Scenario 1. I used this code for downloading files from Dropbox using Dropbox SDK.
-(void)downloadFile:(DBMetadata*)file
{
if (!file.isDirectory)
{
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *localPath = [documentsPath stringByAppendingPathComponent:file.filename];
[[self restClientForDownload] loadFile:file.path intoPath:localPath];
}
}
Scenario 2. Whenever I want to play the songs from Documents directory. it won't play when iPhone is getting Password Locked. Current song also stopped with in fraction of seconds.
It's not possible. However, you can "prevent" your phone from locking when your app is running. [UIApplication sharedApplication].idleTimerDisabled = YES should do it.
Related
For debugging purposes I've often written data to files on iOS using code such as this...
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [docsPath stringByAppendingPathComponent:testName];
FILE* resultsFile = fopen([filePath UTF8String],"w");
...and then gotten the data by downloading the container via Xcode (by selecting the app on the "Window->Devices" screen, and choosing "Download container..." from the "little gear" pop-up menu just below the list of apps.)
I recall this working on iOS 9 and previous, but trying this on iOS 10 on an iPhone 6, I'm finding it doesn't work anymore. The call to fopen is returning success for /var/mobile/Containers/Data/Application/[uuid]/Documents/testname but the file isn't in the container when I download it.
Shouldn't the file be in the container? Is it elsewhere? Or is it simply not possible to dump data to a file and pull it off the phone anymore?
I have tried to reproduce your problem (under iOS 10.3.3, Xcode 10.1) and it all worked on my end in the context of an App project. The issue you have may be related to what you do with the file object resultFile, if you could share some code containing the next lines of your code (or check that you are calling fclose() for example), it may be easier to solve it.
Also please note that it is seems NOT supported to write to the Docs directory from the code controlling an App Extension as detailed here: reading and writing to an iOS application document folder from extension
Code that worked in the context of an App project / target:
using Data in Swift like this:
guard let documentsPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last else { return }
let someData = "Hello world using swift".data(using: .utf8)
do{
try someData?.write(to: documentsPath.appendingPathComponent("hello-world.txt"))
}catch{
//handle the write error
}
using NSData with Objective C:
NSString * hello = #"Hello world using NSData";
NSData * helloData = [hello dataUsingEncoding: NSUTF8StringEncoding];
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [docsPath stringByAppendingPathComponent:#"fileNameObjcNSData.txt"];
[helloData writeToFile:filePath atomically:true];
using fopen:
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [docsPath stringByAppendingPathComponent:#"fileNameObjcFopen.txt"]; //
FILE * fileHandle = fopen([filePath UTF8String], "w");
if (fileHandle != NULL){
fputs("Hello using fopen()", fileHandle);
fclose(fileHandle);
}
Hope it helps
Just as we have UIImagePickerController to pick images into our iOS app. Is there a way to import the files in a similar manner as well? iOS 8 suggests a UIDocumentPickerViewController, but only for files in iCloud. Is there a way to import files in iOS 7?
Thanks!
Kaushil Ruparelia
iOS 8 allows you UIDocumentPickerViewController for picking files on iCloud. Other file inside your iDevice could not load or find with this controller.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSFileManager *manager = [NSFileManager defaultManager];
NSArray *fileList = [manager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *s in fileList){
NSLog(#"%#", s);
}
You can access files from your App Sandbox, and Some other type like, Images/Videos through UIImagePickerViewController.
In short, There is no way to get other files directly through any controller :(
HTH, Enjoy Coding !!
in must examples of Metaio SDK docs the xml's are loaded from Assets folder (more specifically, from NSBundle in iOS).
But in iOS, you can't write into a file in your app's bundle -- the entire bundle is read-only
https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSBundle_Class/index.html
In my project I need download all stuff to working with Metaio SDK, things like Videos, Sounds, 3D models and trackable images and your xml configs.
For example, from the Metaio docs, to work with a XML then are in Assets, are easy like:
NSString* MarkerTrackingFile = [[NSBundle mainBundle] pathForResource:#"tracking" ofType:#"xml" inDirectory:#"Assets/tracking"];
But how I said, I need to get this XML from internet, so, to do this I make an method to download.
(This is just a dirty code for study, not optimized without threads and anything special, for now)
/*********************************************/
-(void)downloadXML{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:#"%#/%#", documentsDirectory,#"markerless_tracking.xml"];
NSString *contents = [NSString stringWithContentsOfFile:filePath];
NSLog(#"%#", contents);
}
After this download, I try to use this XML in my project, I confirmed this consistence, but not work when I call him with this method, but i receive the message from error: No success loading the tracking configuration
- (void) loadTrackingConfigurationFiles
{
// Markerless tracking configuration file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* markerlessTrackingFile = [NSString stringWithFormat:#"%#/%#", documentsDirectory,#"markerless_tracking.xml"];
// We apply the correct one to the SDK
if(markerlessTrackingFile)
{
bool success = m_metaioSDK->setTrackingConfiguration([markerlessTrackingFile UTF8String]);
if( !success)
NSLog(#"No success loading the tracking configuration");
}
}
My main question is: Is possible loading a xml from outside NSBundle folder in METAIO SDK? In my project i don't have anything in local folders, everything is downloaded, tracking images, videos, sounds, xml etc, is viable the use Metaio SDK for this purpose?
