系统方式：

    //1.设置导航栏背景图片[self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];self.navigationController.navigationBar.shadowImage = [[UIImage alloc]init];[[self navigationController] setNavigationBarHidden:NO animated:YES];self.navigationController.navigationBar.backgroundColor = [[UIColor alloc] initWithRed:248/255.0 green:248/255.0 blue:248/255.0 alpha:1.0];//2.导航面板左边的取消按钮UIButton* cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];if(cancelButton != nil){[cancelButton setTitle:POST_CANCEL_BUTTON forState: UIControlStateNormal];[cancelButton setFrame:CGRectMake(0, 0, WIDTH_SCREEN/5.0, 44)];[cancelButton setTitleColor:[[UIColor alloc] initWithRed:0 green:158/255.0 blue:150/255.0 alpha:1.0]forState:UIControlStateNormal];cancelButton.titleLabel.font            = [UIFont systemFontOfSize: 16.0];cancelButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;[cancelButton addTarget:self action:@selector(cancelButtonEventTouchUpInside)forControlEvents :UIControlEventTouchUpInside];UIBarButtonItem *leftItem = [[UIBarButtonItem alloc] initWithCustomView:cancelButton];if(leftItem != nil){self.navigationItem.leftBarButtonItem = leftItem;}}//3.导航面板右边的公布按钮UIButton* postButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];if (postButton != nil){[postButton setFrame:CGRectMake(0, 0, WIDTH_SCREEN/5.0, 44)];[postButton setTitle:@"公布" forState:UIControlStateNormal];[postButton setTitleColor:[[UIColor alloc] initWithRed:0 green:158/255.0 blue:150/255.0 alpha:1.0]forState:UIControlStateNormal];postButton.titleLabel.font            = [UIFont systemFontOfSize: 16.0];postButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;[postButton addTarget:self action:@selector(postButtonEventTouchUpInside)forControlEvents :UIControlEventTouchUpInside];UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithCustomView:postButton];if(rightItem != nil){self.navigationItem.rightBarButtonItem = rightItem;}}//4.导航面板中部文字UILabel* navigationLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0, 44)];if (navigationLabel != nil){[navigationLabel setTextColor:[UIColor blackColor]];navigationLabel.text = POST_NAVIGATION_TITLE;[navigationLabel setTextAlignment:NSTextAlignmentCenter];navigationLabel.font = [UIFont systemFontOfSize:18.0];self.navigationItem.titleView = navigationLabel;}//5.导航以下的一条切割线UIView* line = [[UIView alloc]initWithFrame:CGRectMake(0, 20 + 44,WIDTH_SCREEN, 1)];if (line != nil){line.backgroundColor = [[UIColor alloc] initWithRed:221/255.0 green:221/255.0 blue:221/255.0 alpha:1.0];[self.view addSubview:line];}

自己定义：

    //1.创建导航栏视图UIView *navView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, WIDTH_SCREEN, 65)];if (navView != nil)//当导航视图没有载入成功的时候推出该方法{//1.为导航视图设置背景navView.backgroundColor = [UIColor colorWithRed:248 / 255.0 green:248 / 255.0 blue:248 / 255.0 alpha:1];[[self navigationController] setNavigationBarHidden:YES animated:YES];//2.导航面板左边的取消按钮UIButton* leftButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];if (leftButton != nil){leftButton.frame = CGRectMake(15, 20, 65, 44);[leftButton setTitle:POST_CANCEL_BUTTON forState: UIControlStateNormal];[leftButton setTitleColor:[[UIColor alloc] initWithRed:0 green:158/255.0 blue:150/255.0 alpha:1.0]forState:UIControlStateNormal];leftButton.titleLabel.font            = [UIFont systemFontOfSize: 16.0];leftButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;[leftButton addTarget:self action:@selector(cancelButtonEventTouchUpInside)forControlEvents :UIControlEventTouchUpInside];[navView addSubview:leftButton];}//3.导航面板右边的公布按钮UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];if (rightButton != nil){[rightButton setFrame:CGRectMake(WIDTH_SCREEN - 80, 20, 65, 44)];[rightButton setTitle:@"公布" forState:UIControlStateNormal];[rightButton setTitleColor:[[UIColor alloc] initWithRed:0 green:158/255.0 blue:150/255.0 alpha:1.0]forState:UIControlStateNormal];rightButton.titleLabel.font            = [UIFont systemFontOfSize: 16.0];rightButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;[rightButton addTarget:self action:@selector(postButtonEventTouchUpInside)forControlEvents :UIControlEventTouchUpInside];[navView addSubview:rightButton];}//4.导航面板中部文字UILabel* navTitle = [[UILabel alloc] initWithFrame:CGRectMake(80, 20, WIDTH_SCREEN - 80 - 80, 44)];if (navTitle != nil){[navTitle setTextColor:[UIColor blackColor]];navTitle.text = POST_NAVIGATION_TITLE;[navTitle setTextAlignment:NSTextAlignmentCenter];navTitle.font = [UIFont systemFontOfSize:18.0];[navView addSubview:navTitle];}//5.在导航视图底加入切割线UIView *navDividingLine = [[UIView alloc] init];if (navDividingLine != nil){navDividingLine.frame = CGRectMake(0, 20 + 44, WIDTH_SCREEN, 1);navDividingLine.backgroundColor = [UIColor colorWithRed:221 / 255.0 green:221 / 255.0 blue:221 / 255.0 alpha:1];[navView addSubview:navDividingLine];}//6.往view添加导航栏[self.view addSubview:navView];}