Question

在我的iOS应用程序中，我希望用户能够导出和导入设置文件。我正试图在此刻实施导入功能。

我发送了一封包含设置文件的电子邮件（在Ubuntu中创建，带有UTF8扩展名，如果这很重要的话）

我在pList中定义了我的文件扩展名（.inv），如下所示：

<key>CFBundleDocumentTypes</key>
<array>
    <dict>
        <key>CFBundleTypeIconFiles</key>
        <array/>
        <key>CFBundleTypeName</key>
        <string>Stratix Settings File</string>
        <key>CFBundleTypeRole</key>
        <string>Editor</string>
        <key>LSHandlerRank</key>
        <string>Owner</string>
        <key>LSItemContentTypes</key>
        <array>
            <string>com.invera.settings</string>
        </array>
    </dict>
</array>
<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.data</string>
        </array>
        <key>UTTypeDescription</key>
        <string>Stratix Settings File</string>
        <key>UTTypeIdentifier</key>
        <string>com.invera.settings</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <string>inv</string>
        </dict>
    </dict>
</array>

我在AppDelegate中覆盖了方法：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    if launchOptions != nil {
        let options = launchOptions! as NSDictionary

        let file = options.objectForKey(UIApplicationLaunchOptionsURLKey) as! NSURL?

        if file != nil {
            let path = "" + (file?.filePathURL?.description)!

            ((self.window?.rootViewController as! UINavigationController).visibleViewController as! LoginViewController).readSettingsFile(path)
        }
    }

    return true
}

func application(application: UIApplication, handleOpenURL url: NSURL) -> Bool {
    let path = "" + (url.filePathURL?.description)!

    ((self.window?.rootViewController as! UINavigationController).visibleViewController as! LoginViewController).readSettingsFile(path)

    return true
}

func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
    let path = "" + (url.filePathURL?.description)!

    ((self.window?.rootViewController as! UINavigationController).visibleViewController as! LoginViewController).readSettingsFile(path)

    return true
}

并创建了一个方法来读取ViewController中的文件：

    func readSettingsFile(filePath : String) {
    NSLog("File path : " + filePath)
    do{
        let content = try String(contentsOfFile: filePath, encoding: NSUTF8StringEncoding)
        NSLog(content)
    } catch let error as NSError {
        print(error)
    }
}

但是当我尝试读取文件时，它说该文件不存在：

File path : file:///private/var/mobile/Containers/Data/Application/E7076F5B-9131-4253-BAE7-0053CC872C2B/Documents/Inbox/settings-32.inv

Error Domain=NSCocoaErrorDomain Code=260 "The file “settings-32.inv” couldn’t
 be opened because there is no such file." UserInfo={
 NSFilePath=file:///private/var/mobile/Containers/Data/Application/E7076F5B-9131-4253-BAE7-0053CC872C2B/Documents/Inbox/settings-32.inv, 
 NSUnderlyingError=0x14ed7760 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

Answer 1

获取文件路径的代码不正确。替换这样的行：

let path = "" + (file?.filePathURL?.description)!

使用：

let path = file?.path

仅供参考 - 永远不要将description方法用于调试和记录以外的任何其他方法。

免责声明 - 我不能流利使用Swift，因此您可能需要在!或?处调整我的答案。

iOS在应用中打开附件。没有相应的文件和目录

1 个答案: