Initialize and load

/**load * When a class is loaded into the OC Runtime (memory), it is called once *//**initialize * * When the class is first used

#import   "Person.h" @implementation  Person+  (void) Load{    nslog (@ "---------- --person load--------------");} +  (void) Initialize{    nslog (@ "------------person initialize--------------");} #import   "Child.h" @implementation  Child+  (void) Load{    nslog (@ "------------ Child load--------------");} +  (void) Initialize{    nslog (@ "------------child initialize--------------");} #import   "ViewController.h" #import   "Person.h" #import   "Child.h" @interface  viewcontroller   () @end @implementation viewcontroller-  (void) viewdidload {    [super  viewDidLoad];        //Person *p = [[Person  alloc] init];    child *c = [[child alloc] init];     } output result 2015-07-19 17:05:59.735 test[27283:1314612] ------------person load--------------2015-07-19 17:05:59.739 test[27283:1314612]  ------------child load--------------2015-07-19 17:05:59.928 test[27283:1314612] ---- --------person initialize--------------2015-07-19 17:13:05.182 test[27396:1319499] ------- -----child initialize--------------

Initialize and load