#import "YYAppDelegate.h"
#import "YYViewController.h"

@implementation YYAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //1.创建window，并设置window的frame
    self.window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
    //2.设置window的背景颜色为黑色
    self.window.backgroundColor=[UIColor blackColor];

   
    //创建一个导航控制器作为子控制器
    YYViewController *one=[[YYViewController alloc]init];
    self.window.rootViewController=one;
   
    //3.设置window为主窗口，并显示
    [self.window makeKeyAndVisible];
    return YES;
}

@end

#import "YYViewController.h"
#import "YYtwoViewController.h"

@interface YYViewController ()
//当点击的时候，跳转到第二个界面
- (IBAction)jump2two:(UIButton *)sender;

@end

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (IBAction)jump2two:(UIButton *)sender {
    //创建一个新的modal并弹出
    YYtwoViewController *two=[[YYtwoViewController alloc]init];
    //在two上用导航控制器包装，让弹出的模态窗口有一个导航栏可以放返回按钮
    UINavigationController *nvc=[[UINavigationController alloc]initWithRootViewController:two
                                 ];
    [self presentViewController:nvc animated:YES completion:^{
        NSLog(@"弹出一个模态窗口");
    }];
   
}
@end

#import "YYtwoViewController.h"

@interface YYtwoViewController ()

@end

- (void)viewDidLoad
{
    [super viewDidLoad];

    //给导航条添加一个返回按钮
    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(change)];
}

-(void)change
{
    //编写点击返回按钮的点击事件
    //点击返回按钮，移除当前模态窗口
//    [self.navigationController dismissViewControllerAnimated:YES completion:^{
//        NSLog(@"移除模态窗口");
//    }];
   
// 如果一个控制器是以模态的形式展现出来的, 可以调用该控制器以及该控制器的子控制器让让控制器消失
    [self dismissViewControllerAnimated:YES completion:^{
        NSLog(@"移除");
    }];
}

@end

#import "YYViewController.h"
#import "YYtwoViewController.h"

@interface YYViewController ()

@end

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

/*
 如果控制器之间的关系比较紧密一般用 UINavigationController
 如果控制器之间的关系不是很紧密可以用Modal
 */

//通过segue跳转前，会调用这个方法，在这个方法中把数据传递给弹出来的模态窗口
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    //拿到目标控制器
    UINavigationController *nav=segue.destinationViewController;
    YYtwoViewController *two=(YYtwoViewController *)nav.topViewController;
    //传递数据
    two.name=@"文顶顶";
}
@end

#import <UIKit/UIKit.h>

@interface YYtwoViewController : UIViewController
@property(nonatomic,copy)NSString *name;
@end

YYtwoViewController.m文件

//
//  YYtwoViewController.m
//  02-模态窗口的数据传递
//
//  Created by apple on 14-6-9.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

#import "YYtwoViewController.h"

@interface YYtwoViewController ()
@property (weak, nonatomic) IBOutlet UILabel *nametext;

@end

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.nametext.text=self.name;
   
    //为导航栏添加一个返回按钮
    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(black)];
}

-(void)black
{
    //移除模态窗口
    [self dismissViewControllerAnimated:YES completion:^{
        NSLog(@"成功移除！");
    }];
}
@end