我是小小的搬运工

#import //Public: is available an accessible from anywhere //Protected: is available only to subclasses //Private: is available to the class only //Package: is available from that p

#import void quicksortInPlace(NSMutableArray *array, NSInteger first, NSInteger last, NSComparator comparator) {     if (first >= last) return;     id pivot = array[(first + last) / 2];  

iOS程序猿，一定见过下面这道面试题：@implementation Son : Father - (id)init { self = [super init]; if (self) { NSLog(@"%@", NSStringFromClass([self class])); NSLog(@"%@", NSStr