How to change file name in document folder in swift

Question

I have some files located at my document folder. I am saving the files like "data_20201223163209.pdf", "data_20201223171831.pdf", "data_20201222171831.pdf", "data_20201221171831.pdf" etc. Now I want to replace "data" with other strings like "newdata". So my files should be "newdata_20201223163209.pdf", "newdata_20201223171831.pdf", "newdata_20201222171831.pdf", "newdata_20201221171831.pdf"

My code:

do {
    let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
    let documentDirectory = URL(fileURLWithPath: path)
    let originPath = documentDirectory.appendingPathComponent("data")
    let destinationPath = documentDirectory.appendingPathComponent("newdata")
    try FileManager.default.moveItem(at: originPath, to: destinationPath)
} catch {
    print(error)
}

Please help me resolve this issue

"to resolve this issue" What is the issue? You aren't allowed to access files there without user's consent. How are you accessing them? — El Tomato
– El Tomato, Commented Dec 24, 2020 at 2:39

Leo Dabus · Accepted Answer · 2020-12-25 01:50:46Z

3

You just need to get the contents of your directory, filter the urls which names starts with "data_", iterate those urls and rename each one moving it to the same directory with the new name. Note that this assumes there is no file at the destination with the new names.

// Get the documents url
let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
    // Get its contents
    let contents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil)
    print(contents)
    // filter the contents that starts with "data_"
    let dataFiles = contents.filter { $0.lastPathComponent.hasPrefix("data_") }
    // iterate the source files
    for srcURL in dataFiles {
        // create the destinations appending "newdata_" + the source lastPathComponent dropping its "data_" prefix
        let dstURL = documentsUrl.appendingPathComponent("newdata_" + srcURL.lastPathComponent.dropFirst(5))
        // move/rename your files
        try FileManager.default.moveItem(at: srcURL, to: dstURL)
    }
} catch {
    print(error)
}

edited Dec 25, 2020 at 1:50

answered Dec 24, 2020 at 5:48

Leo Dabus

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4 Comments

Ios Developer Over a year ago

Hi @Leo thanks for your answer. when we are checking the lastPathComponent , the "pdf" is the last path compnet here. so it has prefix like :- "data_20201223163209.", "data_20201223171831.", "data_20201222171831." etc. so it is not entering to the for loop.

Leo Dabus Over a year ago

Pdf is the path extension

Leo Dabus Over a year ago

Are you using macOS or iOS? If you are using macOS you need to disable sandbox capability

Ios Developer Over a year ago

Thanks a lot @Leo Dabus. My code is working now

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