ios - 如何访问对象数组中对象的属性

Question

我有一个对象数组 _schedule.games 我想在循环播放时间表时显示每个游戏中的 Game 属性对手。

    int x = 0;
    for (int i = 0; i < [_schedule.games count]; i++)
    {
        Game *game = [_schedule.games objectAtIndex:i];
        game.opponent = ((Game *) [_schedule.games objectAtIndex:i]).opponent;
        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x, 0, 100, 100)];

        [button setTitle:[NSString stringWithFormat:@"%@", game.opponent] forState:UIControlStateNormal];

        [_gameScrollList addSubview:button];

        x += button.frame.size.width;

    }

Answer 1

1.

    Game *game = [_schedule.games objectAtIndex:i];

为您提供数组内的游戏实例，因此无需再次分配属性

game.opponent = ((Game *) [_schedule.games objectAtIndex:i]).opponent;

game.opponent 具有数组对象属性中的值，因此您可以直接将其调用为 game.opponent 。

2.

[NSString stringWithFormat:@"%@", game.opponent] 表示 game.opponent 是一个字符串，因此无需再次将其类型转换为 NSString

所以方法如下

int x = 0;
for (int i = 0; i < [_schedule.games count]; i++)
{
    Game *game = (Game *)[_schedule.games objectAtIndex:i];
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x, 0, 100, 100)];
    [button setTitle:game.opponent forState:UIControlStateNormal];
    [_gameScrollList addSubview:button];
    x += button.frame.size.width;
}