SecondViewController有个label控件

- (IBAction)click:(id)sender {
   //SecondViewController  有个label控件
   SecondViewController *vc = [[SecondViewController alloc]initWithNibName:@"SecondViewController" bundle:[NSBundle mainBundle]];
   [self.navigationController pushViewController:vc animated:YES];
   NSLog(@"%@",vc.label);//1
   NSLog(@"view%@",vc.view);//2
   NSLog(@"sdf%@", vc.label);//3
}

第1种情况输出nil 调用顺序为 NSlog->viewDidLoad
第2、3种情况正常输出 调用顺序为 viewDidLoad->NSLog2->NSLog3

Ps:就写这么多吧