nsdocumentdirectory

问题 Currently i am working in iPhone application, i have an pdf file in resource folder (Local pdf file) then i read that pdf file (paper.pdf) successfully, below i have mentioned read local pdf file for your reference. Example: CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("paper.pdf"), NULL, NULL); pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL); CFRelease(pdfURL); Then i have tried to store pdf file (from URL) in NSDocument directory, stored successfully. NSData

问题 I have seen this code in other post, for save pictures: // Create path. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Image.png"]; // Save image. [UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES]; An d I'm trying convert to swift for save a picture take with avfoundatioin but I dont know type NSDocumentDirectory and NSUserDomainMask here How

问题 I am trying to save data in the documents folder on iPhone 5.1 simulator. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory, @"myData.json"]; if ([[NSFileManager defaultManager] isWritableFileAtPath:filePath]) { NSLog(@"Writable"); }else { NSLog(@"Not Writable"); } I've got always "Not Writable". Any idea? Please

问题 I have an app in the app store that uses Core Data to persist much of the data. The exception is storing images. I store images in subdirectories to the Documents directory and store an NSURL reference to that image in the appropriate object attribute in the core data store. We have noticed that, when an update makes it to the app store, those images are not found, and thus don't display, using the references stored with the previous version of the app. Now, I have a suspicion that the

问题 I'm trying to get path to Documents folder with code: var documentsPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory:0,NSSearchPathDomainMask:0,true) but Xcode gives error: Cannot convert expression's type 'AnyObject[]!' to type 'NSSearchPathDirectory' I'm trying to understand what is wrong in the code. 回答1: Apparently, the compiler thinks NSSearchPathDirectory:0 is an array, and of course it expects the type NSSearchPathDirectory instead. Certainly not a helpful error message.

问题 I want to delete the files which are placed in a folder(inside documents folder) of documents directory. I just listed or displayed all those files on the table view , can anybody tell me how can i do this using commitEditingStyle: method. Please help me how can i achieve this.Thanks in advance. 回答1: You can use the below code to delete the file from document directory: NSError *error; NSFileManager *fileMgr = [NSFileManager defaultManager]; NSArray *paths =

问题 Im writing a text editor app and im trying to store a NSString as NSData in files in the documents folder, for example i want to be able to store a file "myText.java". My code work on the Simulator. However, on the device a file seems to be created, but when I later try to load the data from the files i get nothing. Do i have to set some project setting to enable the documents directory on device or is my code wrong? Here is my store code: -(void) saveFile:(NSString*)file{ if (![file isEqual:

问题 When trying to load files from the NSDocumentsDirectory of an iPhone, I cannot create the image source with the path string I have. I get the error message " <Error>: ImageIO: CGImageSourceCreateWithURL CFURLCreateDataAndPropertiesFromResource failed with error code -15. ", which is a kCFURLImproperArgumentsError . However, I cannot find what "proper" arguments might be. An example path would be: " /var/mobile/Applications/36D76BDF-72EC-4180-9246-CF1F50CF396C/Documents/2013080110555532Image

问题 I'm creating a registration app. It has two tabs, one tab is the registration form for students to fill out, and the other gives the user the ability to update the form. I'm still pretty new to iOS development, as well as Objective-c. Currently I'm saving a .csv file that contains the form data in the documents directory, in hopes that the app user can pull that file off the iPad and open it in microsoft excel. Unfortunately I'm not an Apple Developer yet, so I am not able to test it with a

问题 I am trying to delete a video from the document directory, but the video isn't deleting. Here is how I am trying to delete the video: //Delete Video NSError *error = nil; //NSData *videoData = [NSData dataWithContentsOfURL:self.finalURL]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *tempPath = [documentsDirectory stringByAppendingFormat:@"/vid1.mp4"]; [[NSFileManager