Save locally generated PDF to app's documents folder in iOS8 - pdf

Question

It would seem that my apps no longer are able to save files to their documents folder when doing this:
NSString *path = [documentsDirectory stringByAppendingPathComponent:fileName];
NSData *dta = [[NSData alloc] init];
dta = [NSData dataWithContentsOfFile:path];
NSLog(#"writing file: %#", path);
if ([dta writeToFile:path options:NSAtomicWrite error:nil] == NO) {
NSLog(#"writeToFile error");
}else {
NSLog(#"Written: %#", path);
[self addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];
}
I do get "Written" in the log with the full path:
Written: /var/mobile/Containers/Data/Application/ECBCD65D-A990-4758-A07F-ECE48E269278/Documents/9d440408-4758-4219-9c9c-12fe69cf82f2_pdf.pdf
And as long as I don't quit the app I can load the PDF in a UIWebView like this (pdfPath is a string that I pass to the function that loads the PDF file):
[www loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:pdfPath]]];
Any help at all is as always greatly appreciated.

Answer 1

Okay, after mucking about I found that since the documents directory changes path every time I run the app, I had to:
Write the file to the documents folder with the complete path to
the file:
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask ,YES );
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent: fileName];
NSData *dta = [[NSData alloc] init];
dta = [NSData dataWithContentsOfFile:path];
if ([dta writeToFile:path options:NSAtomicWrite error:nil] == NO) {
NSLog(#"writeToFile error");
}else {
NSLog(#"Written: %#", path);
[self addSkipBackupAttributeToItemAtURL:[NSURL fileURLWithPath:path]];
}
Save only the file name to my database
Load the file by using the full newly generated Documents directory path and append the file name from my database:
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent: pdfPath];