iOS开发中导航控制器的基本使用教程

@implementation YYAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
    //1.创建一个导航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.设置导航控制器为window的根视图
    self.window.rootViewController=nav;

   
    //3.添加子控制器到导航控制器中
    //创建一些控制器
    UIViewController *c1=[[UIViewController alloc]init];
    //设置c1这个控制器的视图颜色
    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];
   
//把这些控制器添加到导航控制器中
    [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.创建一个导航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.设置导航控制器为window的根视图
    self.window.rootViewController=nav;

   
    //3.添加子控制器到导航控制器中
    YYOneViewController *one=[[YYOneViewController alloc]init];
    [nav pushViewController:one animated:YES];
   
    [self.window makeKeyAndVisible];
    return YES;
   
   
//    //创建一些控制器
//    UIViewController *c1=[[UIViewController alloc]init];
//    //设置c1这个控制器的视图颜色
//    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];
//   
////把这些控制器添加到导航控制器中
//    [nav pushViewController:c1 animated:YES];
//    [nav pushViewController:c2 animated:YES];
//    [nav pushViewController:c3 animated:YES];
}

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

@interface YYOneViewController ()
/**
 跳转到第二个界面
 */
- (IBAction)jump2two:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //1.创建第二个子控制器
    YYTwoViewController *two=[[YYTwoViewController alloc]init];
   
    //2.把子控制器添加到导航控制器中
    //有什么办法能够拿到导航控制器？
     //只要当前控制器是导航控制器的子控制器，那么就可以通过该属性直接获取到当前控制器所在的导航控制器
    [self.navigationController pushViewController:two animated:YES];
}
@end

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

@end

//跳转到第三个子控制器
- (IBAction)jump2Three:(id)sender {
    //1.创建第三个子控制器
    YYThreeViewController *three=[[YYThreeViewController alloc]init];
    //2.将子控制器添加到导航控制器中
    [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

//应用程序启动完毕即会调用
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
   
    //3.添加子控制器到导航控制器中
    //第一种也是最常用的一种
//    YYOneViewController *one=[[YYOneViewController alloc]init];
//    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:one];
   
    //1.创建一个导航控制器
    UINavigationController *nav=[[UINavigationController alloc]init];
    //2.设置导航控制器为window的根视图
    self.window.rootViewController=nav;
   
    //第二种
    YYOneViewController  *one = [[YYOneViewController  alloc] init];
    [nav pushViewController:one animated:YES];
   
    //第三种
//    [nav addChildViewController:one];
//    第四种(添加到导航控制器的栈中)
//    nav.viewControllers=@[one];
   
    // 导航控制器的栈
    //    nav.viewControllers;== nav.childViewControllers;
    // 注意该属性是只读的，因此不能像下面这样写
    //    nav.childViewControllers = @[one];
   
   
    [self.window makeKeyAndVisible];
    return YES;
}

@end

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

@interface YYOneViewController ()
/**
 跳转到第二个界面
 */
- (IBAction)jump2two:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //1.创建第二个子控制器
    YYTwoViewController *two=[[YYTwoViewController alloc]init];
   
    //2.把子控制器添加到导航控制器中
    //有什么办法能够拿到导航控制器？
     //只要当前控制器是导航控制器的子控制器，那么就可以通过该属性直接获取到当前控制器所在的导航控制器
    [self.navigationController pushViewController:two animated:YES];
}

-(void)viewDidLoad
{
    [super viewDidLoad];
    //控制当前控制器对应的导航条显示的内容
    self.navigationItem.title=@"第一个界面";
    //修改返回按钮显示的内容
    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

//跳转到第三个子控制器
- (IBAction)jump2Three:(id)sender {
    //1.创建第三个子控制器
    YYThreeViewController *three=[[YYThreeViewController alloc]init];
    //2.将子控制器添加到导航控制器中
    [self.navigationController pushViewController:three animated:YES];
}

-(void)viewDidLoad
{
    [super viewDidLoad];
    //给导航栏添加按钮
    //添加导航栏左边的按钮(添加一个相机图标的按钮),会盖掉返回
//    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
   
    //为导航栏在右边添加多个按钮
    //创建两个按钮
    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];
   
    //设置对应的导航条的返回（第三个界面导航条的返回）
    self.navigationItem.backBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleBordered target:nil action:nil];
}
@end

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

@interface YYThreeViewController ()
//返回到第二个控制器页面
- (IBAction)jump2two:(id)sender;
//返回到第一个控制器页面
- (IBAction)jump2root:(id)sender;

@end

- (IBAction)jump2two:(id)sender {
    //跳转到第二个界面(移除当前栈顶的控制器)
    [self.navigationController popViewControllerAnimated:YES];
}

- (IBAction)jump2root:(id)sender {
    //移除处理栈底控制器之外的所有控制器
    [self.navigationController popToRootViewControllerAnimated:YES];
   
    // 只要传入栈中的某一个控制器,就会跳转到指定控制器
       //不能这样，没添加到导航控制器YYTwoViewController *two = [[YYTwoViewController  alloc] init];
    //[self.navigationController popToViewController:<#(UIViewController *)#> animated:<#(BOOL)#>];
}
@end

/**
 *  返回传入veiw的所有层级结构
 *
 *  @param view 需要获取层级结构的view
 *
 *  @return 字符串
 */
- (NSString *)digView:(UIView *)view
{
    if ([view isKindOfClass:[UITableViewCell class]]) return @"";
    // 1.初始化
    NSMutableString *xml = [NSMutableString string];
   
    // 2.标签开头
    [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.判断是否要结束
    if (view.subviews.count == 0) {
        [xml appendString:@" />"];
        return xml;
    } else {
        [xml appendString:@">"];
    }
   
    // 4.遍历所有的子控件
    for (UIView *child in view.subviews) {
        NSString *childXml = [self digView:child];
        [xml appendString:childXml];
    }
   
    // 5.标签结尾
    [xml appendFormat:@"</%@>", view.class];
   
    return xml;
}