I appreciate any help, examples or suggestions.
I'm running Xcode 6 Beta 5 but this has been happening since the first beta. My app's directory in the simulator keeps being renamed after each run. It took me a while to figure this out. I'm using this to get the doc's dir reference.
NSString *folder = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES) lastObject];
NSLog(#"Documents Dir: %#",folder);
Now for example on the first run it'll be:
/Users/Joey/Library/Developer/CoreSimulator/Devices/5B9930EE-A9B4-4B36-BABB-AA864ACAF2DE/data/Containers/Data/Application/4B10C2E4-A5C3-4C64-93B1-4069FCCB9C46/Documents
Second run now it's:
/Users/Joey/Library/Developer/CoreSimulator/Devices/5B9930EE-A9B4-4B36-BABB-AA864ACAF2DE/data/Containers/Data/Application/7E9EB62D-115A-4092-AD23-CB6BA3E5E10F/Documents
Third run:
/Users/Joey/Library/Developer/CoreSimulator/Devices/5B9930EE-A9B4-4B36-BABB-AA864ACAF2DE/data/Containers/Data/Application/EC8F41E8-52ED-4B10-9808-B3ACC46FC6AA/Documents
This is wreaking havoc with my app because it stores path references for certain files within the app. It's not that my NSLog statement is returning incorrect results, I verified this is what happening in Finder. It's changing the name every time. Has anyone seen this happen? Is this a "feature" that I'm misunderstanding?
Turns out Xcode 6 does in fact change the app's UUID every run, and I'm in the wrong for storing absolute paths.
USE SIMPHOLDERS
I used this app on Xcode 5 opens the Documents folder, for the currently running app in the simulator, in Finder.
http://simpholders.com/
not ready for Xcode 6 yet (as of sep 24 2014) but saves all this hassle.
In Xcode 6 / iOS8 The bundle is now separate from the data./ The application GUID is regenerated between runs in Xcode (not sure why)
DOCUMENTS DIR:/Users/gbxc/Library/Developer/CoreSimulator/Devices/AC79941F-EC56-495E-A077-773EEE882732/data/Containers/Data/Application/C220D351-0BE7-46BA-B35E-D16646C61A3F/Documents
mainBundlePath_:/Users/gbxc/Library/Developer/CoreSimulator/Devices/AC79941F-EC56-495E-A077-773EEE882732/data/Containers/Bundle/Application/12200D1D-9B67-408B-BCF7-38206CBE0940/myappname.app/BLANK_BLOG_SCALED.jpg
1. FIND THE DEVICES FOLDER in SIMULATOR
/Users/gbxc/Library/Developer/CoreSimulator/Devices/
open each /device.plist to see which GUID is which device in XCode - I think this is static
3. FIND THE DEVICE you're running on iPad 2 - I think this is static
/Devices/AC79941F-EC56-495E-A077-773EEE882732
4. Find your application /Documents folder
/AC79941F-EC56-495E-A077-773EEE882732/data/Containers/Data/Application/C220D351-0BE7-46BA-B35E-D16646C61A3F/Documents
BEWARE the GUID C220D351-0BE7-46BA-B35E-D16646C61A3F is regenerated everytime the app is run in XCode 6
NSArray *paths_ = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
if(paths_){
_docsDir = [paths_ firstObject];
DebugLog(#"DOCUMENTS DIR:%#",_docsDir);
}else{
ErrorLog(#"paths_ is nil - cant get Documents directory");
}
MAIN BUNDLE path
NSString *mainBundlePath_ = [[NSBundle mainBundle] pathForResource:#"someimageinyourbundle" ofType:#"jpg"];
/AC79941F-EC56-495E-A077-773EEE882732/data/Containers/Bundle/Application/12200D1D-9B67-408B-BCF7-38206CBE0940/clarksonsiq.app/BLANK_BLOG_SCALED.jpg
NEVER CACHE THE PATH to /Documents between runs it will change.
I was serializing it to a plist and couldnt figure out why they kept disappearing
The GUID above /Documents keeps changing between runs but if you have /Documents open in Finder the folder stays open.
https://devforums.apple.com/thread/235911?tstart=0
https://devforums.apple.com/thread/238754?tstart=0
Free Solution
Use Open Source Library OpenSim. OpenSim is an open source alternative for SimPholders, written in Swift.
Paid Solution
Use SimPholder application to know current application location.
For xcode 6.0 >
Download SimPholder 2.0 alpha 2
For xcode 5.1 <
Download SimPholders 1.5
I can confirm that this is Xcode 6 related not iOS 8.
I have two development machines. On one of them I have Xcode 5. I was working all the time on that machine and my URL's were fine (photo app, photos are visible).
