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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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