页面传值的问题---页面生命周期

我这么传值

-(void)skipToWriteDiary:(id)sender
{
    UIButton * tmp = (UIButton *)sender;
    NSInteger index = tmp.tag - fTag;
    DiaryViewController * diaryViewController = [[DiaryViewController alloc]initWithNibName:nil bundle:nil];
    diaryViewController.week = index;
    [self.navigationController pushViewController:diaryViewController animated:YES];
}

@interface DiaryViewController : UIViewController

@property (nonatomic,assign)NSInteger  week;

@end

控制台输出

2014-03-13 11:53:40.524 SIMS[1230:11303] viewDidLoad---------0

2014-03-13 11:53:40.526 SIMS[1230:11303] viewWillAppear---------3

2014-03-13 11:53:40.879 SIMS[1230:11303] viewDidAppear---------3

2014-03-13 11:53:40.524 SIMS[1230:11303] viewDidLoad---------0

2014-03-13 11:53:40.526 SIMS[1230:11303] viewWillAppear---------3

2014-03-13 11:53:40.879 SIMS[1230:11303] viewDidAppear---------3