So I'm pretty lost with this one and really new to epub files. I've done a bit of searching but can't seem to put everything together in my head.
My app uses DropBox's Chooser API to get a file from a user's DropBox folder. In this case, I want to open up a .epub file. So when the user chooses a file, the DropBox API gives me back an NSURL object to that file. For example:
https://dl.dropboxusercontent.com/1/view/e8bmxpkree6nc67/The%20Art%20of%20War.epub
And now, I've tried a couple different tools to try to read this file. Originally, I tried using KFEpubKit. But when I called:
epubURL; // The url from DropBox (shown above)
NSURL *documentsURL = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
self.epubController = [[KFEpubController alloc] initWithEpubURL:epubURL andDestinationFolder:documentsURL];
self.epubController.delegate = self;
[self.epubController openAsynchronous:YES]
I would get back an error that the file couldn't be unzipped. The error reads as:
Epub Error: Error Domain=KFEpubKitErrorDomain Code=1 "Could not extract epub file." UserInfo=0x170275400 {NSLocalizedDescription=Could not extract epub file.}
I looked into the code and narrowed down the problem a little bit. The KFEpubKit uses the SSZipArchive utility to unzip files. And from this point on, I'm a bit stuck. The [SSZipArchive unzipFileAtPath: toDestination:] call seems to be failing when used with the epubURL.path. I'm not sure if this has something to do with the fact that my file is a .epub extension and not a .zip extension. Or maybe there's some stuff to do after getting the URL from DropBox and before giving it to the KFEpubKit tool?
In the end, I'm expecting to have to display the text of the book with a UIWebView. But I'm just not sure how to handle this .epub file. What should I do with the file from Dropbox? Any help is much appreciated.
A quick glance indicates that that SSZipArchive wants a local file URL, not a remote HTTP URL. Try downloading the file first (NSData with contents of URL, then write to some temp file) then create a file URL that points to the temp file, and send that into the KFEpubController:
// Download the file from dropbox
epubURL; // The url from DropBox (shown above)
NSData * epubData = [NSData dataWithContentsOfURL:epubURL];
NSString * tempPath = [NSTemporaryDirectory() stringByAddingPathComponent:#"temp.epub"];
[epubData writeToFile:tempPath atomically:YES];
NSURL *tempURL = [NSURL URLWithString:tempPath];
NSURL *documentsURL = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
self.epubController = [[KFEpubController alloc] initWithEpubURL:tempURL andDestinationFolder:documentsURL];
// etc.
(Coding from memory.) All normal caveats apply here-- you'll want to do proper progress/error handling on the download, get rid of the temp file, etc, etc.
Related
I am a React native developer and I was trying to integrate a native ios code.
One of the instance takes NSURL * which should be a local path I guess
https://github.com/uber/startup-reason-reporter/blob/master/StartupReasonReporter/StartupReasonReporterPriorRunInfo/UBApplicationStartupReasonReporterPriorRunInfo.h#L21
+ (nonnull instancetype)priorRunAtDirectoryURL:(nullable NSURL *)directoryURL;
I am not sure what does localPath Url looks like in IOS, like what should I pass? for example?
Ps: intentionally including swift tag as well because I think swift developers could also answer it.
Based on description of that function:
Returns the prior run information stored to disk at the given directory URL.
#param directoryURL The directory to use to to store the startup reason data.
#return the previous startup reason data if it was present on disk, or empty startup reason object.
*/
you need to provide a directory they can write into. So Apps's document directory would be the best (as a root) + whatever folder you want (which, based on their code, they will even create for you).
