base sdk missing error in iphone coding

Base sdk missing error in iphone coding, how to solve it. see below 1/first screen shots.

SOLUTION (Just close your eye for 2 minutes.):

Step1: project(menu) -> Edit Project Settings->Build->Base Sdk-> (select) Latest ios (currently set to …)  see below 3/all three screen shots.

 

 

 

Step2: (select) Release ->(select) Simulator   done, see below 2/all two screen shots.

 

 

 

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