I have a plist (NSDictionary) which I intended can be changed by user data input. Here is what I have done.
NSString *path = (the path for the plist)
NSMutableDictionary *plistFile = [[NSDictionary dictionaryWithContentOfFile:path] mutableCopy];
[plistFile setObject:(an NSString object) forKey:(an NSString key)];
[plistFile writeToFile:path atomically:YES];
So this is what I have coded. It works well on iPad 3 (new iPad) (iOS 6.1.2) and my XCode (4.6) simulator (iOS 6). However, it does not work on my iPad mini (iOS 6.1.3). I have found the problem which is in the last step. When I wrote
BOOL success = [plistFile writeToFile:path atomically:YES];
NSLog(#"%#",#(success));
The console always prints 0 which means it does not succeed. But on my iPad 3 and simulator it prints 1, which means success.
That is all I can describe because there is no exception being thrown out or other output. By the way, my iPad 3 (on which it works) is jailbroken but the iPad mini is not. Nevertheless, I use my developer account to codesign on both devices. Can anyone help me? Or else can anyone point to me a new solution?
Try to use
NSError * error = nil;
BOOL success = [plistFile writeToFile:path options:NSDataWritingAtomic error:&error];
NSLog(#"Success = %d, error = %#", success, error);
And then check what error occures. Maybe it can helps you.
And you can write only to the document directory. You may have some troubles with your path.
I can't see from your code if you have done this, but your path needs to be the sandboxed app directory.
NSArray* pathList = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString* path = [[NSString alloc] initWithFormat:#"%#", [pathList objectAtIndex:0]];
Related
I am trying to use the SFTP library in NMSSH to download files from an ftp server and have been having trouble on my actual device. It works fine in the simulator. When I check for the file's existence in the stored directory (a created folder in my app's cache directory), the check passes on the simulator but fails on the phone. Below is the code I'm using. As a note, MainPath is the directory path and the fileListLevel1 row item is the file name with the extension.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *cacheDirectory = paths[0];
cacheDirectory = [#[cacheDirectory, #"/NewDirectory", #"/"] componentsJoinedByString:#""];
[[NSFileManager defaultManager] createDirectoryAtPath:cacheDirectory withIntermediateDirectories:false attributes:nil error: nil];
NSString *filePathToOpen = [#[MainPath, [fileListLevel1 objectAtIndex:indexPath.row]] componentsJoinedByString:#""];
bool isFile = NO;
bool isDir = NO;
isFile = [session.sftp fileExistsAtPath:filePathToOpen];
isDir = [session.sftp directoryExistsAtPath:filePathToOpen];
if (isFile){
NSString *fileToOpenNameAndPath = [#[cacheDirectory, [fileListLevel1 objectAtIndex:indexPath.row]] componentsJoinedByString:#""];
[session.sftp writeFileAtPath:filePathToOpen toFileAtPath:fileToOpenNameAndPath];
//FILE NOT FOUND ON THE PHONE - FOUND IN SIMULATOR!!!!!!!!
if ([[NSFileManager defaultManager] fileExistsAtPath:fileToOpenNameAndPath]){
NSLog(#"Found you!");
}
else if(![[NSFileManager defaultManager] fileExistsAtPath:fileToOpenNameAndPath]){
NSLog(#"Why you no there?");
}
I also tried creating the paths using the stringByAppendingPathComponent method and got the same result.
I'm new to app writing and objective c so I may be missing something fundamental here but I've been unable to find anything on this.
One additional question revolves around using the writeFileAtPath:toFileAtPath:progress command. I wonder if my issue is with the simulator writing much faster so my check happens before it is done on the phone. I'm not sure how to properly use the :progress portion as I'm unsure what type of variable the (BOOL (^)(NSUInteger sent)) is referring to or how to create one to check the progress.
Any help would be very much appreciated.
I've got an app which saves images (JPEGs) and text files in the app's documents directory. I have tested it in the xcode simulator and on two iPhones (4 and 5, running ios 7.1 and 8.1 respectively), and it works exactly as expected, and the data is preserved fine.
