-12-16 10:48

I\'m here with a question that probably has a really simple answer that I am overlooking... how can I retrieve local files with NSURL? I have this here:

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3条回答
  • 2020-12-16 11:07

    Your file doesn't exist in your main-bundle yet.

    You have to add the file your are using to your Bundle Resource.

    So to add it. Go to App Target -> Build Phases and check the Bundle Resource and add it by drag n' drop.

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  • 2020-12-16 11:22

    You are trying to load a file from your file system, not from web.

    For creating the NSURL you need to use fileURLWithPath: class method.

    Change your method like:

    Swift 2

    override func viewDidLoad()
    {
        super.viewDidLoad()
        var urlpath     = NSBundle.mainBundle().pathForResource("bpreg", ofType: "xml")
        let url:NSURL   = NSURL.fileURLWithPath(urlpath!)!
        parser          = NSXMLParser(contentsOfURL: url)!
        parser.delegate = self
        parser.parse()
    }
    

    Swift 3

    override func viewDidLoad()
    {
        super.viewDidLoad()
        let urlpath     = Bundle.main.path(forResource: "bpreg", ofType: "xml")
        let url         = NSURL.fileURL(withPath: urlpath!)
        parser          = XMLParser(contentsOf: url)!
        parser.delegate = self
        parser.parse()
    }
    

    Note: In Swift 3 you can also use the URL class to construct the url instead of NSURL class. So the above code for constructing url changes to:

    let url = URL(fileURLWithPath: urlpath!)
    
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  • 2020-12-16 11:25

    You should use URLForResource(_:withExtension:) instead of pathForResource:

    let fileUrl = Bundle.main.url(forResource: "bpreg", withExtension: "xml")
    
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