https://duan.ca/tag/cocoa/ <p>You have a <code>UITableViewController</code> with a couple of static cells, you want to invoke some code for each cell in the delegate. Here's a quick way to do it:</p> <pre><code> - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { SEL action = (SEL[]){@selector(method1), @selector(method2)}[indexPath.row]; ((void (*)(id, SEL))[self methodForSelector: action])(self, action); } </code></pre> <p>It's got everything you love about C and Objective-C: array literals, function pointers, casting, selectors and something called <a href="http://www.cocoawithlove.com/2008/02/imp-of-current-method.html">IMPs</a>.</p> <p>This piece of code maps selected cells to methods by putting methods by indexing selectors in a C array.</p> <p>Why all the fuss on the second line? wouldn't a simple <code>performSelector:</code> work? The short answer is: to show the compiler that we are responsible adults. You can read more about it [here](SO Answer);</p> Sat, 03 May 2014 13:42:00 -0600 https://duan.ca/2014/05/03/tableview58didselectrowatindexpath58-in-two-lines/ https://duan.ca/2014/05/03/tableview58didselectrowatindexpath58-in-two-lines/