Mark McCorkle questions

Mark McCorkle answers

• How to turn off Core Data Write-Ahead logging in Swift using options dictionary?
• MFMailComposeViewController in Swift does not dismiss
• CAEmitterLayer emits random unwanted particles on touch events
• Size class to identify iPhone 6 and iPhone 6 plus portrait
• Send Push notifications to iOS/Android on closed WiFi nework (no internet connection) [closed]
• UIBarButtonItemStyleDone background image using the iOS 5 appearance API
• Static cell has background color on iPhone, but not on iPad - can not find the reason
• Are @3x images mandatory?
• iOS simulator crashes at startup (intermittently), no crashes on device
• UITableView dragging distance with UIRefreshControl