如何保存和加载添加的播放器名称

Question

我已经搜索并搜索了如何在应用启动或离开视图后将添加的玩家名称保存并加载到tableview，但我什么都没发现。

希望有人可以帮我解决这个问题。

以下是我的代码：

@interface PlayersViewController ()

@end

@implementation PlayersViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];

    self.players = [NSMutableArray arrayWithCapacity:20];

}

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

#pragma mark - Table view data source

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

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    PlayerCell *cell = (PlayerCell *)[tableView
                                      dequeueReusableCellWithIdentifier:@"PlayerCell"];
    Player *player = [self.players objectAtIndex:indexPath.row];
    cell.nameLabel.text = player.name;
    return cell;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [self.players   removeObjectAtIndex:indexPath.row];

        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
        [self.tableView reloadData];

    }
}


- (void)playerDetailsViewControllerDidCancel:
(PlayerDetailsViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)playerDetailsViewControllerDidSave:
(PlayerDetailsViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"AddPlayer"])
    {
        UINavigationController *navigationController =
        segue.destinationViewController;
        PlayerDetailsViewController
        *playerDetailsViewController =
        [[navigationController viewControllers]
         objectAtIndex:0];
        playerDetailsViewController.delegate = self;
    }
}

- (void)playerDetailsViewController:
(PlayerDetailsViewController *)controller
                       didAddPlayer:(Player *)player
{
    [self.players addObject:player];
    NSIndexPath *indexPath =
    [NSIndexPath indexPathForRow:[self.players count] - 1
                       inSection:0];
    [self.tableView insertRowsAtIndexPaths:@[indexPath]
                          withRowAnimation:UITableViewRowAnimationAutomatic];
    [self dismissViewControllerAnimated:YES completion:nil];
}

@interface PlayerDetailsViewController ()

@end

@implementation PlayerDetailsViewController
{
    	NSString *game;
}

- (IBAction)cancel:(id)sender
{
	[self.delegate playerDetailsViewControllerDidCancel:self];
}

- (IBAction)done:(id)sender
{
	Player *player = [[Player alloc] init];
	player.name = self.nameTextField.text;
	[self.delegate playerDetailsViewController:self
                                  didAddPlayer:player];
    
}

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

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

- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
	if (indexPath.section == 0)
		[self.nameTextField becomeFirstResponder];
}

- (void)dealloc
{
	NSLog(@"dealloc PlayerDetailsViewController");
}

Answer 1

好吧，要在应用程序启动之间保存数据，您可以依赖以下主题：

• CoreData
• NSUserDefaults
• Realm
• 其他内容，例如您自己的服务器，自定义sqlite等...

我建议您从CoreData指南开始，它允许您在启动之间轻松保存数据。 希望这可以帮到你。