I want to save an NSMutableArray
or NSDictionary
as a permanent file. Then, I would like to reopen the file later.
Is this possible? If so, how can I do it?
To write in file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectory stringByAppendingPathComponent:FILE_NAME]; [myArray writeToFile:filePath atomically:YES];
To read from file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectory stringByAppendingPathComponent:FILE_NAME]; myArray = [NSArray arrayWithContentsOfFile:filePath];
myArray will be nil if file is not present. And NSDictionary has similar methods. Please check the reference for the details of these methods.