读取文件中的文件，否则返回零

发布于 2025-01-21 04:43:10 字数 851 浏览 1 评论 0原文

我正在阅读用户在iOS Swift中选择的 plist 文件。该代码在XCode模拟器上按预期工作（iPhone 13）。但是在真实的iPhone 13上，readArrayFromplist函数返回nil。我找不到原因。

我已经从iPhone和iCloud中选择了文件选择器。
我已经读到iOS在docucepicker函数中提供了权限。
我已经打印了URL，看起来还不错（+在模拟器上起作用）。

这是代码（imagePosArray在Real iPhone上为零）：

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    guard let myURL = urls.first else {
        return
    }
    print("import result : \(myURL)")
    imagePosArray = readArrayFromPlist(filepath: myURL.path)
}

func readArrayFromPlist(filepath: String) -> [Int]? {
    if let arrayFromFile: [Int] = NSArray(contentsOfFile: filepath) as? [Int] {
        return arrayFromFile
    }
    return nil
}

原文

I am reading a plist file selected by the user in iOS swift. The code works as expected on XCode simulators (iPhone 13). But on a real iPhone 13, the readArrayFromPlist function returns nil. I couldn’t find the reason.

I've selected the file using document picker both from my iPhone and iCloud.
I've read that iOS provides permission inside documentPicker function.
I've printed the URL and it looks OK (+ it works on simulators).

Here is the code (imagePosArray is nil on real iPhone):

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    guard let myURL = urls.first else {
        return
    }
    print("import result : \(myURL)")
    imagePosArray = readArrayFromPlist(filepath: myURL.path)
}

func readArrayFromPlist(filepath: String) -> [Int]? {
    if let arrayFromFile: [Int] = NSArray(contentsOfFile: filepath) as? [Int] {
        return arrayFromFile
    }
    return nil
}

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

忆悲凉 2025-01-28 04:43:10

我找到了这个问题并解决了问题。我应该使用didpickdocumentat而不是didpickdocumentsat，然后请求访问。这是新代码：

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
    // Start accessing a security-scoped resource.
    guard url.startAccessingSecurityScopedResource() else {
        // Handle the failure here.
        return
    }

    print(url.path)
    imagePosArray = readArrayFromPlist(filepath: url.path)

    // Make sure you release the security-scoped resource when you finish.
    defer { url.stopAccessingSecurityScopedResource() }
}

I found the issue and solved it. I should have used didPickDocumentAt instead of didPickDocumentsAt and then request access. Here is the new code:

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
    // Start accessing a security-scoped resource.
    guard url.startAccessingSecurityScopedResource() else {
        // Handle the failure here.
        return
    }

    print(url.path)
    imagePosArray = readArrayFromPlist(filepath: url.path)

    // Make sure you release the security-scoped resource when you finish.
    defer { url.stopAccessingSecurityScopedResource() }
}

回复收藏 0 原文

~没有更多了~