So:
NSURL* docs = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
NSURL* myCrashes = [docs URLByAppendingPathComponent:#"myCrashes" isDirectory:TRUE];
it will look something like:
file:///some/path/to/app/sandbox/data/Documents/myCrashes
Try looking up documentation for
- (NSArray<NSURL *> *)URLsForDirectory:(NSSearchPathDirectory)directory
inDomains:(NSSearchPathDomainMask)domainMask;`
That will get you the URL and check out FileManager.SearchPathDirectory enum for all the viable options:
Here's an example for getting the caches directory
NSURL* url = [[[NSFileManager defaultManager] URLsForDirectory:NSCachesDirectory inDomains:NSUserDomainMask] lastObject];`
It could be any one of the 25-26 options in SearchPathDirectory depending on where they put that stuff.
After I build an app with sqlite. I have installed SQLite manager in Firefox. Doesn´t help because I really don´t know where is that file. I tried many ways.
And finally I try to find this file
_databasePath = [[NSString alloc] initWithString:[docsDir stringByAppendingPathComponent:#"myUsers.db"]];
To open with MesaSQLite
Still have the same problem. Where is my file.
Here is the last way I have used:
/Users/{YOUR NAME}/Library/Developer/CoreSimulator/Devices/{DEVICE ID}/data/Containers/Data/Application/{APPLICATION ID}/
I still can not find it. I have open almost every project folders.
Please help me.
Dont open Library on MacintoshHDD. You need to open Library on your USERName Folder. There,normally library folder is hidden. You need to follow the following to see the hidden files.
Or simply copy paste the path into the search finder on your mac.It will take you directly.
The long way to show hidden Mac OS X files is as follows:
Open Terminal found in Finder > Applications > Utilities.
In Terminal, paste the following:
defaults write com.apple.finder AppleShowAllFiles YES.
Press return.
Hold 'alt' on your keyboard, then right click on the Finder icon in the dock and click Relaunch.
You should be able to find this using this method :
- (NSURL *)applicationDocumentsDirectory
{
NSLog(#"%#",[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]);
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
Just copy paste whatever is logged in navigate into the folder where you stored your sqlite file
The end result should look like this :
~/Library/Developer/CoreSimulator/Devices/4D2D127A-7103-41B2-872B-2DB891B978A2/data/Containers/Data/Application/0323215C-2B91-47F7-BE81-EB24B4DA7339/Documents/MyApp.sqlite
Please note that the long ID's will obviously be different, as well as the file name.
You just following line of code to Log.
NSString *databasePath = [[NSBundle mainBundle] pathForResource:#"myUsers" ofType:#"db"];
Or use below code.
NSBundle* bundle = [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:#"myUsers" ofType:#"bundle"]];
NSLog(#"%#", bundle);
NSString* test = [bundle pathForResource:#"myUsers" ofType:#"db"];
NSLog(#"%#", test);
NSDictionary* dict = [NSDictionary dictionaryWithContentsOfFile:[bundle pathForResource:#"Root" ofType:#"plist"]];
NSLog(#"%#", dict);
I am using the Core Data Editor a lot for my iOS projects. It is compatible with Mac and iOS applications and support XML, SQLite and binary stores, etc. It is free. :-)
http://thermal-core.com/CoreDataEditor/
I am having problems updating an app to iOS7 SDK. Before I've used iOS 6 SDK and accessed my mp3 file using a NSURL for the folder like this:
NSURL *folderURL = [[NSBundle mainBundle] URLForResource:#"" withExtension:#"" subdirectory:#"AudioGuide"];
Now, using the iOS 7 SDK I always get nil as the value for folderURL and my audio guide doesn't find the mp3's anymore.
I've already looked into the generated .app-Bundle for the simulator (in ~/Library/Application Support/...), and I can see the "AudioGuide" folder in the root. So it's definitly there.
I am not that iOS guru and didn't really follow iOS7 updates. Has there been any changes made on how to access own assets in an app? How do I access my files?
Apple doc for - (NSURL *)URLForResource:(NSString *)name withExtension:(NSString *)extension subdirectory:(NSString *)subpath
Returns the file URL for the resource file identified by the specified
name and extension and residing in a given bundle directory.
what that means is you can get the file URL with specific type in a given subdirectory, so you should use this method call with your file name and extension.
