@implementation YYAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
    //1.創(chuàng)建一個(gè)導(dǎo)航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.設(shè)置導(dǎo)航控制器為window的根視圖
    self.window.rootViewController=nav;

   
    //3.添加子控制器到導(dǎo)航控制器中
    //創(chuàng)建一些控制器
    UIViewController *c1=[[UIViewController alloc]init];
    //設(shè)置c1這個(gè)控制器的視圖顏色
    c1.view.backgroundColor=[UIColor redColor];
   
    UIViewController *c2=[[UIViewController alloc]init];
    c2.view.backgroundColor=[UIColor purpleColor];
   
    UIViewController *c3=[[UIViewController alloc]init];
    c3.view.backgroundColor=[UIColor brownColor];
   
//把這些控制器添加到導(dǎo)航控制器中
    [nav pushViewController:c1 animated:YES];
    [nav pushViewController:c2 animated:YES];
    [nav pushViewController:c3 animated:YES];
   
    [self.window makeKeyAndVisible];
    return YES;
}

#import "YYAppDelegate.h"
#import "YYOneViewController.h"

@implementation YYAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
    //1.創(chuàng)建一個(gè)導(dǎo)航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.設(shè)置導(dǎo)航控制器為window的根視圖
    self.window.rootViewController=nav;

   
    //3.添加子控制器到導(dǎo)航控制器中
    YYOneViewController *one=[[YYOneViewController alloc]init];
    [nav pushViewController:one animated:YES];
   
    [self.window makeKeyAndVisible];
    return YES;
   
   
//    //創(chuàng)建一些控制器
//    UIViewController *c1=[[UIViewController alloc]init];
//    //設(shè)置c1這個(gè)控制器的視圖顏色
//    c1.view.backgroundColor=[UIColor redColor];
//   
//    UIViewController *c2=[[UIViewController alloc]init];
//    c2.view.backgroundColor=[UIColor purpleColor];
//   
//    UIViewController *c3=[[UIViewController alloc]init];
//    c3.view.backgroundColor=[UIColor brownColor];
//   
////把這些控制器添加到導(dǎo)航控制器中
//    [nav pushViewController:c1 animated:YES];
//    [nav pushViewController:c2 animated:YES];
//    [nav pushViewController:c3 animated:YES];
}

#import "YYOneViewController.h"
#import "YYTwoViewController.h"

@interface YYOneViewController ()
/**
 跳轉(zhuǎn)到第二個(gè)界面
 */
- (IBAction)jump2two:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //1.創(chuàng)建第二個(gè)子控制器
    YYTwoViewController *two=[[YYTwoViewController alloc]init];
   
    //2.把子控制器添加到導(dǎo)航控制器中
    //有什么辦法能夠拿到導(dǎo)航控制器？
     //只要當(dāng)前控制器是導(dǎo)航控制器的子控制器，那么就可以通過該屬性直接獲取到當(dāng)前控制器所在的導(dǎo)航控制器
    [self.navigationController pushViewController:two animated:YES];
}
@end

#import "YYTwoViewController.h"
#import "YYThreeViewController.h"
@interface YYTwoViewController ()
- (IBAction)jump2Three:(id)sender;

@end

//跳轉(zhuǎn)到第三個(gè)子控制器
- (IBAction)jump2Three:(id)sender {
    //1.創(chuàng)建第三個(gè)子控制器
    YYThreeViewController *three=[[YYThreeViewController alloc]init];
    //2.將子控制器添加到導(dǎo)航控制器中
    [self.navigationController pushViewController:three animated:YES];
   
}
@end

    UINavigationController *nav=[[UINavigationControlleralloc]init];

    self.window.rootViewController=nav;

    YYOneViewController  *one = [[YYOneViewController  alloc] init];

    [nav pushViewController:one animated:YES];

 [nav addChildViewController:one];

nav.viewControllers=@[one];

 UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:one];

    self.navigationItem.backBarButtonItem=[[UIBarButtonItemalloc]initWithTitle:@"返回一" style:UIBarButtonItemStylePlain target:nilaction:nil];

#import "YYAppDelegate.h"
#import "YYOneViewController.h"

@implementation YYAppDelegate

//應(yīng)用程序啟動(dòng)完畢即會(huì)調(diào)用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
   
    //3.添加子控制器到導(dǎo)航控制器中
    //第一種也是最常用的一種
//    YYOneViewController *one=[[YYOneViewController alloc]init];
//    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:one];
   
    //1.創(chuàng)建一個(gè)導(dǎo)航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.設(shè)置導(dǎo)航控制器為window的根視圖
    self.window.rootViewController=nav;
   
    //第二種
    YYOneViewController  *one = [[YYOneViewController  alloc] init];
    [nav pushViewController:one animated:YES];
   
    //第三種
//    [nav addChildViewController:one];
//    第四種(添加到導(dǎo)航控制器的棧中)
//    nav.viewControllers=@[one];
   
    // 導(dǎo)航控制器的棧
    //    nav.viewControllers;== nav.childViewControllers;
    // 注意該屬性是只讀的，因此不能像下面這樣寫
    //    nav.childViewControllers = @[one];
   
   
    [self.window makeKeyAndVisible];
    return YES;
}

@end

#import "YYOneViewController.h"
#import "YYTwoViewController.h"