Yesterday I checked in form git my source on a machine with Xcode 6. I noticed that my photos are not visible any more, only photos that are created during that app session.
After little debugging, I realized that file:///var/mobile/Applications/B6A6BAEF-C90C-4A2A-93DB-E6700B88971F/Documents/ is changing on every app run.
All that time I am working with iOS 7 device.
I am going to check once more on a machine with Xcode 5 to confirm when I get my hands on it.
You need to to save only path inside DocumentDirectory(directory/file name), and add it to the DocumentDirectory every time you load the file...
-(void)saveImage:(UIImage *)image{
NSData *pngData = UIImagePNGRepresentation(image);
NSString *pathInDocumentDirectory = [APP_DocumentDirectory stringByAppendingPathComponent:PROFILE_IMAGE_NAME];
NSString *filePath = [self documentsPathForFileName:pathInDocumentDirectory];
//Save pic file path - DirName/Filename.png
[XYZPreferencesHelper setUserImageFilePath:pathInDocumentDirectory];
//Write the file
[[NSFileManager defaultManager] createFileAtPath:filePath contents:pngData attributes:nil];
}
-(void)loadSavedUserPicture{
//Load saved DirName/Filename.png
NSString *pathInDocumentDirectory = [XYZPreferencesHelper getUserImageFilePath];
if (pathInDocumentDirectory != nil){
//Full path with new app Document Directory
NSString *filePath = [self documentsPathForFileName:pathInDocumentDirectory];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]){
NSData *pngData = [NSData dataWithContentsOfFile:filePath];
UIImage *image = [UIImage imageWithData:pngData];
if (image != nil){
userPicImageView.image = image;
}
}
}
}
- (NSString *)documentsPathForFileName:(NSString *)name
{
NSString *documentsPath = [self createRestcallDirectoryIfNotExist];
return [documentsPath stringByAppendingPathComponent:name];
}
-(NSString *)createRestcallDirectoryIfNotExist{
NSString *path;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
path = [documentsPath stringByAppendingPathComponent:APP_DocumentDirectory];
NSError *error;
if (![[NSFileManager defaultManager] fileExistsAtPath:path]) //Does directory already exist?
{
if (![[NSFileManager defaultManager] createDirectoryAtPath:path
withIntermediateDirectories:NO
attributes:nil
error:&error])
{
NSLog(#"Create directory error: %#", error);
}
}
return documentsPath;
}
Because app's UUID changes and not reliable
so we should not store urls instead we should store just file names and reconstruct url at runtime , on update/reinstall iOS creates new home directory, stores app bundle in it and copies documents files so url changes
So, my app queries an Amazon Dynamo DB database and retrieves a few kilobytes worth of data. What I want the app to do is download everything the first time, and then every time after, just download a timestamp to see if it has the most recent version of the data. So that I only have to download the data every once in a while, I'm trying to use NSKeyedArchiver to archive the array that I'm downloading. I have tried this three different ways, and none of them work on an iPhone, although two of them work on the simulator.
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:#"dataArray.archive"];
This does not work on the simulator nor the actual iphone. The result of this method is NO.
The next thing I used was the full path:
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:#"Users/Corey/Desktop/.../dataArray.archive"];
And this worked on the simulator, but not on the iPhone. My guess was that when compiled, the filesystem looks different (and obviously doesn't have the same path). So next I tried:
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"dataArray" ofType:#".archive"];
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:filePath];
Once again, this works on the simulator but fails on the iphone. I have confirmed that all of the data is in self.dataArray before writing to the archive, and confirmed that the array is nil after writing back to the archive (in the iphone version). Any ideas what's going on? Is there a better way to do the filepath?
This is what I tracked down:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent: #"dataArray.archive"];
[NSKeyedArchiver archiveRootObject:your_object toFile:filePath];
and it worked perfectly on both the simulator and the iPhone!
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:#"dataArray.archive"];
You have to provide a full path.
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:#"Users/Corey/Desktop/.../dataArray.archive"];
That is not a full path. A full path begins with / and does not have /../ anywhere.
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"dataArray" ofType:#".archive"];
You do not have permission to write inside the mainBundle, it is read only.
Also, in general you shouldn't use file paths, you should use URLs. Some APIs (including this one) requires a path but URLs are the recommended approach these days.
Here's the proper way to write the file to disk:
NSURL *applicationSupportUrl = [[NSFileManager defaultManager] URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask][0];
applicationSupportUrl = [applicationSupportUrl URLByAppendingPathComponent:#"My App"]; // replace with your app name
if (![applicationSupportUrl checkResourceIsReachableAndReturnError:NULL]) {
[[NSFileManager defaultManager] createDirectoryAtURL:applicationSupportUrl withIntermediateDirectories:YES attributes:#{} error:NULL];
}
NSURL *archiveUrl = [applicationSupportUrl URLByAppendingPathComponent:#"foo.archive"];
[NSKeyedArchiver archiveRootObject:self.dataArray toFile:archiveUrl.path];