ios - 在表格 View 中保存选定的行并返回主屏幕 UIButtons

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Plz code Help 谁能告诉我如何完成这项任务？
在主屏幕中，用户选择足球运动员，在表格 View 单元格的第二个屏幕中，用户选择特定行并保存该行并返回主视图。在主视图中，它会显示特定行的视频。
基本上我想知道特定的行选择，将该选择保存在表格 View 中并在主屏幕中显示他们的内容。

Answer 1

通过下面的代码，它实现了委托(delegate)概念，也实现了你的问题的解决方案希望这对你有帮助:)

  //in your main view controller

  #import "ViewController.h"
  #import "FootBallPlayersViewController.h"

  @interface ViewController ()<FootballPlayerDelegate>//confirms to this delegate 

  @end

  @implementation ViewController

  - (void)viewDidLoad
   {
        [super viewDidLoad];



// Do any additional setup after loading the view, typically from a nib.
   }

 - (IBAction)whenSelectButtonClicked:(id)sender
   {
        FootBallPlayersViewController *controller = [[FootBallPlayersViewController alloc]initWithNibName:@"FootBallPlayersViewController" bundle:nil];
        controller.delegate = self; //u must set to self
        [self presentViewController:controller animated:YES completion:nil];


   }

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

  - (void)selectedFootBallPlayer:(NSString *)player
    {
      //implementation of your delegate method

      //hear u are getting the football player name and u can continue further hear
       NSLog(@"%@",player);
      if([player isEqualToString:@"player1"])
        {
          UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
          [aButton setTitle:player forState:UIControlStateNormal];
          [aButton addTarget:self action:@selector(whenFirstPlayerButtonClicked:) forControlEvents:UIControlEventTouchUpInside]; //add the target to self for click events 
          aButton.frame = CGRectMake(50, 50, 200, 55);
          [self.view addSubview:aButton];

       }
     else
      {
       UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
       [aButton setTitle:player forState:UIControlStateNormal];
       aButton.frame = CGRectMake(50, 105, 200, 55);
        [aButton addTarget:self action:@selector(whenSecondPlayerButtonClicked:) forControlEvents:UIControlEventTouchUpInside]; //same hear
       [self.view addSubview:aButton];

      }


  }
   //now define the action methods 
 - (void)whenFirstPlayerButtonClicked:(UIButton *)sender
  {

       NSLog(@"player 1 video start");    
  }

  - (void)whenSecondPlayerButtonClicked:(UIButton *)sender
  {
       NSLog(@"player 2 video start ");
  }


  @end

在包含 tableview 的 View 中做这样的事情

//在FootBallPlayersViewController.h中

   #import <UIKit/UIKit.h>
     @protocol FootballPlayerDelegate <NSObject>     //define a protocol named      FootballPlayerDelegate
    - (void)selectedFootBallPlayer:(NSString *)player;
    @end

   @interface FootBallPlayersViewController : UIViewController
    {
       NSArray *players;
       NSString *selectedPlayer;
    }

   @property (retain, nonatomic) IBOutlet UITableView *playerTable;
   @property (nonatomic, assign) id<FootballPlayerDelegate>delegate; //create a delegate

   @end

在您的 FootBallPlayersViewController.m文件

   #import "FootBallPlayersViewController.h"

   @interface FootBallPlayersViewController ()<UITableViewDataSource,UITableViewDelegate>
     {


    }
   @end

   @implementation FootBallPlayersViewController
   @synthesize delegate; //synthesizing the delegate

   - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
   {
      self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
      if (self) {
      // Custom initialization
         }
     return self;
    }

    - (void)viewDidLoad
   {
       [super viewDidLoad];
        players = [[NSArray alloc]initWithObjects:@"player1",@"player2", nil];
      // players = [[NSArray alloc]initWithObjects:@"player1","player2", nil];
     // Do any additional setup after loading the view from its nib.
   }

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

   - (void)dealloc
  {
      [players release];
      [_playerTable release];
      [super dealloc];
  }
 - (IBAction)whenDoneButtonClicked:(id)sender {
      //when done button clicked -->
      //send a delegate to main controller
      if([self.delegate respondsToSelector:@selector(selectedFootBallPlayer:)])//to avoid crash
        {
          [self.delegate selectedFootBallPlayer:selectedPlayer]; //call the delegate method hear
        }
     //dismiss the view
     [self dismissViewControllerAnimated:YES completion:nil];

    }


    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
     {
        return 1;
      }

     - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
         return players.count;
    }

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

        UITableViewCell *cell = [tableView dequeueReusableHeaderFooterViewWithIdentifier:@"cell"];
        if(cell == nil)
       {
          cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
       }

        cell.textLabel.text = [players objectAtIndex:indexPath.row];
        return cell;
   }

   - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
   {
      //u can manage check mark and all, i am getting the selected player name
     selectedPlayer = [players objectAtIndex:indexPath.row];
    }

 @end