Question

in my application, i have placed an empty

1. myFile.txt

when i have internet connection , i get json data from internet and save the json string in it with following code

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"myFile" ofType:@"txt"];
[myString writeToFile:filePath automatically:YES encoding:NSUTF... error:nil];

//now while retrieving it when no internet connection
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"myFile" ofType:@"txt"];
NSString *myString = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF..  error:nil];

now myString returns with @""… why i am not been able to write data?

Best Regards

Answer 1

Whatever you want to do is not possible (or at least strongly discouraged) to update files in the app bundle.

If you’re downloading files and want to store them on the device you should use the Documents directory. You can get the path to this directory with:

- (NSString *)getDocumentsDirectory {  
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
    return [paths objectAtIndex:0];  
}