how to remove all objects from Core Data

Question

how can I remove all objects? I know I can remove one by

[managedObjectContext deleteObject:objToDelete];

is it possible to delete all wit

Answer 1

When you remove all the cache and documents, you are deleting the database. Not is necesary call to managedObjectContext

NSArray *documents = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSArray *caches = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSMutableArray *paths = [NSMutableArray array];
[paths addObjectsFromArray:documents];
[paths addObjectsFromArray:caches];
for (NSUInteger i = 0; i < [paths count]; i++) {
    NSString *folderPath = [paths objectAtIndex:i];
    NSLog(@"Attempting to remove contents for: %@", folderPath);
    //Remove all cached data in the local app directory
    NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:&error];
    for (NSString *strName in dirContents) {
        [[NSFileManager defaultManager] removeItemAtPath:[folderPath stringByAppendingPathComponent:strName] error:&error];
        if (error != nil) {
            NSLog(@"Error removing item: %@ : %@", strName, error.description);
        } else {
            NSLog(@"Removed item: %@", strName);
        }
    }
}