Get current firstResponder object.

Get an object what bring keyboard popped.

iTunes API, lookup by bundle ID

Get application resource, using iTunes API.

UITextView's detected link and using pointInside function.

Textview touch event flow down except link attribute text.

About for View and ViewContoller instantiate.

Object init and Xib, Storyboard.

Extention for VC shared instance and pop/push operation.

Some extention code for viewContoller.

Make superscript text with NSAttributedString.

Add baselineOffset attribute for superscript.