IOS第12天(2,UINavigationController导航控制器)

****HMAppDelegate.m

@implementation HMAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    
    HMOneViewController *oneVc = [[HMOneViewController alloc] init];
    
    UINavigationController *navVc = [[UINavigationController alloc] initWithRootViewController:oneVc];
    
    
    self.window.rootViewController = navVc;
    
    [self.window makeKeyAndVisible];
    return YES;
}

-(void)test1{
    //1.创建一个导航控制器
    //UINavigationController *navVc = [[UINavigationController alloc] init];
    
    //2.设置导航控制器的子控制器
    UIViewController *oneVc = [[UIViewController alloc] init];
    oneVc.view.backgroundColor  = [UIColor grayColor];
    
    UIViewController *twoVc = [[UIViewController alloc] init];
    twoVc.view.backgroundColor = [UIColor purpleColor];
    
    //method 1 : 添加导航控制器的子控制器
    //[navVc pushViewController:oneVc animated:YES];
    //[navVc pushViewController:twoVc animated:YES];
    
    //method 2
    //navVc.viewControllers = @[oneVc];
    
    
    //method 3
    //    [navVc addChildViewController:oneVc];
    //    [navVc addChildViewController:twoVc];


    //self.window.rootViewController = navVc;

}

******HMOneViewController.m

#import "HMOneViewController.h"
#import "HMTwoViewController.h"

@interface HMOneViewController ()
- (IBAction)jumpTwoVc:(id)sender;

@end

@implementation HMOneViewController

- (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 from its nib.
    //NSLog(@"%@",self.navigationController.viewControllers);
    
    //设置导航栏的内容
    //设置标题
    self.navigationItem.title = @"第一个控制器";
    
    //设置导航栏左边的按钮
    UIBarButtonItem *leftBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
    self.navigationItem.leftBarButtonItem = leftBtn;
    
    //设置下一个控制器的返回按钮
    //当前控制的navigationItem里的返回按钮是决定下一个控制器的返回按钮
    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:nil action:nil];
}

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


//跳到第二个控制器
- (IBAction)jumpTwoVc:(id)sender {
    
    HMTwoViewController *twoVc = [[HMTwoViewController alloc] init];
    
    NSLog(@"%@",self.navigationController);
    [self.navigationController pushViewController:twoVc animated:YES];
}
@end

*******HMTwoViewController.m

#import "HMTwoViewController.h"
#import "HMThreeViewController.h"

@interface HMTwoViewController ()

- (IBAction)backOneVc:(id)sender;

- (IBAction)jumpThreeVc;


@end

@implementation HMTwoViewController

- (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 from its nib.
    //NSLog(@"%@",self.navigationController.viewControllers);
    
    //设置标题
    self.navigationItem.title = @"第二个控制器";
    
    //设置返回按钮
    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"BACK" style:UIBarButtonItemStylePlain target:nil action:nil];
    
    //设置导航栏左边的按钮
    //如果设置leftBarButtonItem ，之前那个返回无效
    UIBarButtonItem *leftBtnItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self  action:@selector(back)];
    self.navigationItem.leftBarButtonItem = leftBtnItem;
    
    //设置导航栏右边的按钮
    UIBarButtonItem *search = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:nil action:nil];
    //self.navigationItem.rightBarButtonItem = search;
    
    UIBarButtonItem *refresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:nil action:nil];
    
    self.navigationItem.rightBarButtonItems = @[search,refresh];
    
}

//返回上一个控制器
-(void)back{
    [self.navigationController popViewControllerAnimated:YES];
}

- (IBAction)backOneVc:(id)sender {
    
    [self.navigationController popViewControllerAnimated:YES];
}

- (IBAction)jumpThreeVc {
    
    //跳到第三个控制器
    HMThreeViewController *threeVc = [[HMThreeViewController alloc] init];
    [self.navigationController pushViewController:threeVc animated:YES];
}
@end

********HMThreeViewController.m

#import "HMThreeViewController.h"

@interface HMThreeViewController ()
- (IBAction)backOneVc:(id)sender;

@end

@implementation HMThreeViewController

- (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 from its nib.
    
    //栈的所有控制器
    NSLog(@"%@",self.navigationController.viewControllers);
    NSArray *array = [self.navigationController childViewControllers];
    NSLog(@"%@",array);
    
    //设置标题View
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeContactAdd];
    
    self.navigationItem.titleView = btn;
    
    //设置返回按钮btn_back_normal
    UIButton  *redBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    redBtn.bounds =  CGRectMake(0, 0, 46, 31);
    [redBtn setBackgroundImage:[UIImage imageNamed:@"btn_back_normal"] forState:UIControlStateNormal];
    
    [redBtn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
    
    UIBarButtonItem *redBackBtnItem = [[UIBarButtonItem alloc] initWithCustomView:redBtn];
    
    self.navigationItem.leftBarButtonItem = redBackBtnItem;
    

}

//返回上一个控制咕噜
-(void)back{

    [self.navigationController popViewControllerAnimated:YES];

}

- (IBAction)backOneVc:(id)sender {
    
    //返回第一个控制器
    //[self.navigationController popToRootViewControllerAnimated:YES];
    //获取第一个控制器
    UIViewController *oneVC = self.navigationController.viewControllers[0];
    //返回指定控制器
    [self.navigationController popToViewController:oneVC animated:YES];
}
@end