However after submitting it to the app store a user testing the app (using iphone 6, ios 8.1) has found that the saved data is being lost every 20 minutes or so. Does anyone know why this is and how I can solve the issue?
Would marking the files as Do Not Backup solve the issue?
For reference, data being saved in NSUserDefaults is being preserved.
Thanks in advance.
EDIT----
I should have mentioned that I am searching for the documents directory by using:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
self.docsPath = [paths objectAtIndex:0];
I am then appending self.docsPath with the string attributed to the image/file, XXXX.jpg:
self.imgPath = [self.fileName stringByAppendingString:#".jpg"];
self.tempPhotoPath = [self.docsPath stringByAppendingPathComponent:self.imgPath];
I should also clarify that the app functions normally on the iPhone 4/5, unplugged from xcode and running appstore downloaded versions of the app. So far in investigating, it is specifically the iPhone 6 that I am having the problems with, and from what I can tell it is simply clearing the documents directory every 20 minutes or so.
in Apple new documents, whenever app launches every time it generate new sandbox id. So, it you have saved image with full path then it will might lost in second app launch. It will be not showing this effect if you test on simulator or device connected to xcode. Just plug out and run ur app, you can also see this issue your self.
So, instead of save image with its path, just create a folder in Document directory and save your image at there. For path generate you can write below code: (But make sure you save image with a specific id, like imageID and then fetch same image from that imageID).
- (NSString *)documentsPathForFileName:(NSString *)name folder:(NSString*)folderName{
return [[self pathToPatientPhotoFolder:folderName] stringByAppendingPathComponent:name];
}
- (NSString *)pathToPatientPhotoFolder:(NSString *)folderName {
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask,
YES) lastObject];
NSString *patientPhotoFolder = [documentsDirectory stringByAppendingPathComponent:folderName];
// Create the folder if necessary
BOOL isDir = NO;
NSFileManager *fileManager = [[NSFileManager alloc] init];
if (![fileManager fileExistsAtPath:patientPhotoFolder
isDirectory:&isDir] && isDir == NO) {
[fileManager createDirectoryAtPath:patientPhotoFolder
withIntermediateDirectories:NO
attributes:nil
error:nil];
}
return patientPhotoFolder;
}
NSURL *urla = [NSURL URLWithString:[NSString stringWithFormat:#"%#",[self.imagearray objectAtIndex:indexPath.item]]];// imagearray for array of image url from server
NSString *thumbnailCacheKey = [NSString stringWithFormat:#"thumb-%#",[self.imageIDarray objectAtIndex:indexPath.item]];//first try to check thumb-<my image id> is exist or not.
UIImage *image = [UIImage imageWithContentsOfFile:[self documentsPathForFileName:thumbnailCacheKey folder:#"thumb"]];//this will check thumb-<my image id> in ur sandbox
if (!image){
UIImage *imageToSave = //
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:#"thumb"];
// New Folder is your folder name
NSError *error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
[[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];
NSString *filePath = [stringPath stringByAppendingPathComponent:thumbnailCacheKey];
NSData *pngData = UIImageJPEGRepresentation(image, 0.8);
[pngData writeToFile:filePath atomically:YES];
}
else{
yourimageView.image = image;
}
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
Trying to Display the load the image from the folder present on MAC desktop using path like (/Users/sai/Desktop/images/aaa.jpg) Which is created in plist file called Data.plist at item0.
As im using NSBundle it is diaplying the image path but not loading the image from the desktop .I have done a lots of research still couldn't find the solution .Plz help me .Here is the code
NSString *path=[[NSBundle mainBundle]pathForResource:#"Data" ofType:#"plist"];
NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:path];
NSString *errorDesc = nil;
NSPropertyListFormat format;
NSDictionary *temp = (NSDictionary *)[NSPropertyListSerialization propertyListFromData:plistXML mutabilityOption:NSPropertyListMutableContainersAndLeaves format:&format errorDescription:&errorDesc];
NSArray *array=[NSArray arrayWithArray:[temp objectForKey:#"images"]];
NSString *object=[array objectAtIndex:0];
NSLog(#"object at index i %#",[object lastPathComponent]);
NSString *image=[object lastPathComponent];
mImageView.image=[UIImage imageNamed:image];
[self.view addSubview:mImageView];
Here is the screen shot of Data.plist
Simple and Short answer : It is not Possible to get image from MAC desktop, So please it better to stop fighting with it :)
It is different for mobile (iPhone application) and desktop (mac application), but why you want to do this ?? you know that your iOS application install in Apple iPhone ???? if your application is related to iOS ? then how you connect it to MAC OS ??
