main - iOS - global variable to measure launch time -

In the main function of my app, type me the current CFAbsoluteTime , so that I get it from applicationDidFinishLaunching < / Code> in the current time so that I can measure the launch time. My question is, will I include this code in the following code, and where will I place the global variable?

  int main (int argc, char * argv []) {@autoreleasepool {refund UIApplicationMain (argc, argv, zero, NSStringFromClass ([AppDelegate class])); }}    
 
 
 There is no such answer as a suggestion ... did you try Is it putting a line right above the return? Some {@autoreleasepool {timevariable = [CFAbsoluteTime currentTime] in the lines of  
  int main (int argc, char * argv []); // whatever function call returned, UIApplicationMain (argc, argv, zero, NSStringFromClass ([AppDelegate class])); }}   
 or even by using only NSLog and then subtracting yourself