RDVTabbar 自定义Item的title

    //居中对齐
        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init] ;
        [paragraphStyle setAlignment:NSTextAlignmentCenter];
        NSDictionary *tabBarTitleUnselectedDic = @{NSForegroundColorAttributeName:UIColor.from(CAssetGray),NSFontAttributeName:[UIFont systemFontOfSize:10.f weight:UIFontWeightMedium]};
        
        NSDictionary *tabBarTitleSelectedDic = @{NSForegroundColorAttributeName:UIColor.from(CAssetPink),NSFontAttributeName:[UIFont systemFontOfSize:10.f weight:UIFontWeightMedium]};
        //修改tabberItem的title颜色
        item.selectedTitleAttributes = tabBarTitleSelectedDic;
        item.unselectedTitleAttributes = tabBarTitleUnselectedDic;

要注意的一点是，他的内部实现里使用了四舍五入去舍取得到文字的居中位置。所以遇到汉字会出现不准的情况，需要把roundf的方法去掉