loading file url from documentDirectory to table view

Question

I've been trying to load the file in document directory to show on the uitableview and read them using quickview

var fileURLs: [NSURL] = []

every time I run the apps it error on this line as "index out of range" on fileURLs[indexPath.row]

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if QLPreviewController.canPreview(fileURLs[indexPath.row]) {
        quickLookController.currentPreviewItemIndex = indexPath.row
        navigationController?.pushViewController(quickLookController, animated: true)
    }
}

the fileURLs array is being appended by the method below

private func prepareFileURLS() {
    let fileManager = FileManager.default
    let path = fileManager.urls(for: .documentDirectory, in: .userDomainMask).last! as NSURL
    let fileName = String(describing: path.lastPathComponent)
    let pathString = String(describing: path.absoluteURL)
    fileNames.append(fileName)

    if FileManager.default.fileExists(atPath: pathString) {
        fileURLs.append(path as NSURL)
        print(fileURLs)
    }
}

and the result every time is an empty array when I check it, and return only a document path not the file path itself

[]
Optional(file:///Users/N/Library/Developer/CoreSimulator/Devices/EC72CD97-87F4-478E-967C-6BA135B2EC6C/data/Containers/Data/Application/0778931B-77DD-4CE8-92BF-E9A8002F901D/Documents/)

when I manually checked the folder their is a file in there. Anyone knows what is wrong with the code above ?

added ** the file on the table show perfectly fine since it load name and other data from a model file except it can't be view

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    //tableView.reloadData()
    return csvFiles.count
}

here is data model

class CSVData {

// MARK: Properties
var name: String
var descriptions: String
var photo: UIImage?
var url: NSURL


// MARK: Init
init?(name: String, descriptions: String?, photo: UIImage?, url: NSURL){
    // init should fail if there is no name
    if name.isEmpty {
        return nil
    }

    self.name = name
    self.descriptions = descriptions ?? ""
    self.photo = photo
    self.url = url
}

}

You need to show your `numberOfRowsInSecrion` function since it seems that you have told the tableview that there are more rows than there are elements in your array. — Paulw11, Nov 05 '17 at 20:05
@Paulw11 I just added more information. the file shows perfectly on the table except it can't be view. what I guess is due to it can't access the url of it. The data model also include its url but I don't know exactly how to use it though — JameS, Nov 05 '17 at 20:15
`absoluteURL` doesn't return a path. To get the url path you should get its `path` property. `fileExists(atPath:)` will always fail if you pass the url absoluteString. `FileManager.default.fileExists(atPath: url.path)` . And don't use `String(describing:)` — Leo Dabus, Nov 05 '17 at 21:56

score 1 · Accepted Answer · answered Nov 05 '17 at 21:33

1

fileManager.urls returns array of directories on domain, not array of files in that directory. To get file paths you should use contentsOfDirectory of FileManager. See https://stackoverflow.com/a/27722526/6835150

answered Nov 05 '17 at 21:33

Максуд Даудов

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loading file url from documentDirectory to table view

1 Answers1