Ios UINavigationController继承，视图将显示为未调用

我创建了一个子类Inherit from UINavigationController，我的所有导航控制器都继承自该类，当应用程序运行时，viewDidLoad从我的类中调用，但ViewWillDisplay不调用任何人知道吗？ 正在添加子类ViewWill时将显示：

    //********************************************************************************************    
    //**  viewWillAppear                                                                                     
    //*********************************************************************************************

- (void) viewWillAppear:(BOOL)animated{
   [super viewWillAppear:animated];
   [self replacePng];
   self.title = @"";
}

这是一节课：

//
//  MyViewController.m
//  Nifgashim
//
//  Created by shim wi on 7/15/14.
//  Copyright (c) 2014 Oded. All rights reserved.
//

#import "MyViewController.h"

@interface MyViewController ()

@end

@implementation MyViewController
@synthesize interstitial;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
sing = [singData sharedInstance];
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
    //********************************************************************************************     ******
 //**  viewWillAppear                                                                                   *
    //**************************************************************************************************
- (void) viewWillAppear:(BOOL)animated{
    if (sing.adInt == sing.adCount)
    {
        [self loadInterstitial];
    }
    else{
        sing.adCount++;
    }
    [super viewWillAppear:animated];

}

#pragma mark GADRequest implementation
//*********************************************************
//* GADRequest implementation                             *
//*********************************************************

- (GADRequest *)request {
    GADRequest *request = [GADRequest request];

    return request;
}
#pragma mark GADInterstitialDelegate implementation
//*********************************************************
//* interstitialDidReceiveAd                              *
//*********************************************************

- (void)interstitialDidReceiveAd:(GADInterstitial *)interstitial {
    [self.interstitial presentFromRootViewController:self];
}
#pragma mark didFailToReceiveAdWithError implementation
//*********************************************************
//* didFailToReceiveAdWithError                           *
//*********************************************************

- (void)interstitial:(GADInterstitial *)interstitial
didFailToReceiveAdWithError:(GADRequestError *)error {
}
//*********************************************************
//* loadInterstitial                                      *
//*********************************************************

-(void)loadInterstitial{
    self.interstitial = [[GADInterstitial alloc] init];
    self.interstitial.delegate = self;

   self.interstitial.adUnitID = MY_BANNER_UNIT_ID;
    [self.interstitial loadRequest:[self request]];
  }/*
    #pragma mark - Navigation

  // In a storyboard-based application, you will often want to do a little preparation     before navigation
  - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
  {
  // Get the new view controller using [segue destinationViewController].
  // Pass the selected object to the new view controller.
  }
  */

@end

---

对于

MyViewController

的子类，您在

viewwillbeen

中有什么内容？我在基类的顶部添加了函数，这样您就可以看到，您是否已通过断点确认没有调用子类

viewwillbeen

？子类viewwillbeen被调用，但基类没有被调用，当您单步通过子类中的

viewwillbeen

时，将调用基类的ViewDidLoad，当它到达

[super viewwillbeen]

时会发生什么？或许我很困惑。当你说subclass时，你是指

MyViewController

类还是最后一个子类？您可以显示最终的子类声明吗