Divide NSData Into pieces & gather Pieces into single NSData Object for security purpose

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Following methods will help you to understand the concept of Dividing data & merging them back. Go through the comments inserted within to understand the code.

UITextField numeric entries only

Numeric Keypad only

I am going to provide here snip for limiting a textfield to numbers only. Following code-snip will help you to enter 14 digit number like a phone number including brackets (), dash – , space and backspace.