Restkit-如何在表格视图中显示 json 数据

Question

我使用 rest kit 0.20.3 和 xcode 5 创建了一个应用程序。我在我的服务器上创建了 2 个对象。但我无法在表格视图中显示数据。下面是我的表格视图的代码： PlayerViewController.m

#import "PlayerViewController.h"
#import <RestKit/RestKit.h>
#import "Player.h"

@interface PlayerViewController ()

@end

@implementation PlayerViewController

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

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIRefreshControl *refreshControl = [UIRefreshControl new];
    [refreshControl addTarget:self action:@selector(loadPlayers) forControlEvents:UIControlEventValueChanged];
    self.refreshControl = refreshControl;

    [self loadPlayers];
    [self.refreshControl beginRefreshing];

}

-(void)loadPlayers{

    [[RKObjectManager sharedManager] getObjectsAtPath:@"/players.json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
        [self.tableView reloadData];
        [self.refreshControl endRefreshing];
    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        [self.refreshControl endRefreshing];
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An Error Has Occurred" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
    }];}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return players.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"PlayerCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    Player *player = [players objectAtIndex:indexPath.row];
    cell.textLabel.text = player.playerName;

    return cell;
}

玩家数组计数显示为 0。我知道我在这里遗漏了一些东西，但似乎无法弄清楚。 谢谢。

Answer 1

您需要将数据分配给您的玩家数组：

[[RKObjectManager sharedManager] getObjectsAtPath:@"/players.json" 
                                       parameters:nil 
                                          success:^(RKObjectRequestOperation *operation, 
                                                    RKMappingResult *mappingResult) {
    self.players = mappingResult.array; // <-- doing the actual assignment
    [self.tableView reloadData];
    [self.refreshControl endRefreshing];
} // ... the rest of your code

这假设您的映射正确。