If you are trying to read the list of files under that directory, what you can do is bundle all of your audio files in a single zip or gzipped file and you extract it in your Documents or Application Support directory when it is accessed for the very first time, then you can read it using the code below.
NSArray *directories = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *directory = [directories objectAtIndex:0];
NSString *audioDirectoryPath = [directory stringByAppendingPathComponent:#"AudioGuide"];
NSArray *audioFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:audioDirectoryPath];
Hope this helps!
I have found that so far the path sent to application:openURL:sourceApplication:annotation: is:
file://localhost/private/var/mobile/Applications/<GUID>/Documents/Inbox/file
To check that the filesystem operations that I am about to perform are indeed likely to succeed (and that the url given to me is not a location outside the sandbox), it looks like I have to do this:
NSString* hdurl = [[#"file://localhost/private" stringByAppendingString:NSHomeDirectory()] stringByAppendingString: #"/"];
NSString* path = url.absoluteString;
if ([path hasPrefix:hdurl]) {
// now ready to e.g. call fopen on: [path substringFromIndex:#"file://localhost".length]
Now, I seem to vaguely recall (and this is probably wrong) that in the past I have seen the file:/// style URL being used. That would clearly cause this code to fail.
How am I to know that it will always give me a file://localhost URL prefix?
Apple's documentation on URLs is strangely missing a section on file URLs.
An NSURL that points to a file on the local file system is called a "file URL". To convert the NSURL to an NSString representing the file's path you use:
NSString *filePath = [url path];
To check to see if an NSURL represents a file URL, use:
BOOL isFileURL = [url isFileURL];
Keep in mind that if your app is passed a file URL, you will always have access to the file. There is no need to check if it starts with any prefix. Why would iOS pass you a file that you don't have access to?
This is my first real project. I have an app that captures several seconds of video using AVFoundation, outputs this to a file in the documents directory and lets the user preview the video before they upload it using HTTP and a PHP script on my website.
All the video capture and preview work perfectly but I am stuck on uploading the video file.
I learnt a lot from this simpleSDK video which shows how to achieve the desired effect using a video file stored in the apps main bundle.
The code from the tutorial that set up videoData ready to upload originally looked like this:
NSData *videoData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"Movie" ofType:#"mov"]];
NSString *urlString = #"http://www.iphonedevnation.com/video-tutorial/upload.php";
The filename of the video file that I need to upload is always unique and generated using CFUUIDCreateString. I join this string to the path for the documents directory, add ".mov" to the end of it and save it into a text file for retrieving later.
This all works as I am able to retrieve the filename from the file and use it to preview the movie clip elsewhere in the app.
My path is in an NSString, that I have tried converting to NSURL and removing the file suffix to get it to work with the NSData *videoData.........line but it doesn't compile, I get an "No known class method for selector 'dataWithContentsOfFile:ofType.' error. I am targeting iOS 5 and using Xcode 4.3 with ARC and Storyboards.
I've been at this for best part of 5 hours now so hopefully someone can help. My code, which included tips from elsewhere on converting from a NSString to NSURL follows:
NSString *content = [[NSString alloc] initWithContentsOfFile:lastSavedTalentFilenamePath
usedEncoding:nil
error:nil];
NSLog(#"content=%#",content);
//Need to now remove the '.mov' file type identifier
NSString *shortContent= [content substringToIndex:[content length]-4];
NSLog(#"***************shortContent***************%#", shortContent);
NSURL *convertedContent = [NSURL fileURLWithPath:shortContent];
NSLog(#"***************convertedContent***********%#",convertedContent);
NSData *videoData = [NSData dataWithContentsOfFile:convertedContent ofType:#"mov"];];
There is no NSData method called dataWithContentsOfFile:ofType:
The methods available are:
+ dataWithContentsOfFile:
+ dataWithContentsOfFile:options:error:
both of which take the file location as an NSString so there's not need to convert to an NSURL