I'm having an issue with loading existing images from the App's Documents Folder after ad-hoc update.
I've searched the internet for answers and I've found that I must use relative paths to files in order for the path to remain the same when the App is updated.
Can someone please show me how to do it ?
Right now I use the following to save the files (images) when ImagePicker finishes:
NSString *imageFilename = [NSString stringWithFormat:#"%#-profilePhoto.jpg",[NSDate date]];
NSArray *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
imagePath = [NSString stringWithFormat:#"%#/%#", paths, imageFilename];
Please help me out !
I've found the solution:
Instead of loading the images from the full path, I chose to make the system search for them after their name.
So instead of:
//Full path stored in a dictionary:
profilePhotoPath = [userDict objectForKey:#"profilepic"];
//Load the image from path:
profilePhoto = [[UIImage alloc] initWithContentsOfFile:profilePhotoPath];
I now use the following:
//Load image from documentsDirectory, filename
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
profilePhotoPath = [userDict objectForKey:#"profilepic"];
profilePhotoPath = [documentsDirectory stringByAppendingPathComponent:[profilePhotoPath lastPathComponent]];
profilePhoto = [[UIImage alloc] initWithContentsOfFile:profilePhotoPath];
By using "lastPathComponent" attribute I'm basically stripping out everything from the path except the filename and then I use NSSearch to give me my file.
This line makes the problem
NSArray *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
Here the issue is the variable paths is of type NSArray not NSString
Change it to,
NSString *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
or
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *paths = [path objectAtIndex:0];
Related
I am getting nil image when i try to set image from local file path (Caches directory)
file:///......
NSString* localImagePath=#"file:///Users/mac/Library/Application%20Support/iPhone%20Simulator/7.1/Applications/BD2135B6-5E03-4797-960E-B6C2BF2D6958/Library/Caches/myImage.jpeg"
[[UIImage alloc]initWithContentsOfFile:localImagePath];
I searched through many questions but not able to find the right way to do it.
- (IBAction)saveImage {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:#"savedImage.png"];
UIImage *image = imageView.image; // imageView is my image from camera
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:NO];
}
May be the issue was of url encoding so I solved this by getting the caches directory path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cacheDirectory = [paths objectAtIndex:0];
NSString *localImagePath = [cacheDirectory stringByAppendingPathComponent:#"myImage.jpeg"];
[[UIImage alloc]initWithContentsOfFile:localImagePath];
I saved an image in the documents directory, but when I tried to read it, it appears that the file wasnt saved at all.
The read path is OK, the same as the save one.
[_IDBanners addObject:#"44"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
NSString * name = [NSString stringWithFormat:#"%#.png",[_IDBanners objectAtIndex:i]];
NSString *filePath = [documentsPath stringByAppendingPathComponent:name]; //Add the file name
NSData *pngData = [NSData dataWithContentsOfFile:filePath];
UIImage *image = [UIImage imageWithData:pngData];
When I log:
NSLog(#"%#",image);
it returns (null).
I need to look for files with a specific type and put them in an array. I've found code like this:
NSArray* pdfs = [[NSBundle mainBundle]
pathsForResourcesOfType:#"pdf" inDirectory:nil];
But this code accesses my application bundle, not the Documents directory.
I also found this code for getting the Documents directory:
NSString* doc = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);;
However, I just don't get how to get the path for a pdf file inside the Documents folder. I already tried to change the values of the parameters for inDirectory: in pdfs to be #"~/Documents" and still it can't change the directory path.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:#"abcd.pdf"];
BOOL success = [[NSFileManager defaultManager] fileExistsAtPath:documentsDirectory];
if (success == YES){
//Do your stuff here if file found at documents directory
}
else{
//file not found
}
To get the array of files at document directory :
NSError **error1;
NSArray *paths2 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDirectory2 = [paths2 objectAtIndex:0];
NSArray *array = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsDirectory2 error:error1];
Is there a way to write a string , which is read from text field, to a .txt file?
NSString *input = [textfield text];
NSString *path = #"myText.txt";
[input writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:NULL];
Yes, ultimately that is the way; but there's a number of other steps you do in order to get from start to finish (you need to have textfield connected to an IBOutlet or in some other way accessible; the path where myText.txt is writing to needs to be writable and therefore you'd probably need to have a longer, more precise path than just the filename; you'd probably need to also send in an actual error parameter that could be set so you could look at the errors being returned when the writeToFile call fails the first few times you run this code).
You will need to define a path, basically where to save the file.
This code will find the Documents folder
NSArray *path = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirPath = [path objectAtIndex:0];
Here is the code I use to read and write files.
-(void)writeFileToDisk:(id)data
{
NSArray *path = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirPath = [path objectAtIndex:0];
NSString *fileName = #"MyFileName.txt";
NSString *fileAndPath = [documentDirPath stringByAppendingPathComponent:fileName];
[data writeToFile:fileAndPath atomically:YES];
}
-(void)readFileFromDisk
{
NSArray *path = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirPath = [path objectAtIndex:0];
NSString *fileName = #"MyFileName.txt";
NSString *fileAndPath = [documentDirPath stringByAppendingPathComponent:fileName];
NSArray *array = [[NSArray alloc] initWithContentsOfFile:fileAndPath];
NSLog(#"%#",array);
[array release];
}
I've added a very simple .csv file to my app's NSDocumentDirectory using:
-(IBAction)exportModule:(id)sender{
NSString *fileName = #"exportedfile.csv";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *exportString = #"I've,been,exported";
NSData *testData=[exportString dataUsingEncoding:NSUTF8StringEncoding];
NSString *docDir = documentsDirectory;
NSString *completePath = [docDir stringByAppendingPathComponent:fileName];
[testData writeToFile:completePath atomically:YES];
if ([[NSFileManager defaultManager] fileExistsAtPath:completePath]) {
NSLog(#"Theres a file here!");
}
}
The app gets into the if statement printing "Theres a file here!", however I would like open the file and see if there were any problems in formatting the .csv.
If I were running on a physical device, I'd be able to open it up in iTunes and take a look there, but is there a way to examine the .csv while only using the simulator?
I have this at the beginning of all of my programs for using the simulator
NSLog(#"Documents: %#", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]);