ios - 如何在 Storyboard 的 UITableView 中显示来自 sqlite 的数据

Question

<分区>

Answer 1

创建一个方法来获取存储在 sqlite 中的所有玩家，比如 findAllPlayers 。创建一个 dataSourceArray，它将保存从上一个方法返回的玩家。为了便于使用，很容易形成模型自定义对象而不是字典。

//Player.h

@interface Player : NSObject

@property (nonatomic) NSUInteger playerID;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *team;

一个实用程序 PlayerDatabase，它从 sqlite 插入和获取播放器实例。

//PlayerDatabase.h

@class Player;
@interface PlayersDatabase : NSObject

+ (PlayersDatabase*)database;
- (NSArray *)findAllPlayers;
- (BOOL)insertPlayer:(Player *)player;

//PlayerDatabase.m
@implementation PlayersDatabase

static PlayersDatabase *_database;

+ (PlayersDatabase*)database {
    if (_database == nil) {
        _database = [[PlayersDatabase alloc] init];
    }
    return _database;
}

- (id)init {
    if ((self = [super init])) {

        NSFileManager *fileManager = [NSFileManager defaultManager];
        NSString *filePath = [self databasePath];
        if (![fileManager fileExistsAtPath:filePath]) {
            NSString *sqLiteDb = [[NSBundle mainBundle] pathForResource:@"Players"
                                                                 ofType:@"db"];
            [fileManager copyItemAtPath:sqLiteDb
                                 toPath:filePath
                                  error:NULL];
        }

    }
    return self;
}

- (NSString *)databasePath
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = paths[0];
    return [documentsDirectory stringByAppendingPathComponent:@"Players.db"];
}

- (NSArray *)findAllPlayers
{
    NSMutableArray *players = [NSMutableArray array];
    FMDatabase *database = [FMDatabase databaseWithPath:[self databasePath]];
    [database open];

    FMResultSet *resultSet = [database executeQuery:@"SELECT * from Player ORDER BY Name"];

    while ([resultSet next]) {

        Player *player = [[Player alloc]init];

        player.playerID = [resultSet intForColumn:@"PlayerID"];
        player.name     = [resultSet stringForColumn:@"Name"];
        player.team     = [resultSet stringForColumn:@"Team"];

        [players addObject:player];

    }

    [database close];

    return players;
}

- (BOOL)insertPlayer:(Player *)player
{
     FMDatabase *db = [FMDatabase databaseWithPath:[self databasePath]];
     [db open];
     BOOL success =  [db executeUpdate:@"INSERT INTO Player (Name,Team) VALUES (?,?);",player.name,player.team, nil];
     [db close];
     return success;
}

现在在带有 tableView 的 viewController 中，首先填充 sqlite，然后重新加载 tableView

//YourViewController.h 
- (void)viewDidLoad
{
    [super viewDidLoad];
    NSArray *names = [NSArray arrayWithObjects:@"Ribery",@"Ronaldo",@"Messi",@"Zannati",@"Totti", nil];
    NSArray *teams = [NSArray arrayWithObjects:@"byern",@"R.Madrid",@"Barcelona",@"Inter",@"Rome", nil];
    for (int i = 0; i < [Name count]; i++)
    {
        Player *player = [[Player alloc]init];

        player.name = names[i];
        player.team = teams[i];

        [[PlayerDatabase database] insertPlayer:player];
    }

    self.players = [self findAllPlayers];
    [self.tableView reloadData];

}

#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 [self.players count];
}
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }
    //Here the dataSource array is of dictionary objects
    Player *player = self.players[indexPath.row];
    cell.textLabel.text = player.name;
    cell.detailTextLabel.text = player.team;

    return cell;
}

我已经按照上述教程制作了一个示例项目，数据已预加载到 sqlite 中。所以你可能需要调整它以供你使用。

Source Code