CODEWITHSUNDEEP
iphonensstringnsdatansurlwritetofile
Ibz
Ibz

Reputation: 518

Store and Load File from URL

iPhone App

I am currently trying to understand how i can store a file from a URL to the documents directory and then read the file from the documents directory..

NSURL *url = [NSURL URLWithString:@"http://some.website.com/file"];

NSData *data = [NSData dataWithContentsOfURL:url];

NSString *applicationDocumentsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSString *storePath = [applicationDocumentsDir stringByAppendingPathComponent:@"Timetable.ics"];

[data writeToFile:storePath atomically:TRUE];

I got this code from http://swatiardeshna.blogspot.com/2010/06/how-to-save-file-to-iphone-documents.html

I want to know if this is the correct way to do this and i want to know how i can load the file from the documents directory into an NSString..

Any help will be greatly appreciated.

Upvotes: 1

Views: 2084

Answers (2)

NWCoder
NWCoder

Reputation: 5266

What you have looks correct, to read that file back into a string use:

EDIT: (changed usedEncoding to encoding)

NSError *error = nil;
NSString *fileContents = [NSString stringWithContentsOfFile:storePath encoding:NSUTF8StringEncoding error:&error];

Of course you should change the string encoding type if you are using a specific encoding type, but UTF8 is likely correct.

Upvotes: 1

Dave DeLong
Dave DeLong

Reputation: 243156

If you're doing this on your main thread, then no it's not correct. Any sort of network connection should be done in the background so you don't lock up the interface. For that, you can create a new thread (NSThread, performSelectorInBackground:, NSOperation+NSOperationQueue) or schedule it on the run loop (NSURLConnection).

Upvotes: 1

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