Ian MacDonald questions

Ian MacDonald answers

• How does UIViewController manage to have a default no-args initializer in Swift?
• Angular 6: How to unsubscribe rsjx interval or timer?
• what does double square brackets mean in swift?
• Understanding ios UIView animation block and dispatch_async(dispatch_get_main_queue) block
• Get the object with the most recent date
• Handle open multiple URLs in AppDelegate
• What does registering a call for cell reuse actually do?
• Finding out if the device is locked, from a Notification Widget
• Swift Retain Cycles and Closures
• What does the code parameter in EXC_BAD_ACCESS mean?