CocoaEv questions

CocoaEv answers

• Core Data Problems?
• Rotating AV video preview area and other elements when using AV Foundation
• convert base64 decoded NSData to NSString
• How to use a determinate NSProgressIndicator to check on the progress of NSTask? - Cocoa
• Assertion failure using MBProgressHUD - View must not be nil
• Example for login screen modally based on storyboard
• correct way to embed base64 in json payload with afnetworking
• Storyboard Could not instantiate class named UIStoryboardUnwindSegueTemplate crash