iOS Roundup: April 9, 2012

April 10, 2012 Pivotal Labs

Cool Things This Week:

Now instead of dealing with state variables on viewDidAppear, we can use a completion block when a Modal View Controller is done animating: Model View Controller Completion Block (+1 for iOS 5)
LLDB Debugger comes with the new Xcode 4.3.2. Now we can use ObjC’s dot syntax in the debugging console, saving us hundreds of keystrokes a day! (+1 for Xcode 4.3.2)
QuickDialog – A quick and easy way to make forms out of tableviews when prototyping an app!

Headaches This Week:

UIButton Edge Insets, we still find them unintuitive and confusing. We will continue rolling out our own button implementations.
Remember to be careful when parsing JSON (DOM parsing), check the type is what you expect before using it, for example:
```
if ( [root objectForKey:@"article"] &&
[[root objectForKey:@"article"] isKindOfClass:[NSString class]] ) {
// compute!
}
```
If the API changes, the parser may return unexpected results (NSNull is a common unexpected result).

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