ios - 为 UIButton 设置标题时出错

Question

我试图使 UIButton 的标题成为来自 twitter 的特定 tweet 的收藏夹计数。我可以在功能上获得该号码，并且我已成功获得 Twitter 授权。以下是我尝试设置标题的方式:

        //Set number of Favorites for Tweet
        NSObject *favoritesCount = [[tweet objectForKey:@"user"]objectForKey:@"favourites_count"];
        UIButton *favoritesButton = (UIButton *)[cell viewWithTag:204];
        favoritesButton.titleLabel.text = favoritesCount;

当我运行它时，我在 favoritesButton.titleLabel.text = favoritesCount;

处收到错误

这是我遇到的错误:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber length]: unrecognized selector sent to instance 0x8d3a3a0'

Answer 1

标题应该是 NSString 值。您需要将标题设置为 NSString 而不是 NSObject。

    NSInteger favoritesCount = [[tweet objectForKey:@"user"]objectForKey:@"favourites_count"];
    UIButton *favoritesButton = (UIButton *)[cell viewWithTag:204];
    favoritesButton.titleLabel.text = [NSString stringWithFormat:@"%d",favoritesCount];