Initializer Element Is Not Constant

This code might look valid to less experienced iOS developers, but it does give a compiler error "initializer element is not constant":

static NSArray *playState = [NSArray arrayWithObjects:
    @"MPMoviePlaybackStateStopped",
    @"MPMoviePlaybackStatePlaying",
    @"MPMoviePlaybackStatePaused",
    @"MPMoviePlaybackStateInterrupted",
    @"MPMoviePlaybackStateSeekingForward",
    @"MPMoviePlaybackStateSeekingBackward",
    nil];

How to Debug Webtrends.framework Linker Problems

You are trying to integrate Webtrends Analytics library as Webtrends.framework into your application and linker fails with lots of undefined symbols:

Local Static Variable Lifetime Expectation in Objective-C

Something I learned today, worth remembering for performance reasons. Static variable defined inside a method is actually a global variable, which is visible only inside that method!

What this means is that you can increase your method performance by declaring variable only once and reuse it when needed next time.