nsfilemanager

问题 I am trying to create a new directory and put files into it. However, I'm getting Error Domain=NSCocoaErrorDomain Code=257 "The file “Offline” couldn’t be opened because you don’t have permission to view it." I am able to create this new directory and the file exists. let offlinePath = fileDirectory.appendingPathComponent("Offline") try? fileManager.createDirectory(at: offlinePath, withIntermediateDirectories: true, attributes: nil) files.forEach { file in if let localUrl = file.localUrl { do

问题 I'm trying to create a directory inside the Application Support Directory, but it fails every single time. Here's the code: func getDownloadableContentPath() -> String { let paths = NSSearchPathForDirectoriesInDomains(.applicationSupportDirectory, .userDomainMask, true) var directory = paths[0] directory = URL(fileURLWithPath: directory).appendingPathComponent("IAP").absoluteString let fileManager = FileManager.default if !fileManager.fileExists(atPath: directory) { do { try fileManager

问题 I have successfully Implemented downloading mechanism for pdf files. Files are downloading and save to document directory of simulator. Issue is when I try to disconnect internet the files locally stored not accessible. In my application I have two modes Online and Offline. In Online mode I store data and its accessible at Offline mode. Only problem is getting with pdf files. How to access pdf files in offline mode? viewController Code: let fileType = (URL != nil) ? ".pdf" : ".png"

问题 I'm looking at the NSFileManager class reference and I'm a bit confused by what NSFileProtectionComplete means. This is what the class reference says: The file is stored in an encrypted format on disk and cannot be read from or written to while the device is locked or booting. Does this mean that the file is stored in encrypted format on disk always ... regardless of whether the device has a passcode (or similar security mechanism) set? 回答1: complete protection (NSFileProtectionComplete): The

问题 After switching my application to iOS9 I started to get errors that the files I was writing were not readable. Here is how I create the files let fileManager = NSFileManager.defaultManager() let directory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] let path = "\(directory)/file.txt" let attributes: [String:AnyObject] = [NSFilePosixPermissions: NSNumber(short: 666)] let success = fileManager.createFileAtPath(path, contents: nil, attributes: attributes)

问题 This is a follow-up from this question. Thanks so much to @rmaddy and @LeoDabus for your help thus far! The Good : my addImage button gets me the correct image in collectionView the first time I pick an image. The Bad : the second time I select an image, it changes both cells to the 2nd image. By the third/fourth/etc times I try to addImage, the image is always the same across each cell no matter what image I choose (i.e. 1st try: image1, 2nd try: image 2, image 2, 3rd try: image 2, image 2,

问题 I get a negaitve number from trying to use this function can anyone help. see code below NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:dbPath error:Error]; NSDictionary *fileSysAttributes = [fileManager fileSystemAttributesAtPath:dbPath]; NSNumber *FileSize = [fileAttributes objectForKey:NSFileSize]; NSNumber *FreeSpace = [fileSysAttributes objectForKey:NSFileSystemFreeSize]; NSLog(@"FileSystem = %@",fileSysAttributes); // gives good values NSLog(@"File Size = %d",

问题 I want to store pictures taken from camera and video recordings from my application in a separate folder in temporary directories for a while. And as the task is being completed, they shall be going to save into the database. How do I save pictures taken from camera & video recording files in a separate folder in temp directories? 回答1: You are looking for this to get tot he caches folder to store temporary files: NSString* path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,

问题 I am writing a utility that walks a directory tree on Cocoa and tries to detect changes that have occurred since the directory was last synchronized with a back-up location. When I initially synchronize the files and folders I obtain the NSFileSystemFileNumber and store it in the database record for that file or folder: NSString *oldFilePath = /* ... */; NSError *error = nil; NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:oldFilePath error:&error]; /* set

问题 I've been trying to save and load UIImages in my app's Documents folder or preferably temp folder (so every time my app gets closed images will be deleted) but they aren't working correctly. I've tried three approaches but only the third approach works and i'm wondering what's the right way to do it? I highly appreciate any help. //First Approach, to save and load later, Doesn't work. //Saving the image NSURL *documentsDirectoryURL = [[[NSFileManager defaultManager] URLsForDirectory