Best and simple way is put this image in Application Bundle or your Application's document directory and get it.
I have a "Write" button that takes whatever in a Textfild, and appends to a designated file. I also have a "Read" button that reads from the content of the designated file, and displays it on the screen. The "Write" button calls writeDataToFile:(id)sender, and the "Read" button calls readDataFromFile:(id)sender.
The problem is that the following simple code works fine on iPhone 6.1 Simulator (Xcode 4.6.2), but does not display anything in a read device, e.g., iPod with iOS 6.1.3.
I suspect the problem is something related to encoding:NSUTF8StringEncoding. However, I tried NSUTF16StringEncoding and NSUTF32StringEncoding, and it still didn’t work on the real device (but disply scrambled words on Simulator).
Where did I do wrong? I would appreciate very much if somebody can give me some pointers.
- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [documentPaths objectAtIndex:0];
_fileName = [documentsDirectory stringByAppendingPathComponent:#"data.txt"];
}
- (IBAction)writeDataToFile:(id)sender {
NSString *str = tfData.text;
str = [str stringByAppendingFormat:#"\n"];
_fileHandle = [NSFileHandle fileHandleForUpdatingAtPath:_fileName];
[_fileHandle seekToEndOfFile];
//convert NSString to NSData
[_fileHandle writeData: [str dataUsingEncoding:NSUTF8StringEncoding]];
[_fileHandle closeFile];
[tfData resignFirstResponder];
}
- (IBAction)readDataFromFile:(id)sender {
[tfData resignFirstResponder];
//lbOut is a UILabel
lbOut.text = [NSString stringWithContentsOfFile:_fileName encoding:NSUTF8StringEncoding error:NULL];
}
Try to diagnose whether the file exists when you try to read from it. You can do this with NSFileManager. Also check whether the file has the right size (or at least a non-zero size).
Also, have you checked whether stringWithContentsOfFile actually returns a string? If an error occurs it will return nil and not raise an exception. If you get nil you can pass an NSError object to stringWithContentsOfFile and it will let you know what went wrong.
Start by checking your return values. If I had to make a guess I would say that the file at _fileName does not exist. If the file doesn't exist fileHandleForUpdatingAtPath: will return nil. And each subsequent call on the fileHandle will fail silently.
So you should check if fileHandleForUpdatingAtPath: actually returns a fileHandle. If it doesn't, create a fileHandle by using fileHandleForWritingAtPath:.
In a similar way you should check if the conversion to NSData has failed. I used NSParameterAssert, which will crash your app if stringData is nil, because I think there is no way to recover from a failed NSString conversion. If you think there is a way to recover from this error replace the NSParameterAssert with a if (!stringData) statement.
_fileHandle = [NSFileHandle fileHandleForUpdatingAtPath:_fileName];
if (!_fileHandle) {
NSLog(#"File does not exist at path \"%#\". Create it.", _fileName);
_fileHandle = [NSFileHandle fileHandleForWritingAtPath:_fileName];
}
// should have a valid fileHandle here
[_fileHandle seekToEndOfFile];
NSData *stringData = [str dataUsingEncoding:NSUTF8StringEncoding];
NSParameterAssert(stringData); // will raise an exception if stringData is nil
[_fileHandle writeData:stringData];
I found the problem. The problem is with the binding of _fileHandle. I declare this public variable, and binds it with a NSFileHandle associated with the file I intended to write using
[NSFileHandle fileHandleForWritingAtPath:_fileName]. I intended to keep using the _fileHandle from different ViewControllers without the need to bind it with the file every time I use it. It resulted the problem I described (i.e., works fine on Simulator, but not on real device).
Once I re-bind _fileHandle with NSFileHandle initialization every time I use it, it works fine now.