Cocoa in iOS

Background: Now days compilation process for any language is divided into two parts and same is applicable for objective c. Frontend Compiler (Clang) Backend Compiler (LLVM) Frontend Compiler (Clang):  Responsibility of front-end compiler is to take a source code and convert into intermediate representation (IR).  In case of clang it is LLVM IR.  Backend Compiler(LLVM):  Responsibility of backend compiler is to take a IR as input and convert into object code. LLVM input is bitstream of LLVM IR (Bitcode) and output is sequence of machine instruction(Object code). Each  cpu or processor has different set of  M achine   instruction, So  LLVM output is CPU dependent or it can be executed on specific CPU only.   There may be question in your mind that  1) What is the need to divide into these phases? 2) What is LLVM IR? Can we see the LLVM IR as Output? What is the need to divide into these phases? It is beneficial for both the programming language designer a

Animation Animation always capture the user attention. We can use animation to update things on the screen.  For developer also animations fascinated things to learn and implement. Today we will try shake effect with Various  API. CABasicAnimation: Here we animate view's frame y coordinate from one position to another position. It is simple example of changing the position with respect to time. CABasic Animation is deal with the single keyframe.                                        y(t) = y 0 + t*d(y) You can use CABasic Animation if you have to play with single value. You need to move object from  one position to another without any intermediate steps. CABasicAnimation * shakeAnimation = [CABasicAnimation animationWithKeyPath: @ "position" ]; shakeAnimation . duration = 0.05 ; shakeAnimation . autoreverses = YES; shakeAnimation . repeatCount = 6 ; CGPoint shakeFromPoint = CGPointMake( self . shakeLabel . center . x,