Instantiating an array by loading a plist file asynchronously, and using a block to notify the associated UITableView to reload its data.

AsyncPlistLoad.m

/*
 * Assume the following:
 *
 *     - The Plist file is called: Names.plist
 *     - @property NSArray *tableData
 *     - Callback block messages UITableView with reloadData
 */

- (void)initizeDataWithTableViewCallback:(void(^)(void))reloadDataMessage
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        
        NSString *path = [[NSBundle mainBundle] pathForResource:@"Names" ofType:@"plist"];
        self.tableData = [NSArray arrayWithContentsOfFile:path];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            // Tell the UITableView to reload its data.
            reloadDataMessage();
        });
    });
}