Error when trying to save indexPath to NSUserDefaults

nsindexpath, nsuserdefaults, objective-c

Solution

Read the documentation of `NSUserDefaults > setObjectForKey`:

"The value parameter can be only property list objects: NSData, NSString, NSNumber, NSDate, NSArray, or NSDictionary. For NSArray and NSDictionary objects, their contents must be property list objects. See “What is a Property List?” in Property List Programming Guide."

To save an indexPath in the UserDefaults, you would have to make another representation, e.g. as a dictionary:

[[NSUserDefaults standardUserDefaults] setObject:@{@"row": @(indexPath.row),
                                                   @"section": @(indexPath.section)}
                                          forKey:@"CollectionIndex"];

Problem

I am trying to save the indexPath for UICollectionView, but I get the following error: ``` libc++abi.dylib: terminating with uncaught exception of type NSException ``` My code is: Save index path: ``` [[NSUserDefaults standardUserDefaults] setObject:indexPath forKey:@"CollectionIndex"]; [[NSUserDefaults standardUserDefaults] synchronize]; ``` Load indexPath: ``` NSIndexPath *storedIndexPath = [[NSUserDefaults standardUserDefaults] objectForKey:@"CollectionIndex"]; ``` I have commented out code to find out which code that makes the error, and it is the code I am using to save the indexPath that creates the SIGABRT error.

Original source