Category Archives: iPhone

Today I want to cover a small problem with the UITableView method scrollToRowAtIndexPath:atScrollPosition:animated. This method doesn’t work quite properly when called from an out-of-the-box UITableViewController on a navigation controller’s stack. Some special setup is needed.

While working on an iPhone app, I had occasion to create some ‘utility code’ – functions that were used by several view controllers, but that didn’t really belong to any one in particular. It wasn’t clear to me where this … Continue reading →

I’ve become a big fan of SQLite on the iPhone. One nice feature of SQLite is its transaction support; this lets you commit application state changes to disk in an “all-or-nothing” manner. To use transactions effectively, however, you may need … Continue reading →

Today, a quick note on an iPhone gotcha that recently bit me. The short version is that a UIViewControler’s navigationController property is cleared when that view controller is removed from its nav. controller, which can trip you up if you’re … Continue reading →

UIActionSheets and UIAlertViews are two slightly obscure but very handy classes that can give your iPhone app a more polished appearance with very little effort. They’re worth the few minutes it takes to read up on them.

If you work with C, or C++, or Objective-C (or C#, boo, hiss) you work with pointers. Today, I want to argue that the way everyone else declares and thinks about pointers is wrong, wrong, wrong!

Last week we began to look in detail at the backgrounds of some of the iPhone’s built-in shiny buttons. We saw that those backgrounds were really simulated 3-D grooves in the control’s parent’s surface, and that they were comprised of … Continue reading →

Working with SQLite on the iPhone, I ran across a strange (to me, anyway) interaction between prepared statements and transactions. This interaction (which I’m not sure it would be fair to call a “bug”) was causing DB writes to take … Continue reading →

Although Apple’s documentation doesn’t make too much of the point, the iPhone offers full support for SQLite. If you’re comfortable with DBs, this can be a timesaver, even for some problems for which a DB might seem like overkill. (In … Continue reading →

Editorial note: This is the first of several posts covering shiny button backgrounds. I’m breaking the topic up in order to keep the posts shorter. Also, today’s post is up a little late, due to another project. My apologies. If … Continue reading →