I generated a pdf file in my program and I have it here :
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *file = [documentsDirectory stringByAppendingFormat:#"/CEX.pdf"];
NSData *data = [NSData dataWithContentsOfFile:file];
I know how to save photos in the photo gallery but have no idea what should I do with pdf file and how and where to save it in the device. Can anyone help me please ?! :)
The code you posted is for reading an existing PDF file from the Documents directory.
If you want to write the PDF, you need to get the NSData object representing the PDF, create a path to the file, then use the NSData writeToFile:options:error: method to save the data to the file.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *file = [documentsDirectory stringByAppendingPathComponent:#"MyDocument.pdf"];
NSData *pdfData = ... // data representing your created PDF
NSError *error = nil;
if ([pdfData writeToFile:file options:NSDataWritingAtomic error:&error]) {
// file saved
} else {
// error writing file
NSLog(#"Unable to write PDF to %#. Error: %#", file, error);
}
BTW - in your original code, replace:
NSString *file = [documentsDirectory stringByAppendingFormat:#"/CEX.pdf"];
with:
NSString *file = [documentsDirectory stringByAppendingPathComponent:#"CEX.pdf"];
Don't use string formats unless you really have a string format to process.
Related
I want to read and print the file's content which downloaded from dropbox but my "readFile" method prints null. I am sure the file is downloaded successfully.
-(void)download
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#", #"File.txt"]];
[[self restClient] loadFile:#"/File.txt" intoPath:filePath];
}
- (void)restClient:(DBRestClient*)client loadedFile:(NSString*)localPath
contentType:(NSString*)contentType metadata:(DBMetadata*)metadata {
[self readFile:#"File.txt"];
NSLog(#"File loaded into path: %#", localPath);
}
-(void)readFile:(NSString *)fileName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileNameData=[NSString stringWithFormat:#"%#",fileName];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileNameData];
NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];
NSError *error;
NSString *str = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];
NSLog(#"%#", error);
}
and this is output:
---------******** CONTENT OF THE DOWNLOADED FILE *********------------(null)
I updated my code for capture erorr and I am getting this error from stringWithContentsOfFile:
Error Domain=NSCocoaErrorDomain Code=261 "The operation couldn’t be completed. (Cocoa error 261.)" UserInfo=0x1669c2b0 {NSFilePath=/var/mobile/Applications/11B10727-E372-1147-26BD-1D24S60B8E54/Documents/File.txt, NSStringEncoding=4} 2013-08-05 22:06:03.229 DBApp[496:60b]
It looks like your code is reading a file called "File.txt" rather than the actual file that was downloaded from Dropbox. Am I missing something?
EDIT
Based on the comments below, it looks like the error is 261, related to string encoding. You might want to try a different encoding or ensure that the text file is encoded the way you expect it to be.
How to save the pdf locally
I have loaded the pdf doc into imageView. Now i need to save into locally into iPhone device.
Any one advice me how to save the pdf file from image view
#All
Thanks in advance
For saving the pdf in document directory use below code.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:#"data.pdf"];
NSData *thedata = [NSData dataWithContentsOfURL:[NSURL URLWithString:`ADD URL OF PDF DATA`]];
[thedata writeToFile:localFilePath atomically:YES];
For retrieving the pdf use below code.
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:#"data.pdf"];
if ( [[NSFileManager defaultManager] fileExistsAtPath:localFilePath] ) {
NSData *data = [NSData dataWithContentsOfFile:localFilePath];
}
I need to put separate lines into a file, but it seems that it's not supported by
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:#"myFile"];
[dataString writeToFile:appFile atomically:YES];
It does put a string to a file but it overwrites previous one.
Any suggestions?
To append data to an existing file, create an NSFileHandle instance for that file, then call -seekToEndOfFile and finally -writeData:. You'll have to convert your string into an NSData object yourself (with the correct encoding). And don't forget to close the file handle when you're finished.
The easier, but also less efficient way, is to read the existing file contents into a string, then append the new text to that string and write everything out to disk again. I wouldn't do that in a loop that executes 2000 times, though.
Thanks Ole! That's what I've been looking for.
Some sample code for the others:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
//creating a path
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:#"nameOfAFile"];
//clearing or creating (NSFileHande doesn't support creating a file it seems)
NSString *nothing = #""; //remember it's CLEARING! so get rid of it - if you want keep data
[nothing writeToFile:appFile atomically:YES encoding:NSUTF8StringEncoding error:nil];
//creating NSFileHandle and seeking for the end of file
NSFileHandle *fh = [NSFileHandle fileHandleForWritingAtPath:appFile];
[fh seekToEndOfFile];
//appending data do the end of file
NSString *dataString = #"All the stuff you want to add to the end of file";
NSData *data = [dataString dataUsingEncoding:NSASCIIStringEncoding];
[fh writeData:data];
//memory and leaks
[fh closeFile];
[fh release];
[dataString release];
I am calling –writeToFile:atomically: on an NSData object which contains a video I just shot.
The file is not being written and if I use the version that returns an erorr object, the error is nil.
My code is:
if ([[info valueForKey:UIImagePickerControllerMediaType] isEqualToString:#"public.movie"]) {
NSURL* url = [info valueForKey:UIImagePickerControllerMediaURL];
NSData *videoData = [NSData dataWithContentsOfURL:url];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fPath = [documentsDirectory stringByAppendingPathComponent:#"capturedVideo.MOV"];
[videoData writeToFile:fPath atomically:YES];
}
The return value is NO and when I check the existence of the written file, it is not there.
Any ideas?
Try creating file with NSFileManager before writing to it.
How to make file read/write operation on iPhone?which is the path i need to specify to save the file? how can i get the current working directory in iPhone?
Thank You
Write to a file:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
// the path to write file
NSString *myFile = [documentsDirectory stringByAppendingPathComponent:#"myFile"];
[data writeToFile:myFile atomically:YES];
Read a file:
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"MyFile" ofType:#"txt"];
NSData *myData = [NSData dataWithContentsOfFile:filePath];
if (myData) {
// do something useful
}