Snail—UI学习之自定义导航栏NSNavigationController

首先新建一个RootViewController 再建一个FirstViewController

在RootViewController.m中写入

#import "WJJRootViewController.h"
#import "WJJFirstViewController.h"

@interface WJJRootViewController ()

@end

@implementation WJJRootViewController

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

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor grayColor];
[self createMyNavigationBar];
}

- (void)createMyNavigationBar{
//手机最上面的状态栏20像素 系统导航栏高度为44 所以一共64像素
UIView * navigationBar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 64)];
navigationBar.backgroundColor = [UIColor redColor];
[self.view addSubview:navigationBar];

//定义一个按钮
UIButton * pushButton = [UIButton buttonWithType:UIButtonTypeSystem];
pushButton.frame = CGRectMake(self.view.frame.size.width- 10 - 50, 27, 50, 30);
[pushButton setTitle:@"下一页" forState:UIControlStateNormal];
[pushButton addTarget:self action:@selector(nextPage) forControlEvents:UIControlEventTouchUpInside];
//把按钮放在自定义的导航栏上
[navigationBar addSubview:pushButton];
}

- (void)nextPage{
WJJFirstViewController * first = [[WJJFirstViewController alloc] init];
[self.navigationController pushViewController:first animated:YES];
}

- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//因为后面的界面有可能使用系统导航栏 会把此属性设置为NO不隐藏 所以有必要在这设置一下 以防万一
self.navigationController.navigationBarHidden = YES;
}

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

@end


然后 在firstViewController.m 中写入
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor blackColor];
}

- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//设置系统导航栏不隐藏 使用系统导航栏
self.navigationController.navigationBarHidden = NO;
}