@interface YYOneViewController ()
/**
 跳轉(zhuǎn)到第二個(gè)界面
 */
- (IBAction)jump2two:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //1.創(chuàng)建第二個(gè)子控制器
    YYTwoViewController *two=[[YYTwoViewController alloc]init];
   
    //2.把子控制器添加到導(dǎo)航控制器中
    //有什么辦法能夠拿到導(dǎo)航控制器？
     //只要當(dāng)前控制器是導(dǎo)航控制器的子控制器，那么就可以通過該屬性直接獲取到當(dāng)前控制器所在的導(dǎo)航控制器
    [self.navigationController pushViewController:two animated:YES];
}

-(void)viewDidLoad
{
    [super viewDidLoad];
    //控制當(dāng)前控制器對(duì)應(yīng)的導(dǎo)航條顯示的內(nèi)容
    self.navigationItem.title=@"第一個(gè)界面";
    //修改返回按鈕顯示的內(nèi)容
    self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"返回一" style:UIBarButtonItemStylePlain target:nil action:nil];
}
@end

#import "YYTwoViewController.h"
#import "YYThreeViewController.h"
@interface YYTwoViewController ()
- (IBAction)jump2Three:(id)sender;

@end

//跳轉(zhuǎn)到第三個(gè)子控制器
- (IBAction)jump2Three:(id)sender {
    //1.創(chuàng)建第三個(gè)子控制器
    YYThreeViewController *three=[[YYThreeViewController alloc]init];
    //2.將子控制器添加到導(dǎo)航控制器中
    [self.navigationController pushViewController:three animated:YES];
}

-(void)viewDidLoad
{
    [super viewDidLoad];
    //給導(dǎo)航欄添加按鈕
    //添加導(dǎo)航欄左邊的按鈕(添加一個(gè)相機(jī)圖標(biāo)的按鈕),會(huì)蓋掉返回
//    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
   
    //為導(dǎo)航欄在右邊添加多個(gè)按鈕
    //創(chuàng)建兩個(gè)按鈕
    UIBarButtonItem *a=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemStop target:nil action:nil];
    UIBarButtonItem *b=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:nil action:nil];
    UIBarButtonItem *c=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
    self.navigationItem.rightBarButtonItems=@[a,b,c];
   
    //設(shè)置對(duì)應(yīng)的導(dǎo)航條的返回（第三個(gè)界面導(dǎo)航條的返回）
    self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleBordered target:nil action:nil];
}
@end

#import "YYThreeViewController.h"
#import "YYTwoViewController.h"

@interface YYThreeViewController ()
//返回到第二個(gè)控制器頁面
- (IBAction)jump2two:(id)sender;
//返回到第一個(gè)控制器頁面
- (IBAction)jump2root:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //跳轉(zhuǎn)到第二個(gè)界面(移除當(dāng)前棧頂?shù)目刂破?
    [self.navigationController popViewControllerAnimated:YES];
}

- (IBAction)jump2root:(id)sender {
    //移除處理?xiàng)５卓刂破髦獾乃锌刂破?br />     [self.navigationController popToRootViewControllerAnimated:YES];
   
    // 只要傳入棧中的某一個(gè)控制器,就會(huì)跳轉(zhuǎn)到指定控制器
       //不能這樣，沒添加到導(dǎo)航控制器YYTwoViewController *two = [[YYTwoViewController  alloc] init];
    //[self.navigationController popToViewController:<#(UIViewController *)#> animated:<#(BOOL)#>];
}
@end

/**
 *  返回傳入veiw的所有層級(jí)結(jié)構(gòu)
 *
 *  @param view 需要獲取層級(jí)結(jié)構(gòu)的view
 *
 *  @return 字符串
 */
- (NSString *)digView:(UIView *)view
{
    if ([view isKindOfClass:[UITableViewCell class]]) return @"";
    // 1.初始化
    NSMutableString *xml = [NSMutableString string];
   
    // 2.標(biāo)簽開頭
    [xml appendFormat:@"<%@ frame=\"%@\"", view.class, NSStringFromCGRect(view.frame)];
    if (!CGPointEqualToPoint(view.bounds.origin, CGPointZero)) {
        [xml appendFormat:@" bounds=\"%@\"", NSStringFromCGRect(view.bounds)];
    }
   
    if ([view isKindOfClass:[UIScrollView class]]) {
        UIScrollView *scroll = (UIScrollView *)view;
        if (!UIEdgeInsetsEqualToEdgeInsets(UIEdgeInsetsZero, scroll.contentInset)) {
            [xml appendFormat:@" contentInset=\"%@\"", NSStringFromUIEdgeInsets(scroll.contentInset)];
        }
    }
   
    // 3.判斷是否要結(jié)束
    if (view.subviews.count == 0) {
        [xml appendString:@" />"];
        return xml;
    } else {
        [xml appendString:@">"];
    }
   
    // 4.遍歷所有的子控件
    for (UIView *child in view.subviews) {
        NSString *childXml = [self digView:child];
        [xml appendString:childXml];
    }
   
    // 5.標(biāo)簽結(jié)尾
    [xml appendFormat:@"</%@>", view.class];
   
    return xml;
}