#import <UIKit/UIKit.h>

#import "FirstViewController.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    FirstViewController *first=[[FirstViewController alloc]init];

    UINavigationController *navc=[[UINavigationController alloc]initWithRootViewController:first];

    self.window.rootViewController=navc;

    return YES;

}

#import <UIKit/UIKit.h>

#import "SecondViewController.h"

@interface FirstViewController : UIViewController<UITableViewDataSource,UITableViewDelegate,postValueDelegate>

@property(strong,nonatomic)UITableView * tableview;

@property(strong,nonatomic)NSMutableArray *array;

@property(strong,nonatomic)NSString *st;

@end

#import "FirstViewController.h"

@interface FirstViewController ()

@property(assign,nonatomic)int a;

@end

@implementation FirstViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor=[UIColor yellowColor];

    self.title=@"首页";

    UIBarButtonItem *nextItem=[[UIBarButtonItem alloc]initWithTitle:@"下一页" style:UIBarButtonItemStylePlain target:self action:@selector(nextpage)];

    self.navigationItem.rightBarButtonItem=nextItem;

    self.array=[NSMutableArray array];

    for (int i=1; i<20; i++) {

        [self.array addObject:[NSString stringWithFormat:@"你摔了%d跤",i]];

    }

    self.tableview=[[UITableView alloc]initWithFrame:self.view.frame style:1];

    self.tableview.separatorColor=[UIColor redColor];

    self.tableview.delegate=self;

    self.tableview.dataSource=self;

    [self.view addSubview:self.tableview];

    [self.tableview registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];

}

-(void)postvalue:(NSString *)str

{

//    self.st=str;

    [self.array replaceObjectAtIndex:self.a withObject:str];

    [self.tableview reloadData];

//    NSLog(@"%@",self.st);

}

#pragma mark 数据源  每个分区显示行数设置

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return self.array.count;

}

#pragma mark 数据源  每个单元格显示的内容

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    //单元格重用机制

    static NSString * cellIdentity=@"cell";

    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIdentity forIndexPath:indexPath];

    cell.textLabel.text=self.array[indexPath.row];

    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    NSLog(@"%@",self.array[indexPath.row]);

    self.st=self.array[indexPath.row];

    SecondViewController *second=[[SecondViewController alloc]init];

     second.str=self.st;

    second.delegate=self;

    self.a=(int)indexPath.row;

    NSLog(@"%d",self.a);

    [self.navigationController pushViewController:second animated:YES];

}

-(void)nextpage

{

    SecondViewController *second=[[SecondViewController alloc]init];

    second.str=self.st;

    [self.navigationController pushViewController:second animated:YES];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    // Get the new view controller using [segue destinationViewController].

    // Pass the selected object to the new view controller.

}

*/

@end

#import <UIKit/UIKit.h>

//创建协议，声明方法

@protocol postValueDelegate <NSObject>

-(void)postvalue:(NSString* )str;

@end

@interface SecondViewController : UIViewController<UITextFieldDelegate>

@property(strong,nonatomic) UITextField  * textName;

@property(strong,nonatomic) NSString *str;

@property(strong,nonatomic) id<postValueDelegate> delegate;

@end

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor=[UIColor greenColor];

    self.navigationItem.hidesBackButton=YES;

    self.title=@"尾页";

    self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithTitle:@"back" style:2 target:self action:@selector(backpage)];

    self.textName=[[UITextField alloc]initWithFrame:CGRectMake(100, 300, 150, 60)];

    self.textName.borderStyle=1;

    self.textName.text=self.str;

    self.textName.delegate=self;

    [self.view addSubview:self.textName];

}

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

    if ([textField isFirstResponder]) {

        [textField resignFirstResponder];

    }

    if (self.delegate) {

        [self.delegate postvalue:self.textName.text];

    }

    [self.navigationController popToRootViewControllerAnimated:YES];

    return YES;

}

-(void)backpage

{

    if (self.delegate) {

        [self.delegate postvalue:self.textName.text];

        NSLog(@"%@",self.textName.text);

    }

    [self.navigationController popToRootViewControllerAnimated:YES];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    // Get the new view controller using [segue destinationViewController].

    // Pass the selected object to the new view controller.

}

*/

@end