NSUserDefault-无法获取值

Question

In didSelectRowAtIndexPath Method of tableView , I am saving some data in NSUserDefault like this

UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
NSUserDefaults *storeData=[NSUserDefaults standardUserDefaults];
[storeData setObject:selectedCell.textLabel.text forKey:@"tpName"];

and at another place I am fetching this data with this code ,

NSUserDefaults *storeData=[NSUserDefaults standardUserDefaults];
NSLog(@"tpName is %@",[storeData valueForKey:@"tpName"]);

But In this NSLog I am getting null value . Can Anyone suggest me where am I doing wrong ?

Answer 1

The NSUserDefaults doesn't get written out to disk until it gets synchronized. The user defaults get synchronized automatically at periodic intervals, or you can call it manually like so:

UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
NSUserDefaults *storeData=[NSUserDefaults standardUserDefaults];
[storeData setObject:selectedCell.textLabel.text forKey:@"tpName"];
[storeData synchronize];

If you are quitting your application shortly after the user defaults get set (without synchronizing manually), your standardDefaults will not be updated on disk.