OC高效率52不要使用retainCount

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
/**
*  ARC已经废弃次方法
*  它所返回的保留计数只是某个给定时间点上的值
*/
//-(NSUInteger)retainCount;

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end