ios---设置UITabBarController的字体颜色和大小

+(void)load{
    NSMutableDictionary *attr3=[NSMutableDictionary dictionary];
    attr3[NSForegroundColorAttributeName]=[UIColor blackColor];
    attr3[NSFontAttributeName]=[UIFont systemFontOfSize:14];
    [[UITabBarItem appearance]setTitleTextAttributes:attr3 forState:UIControlStateNormal];

    NSMutableDictionary *attr4=[NSMutableDictionary dictionary];
    attr4[NSForegroundColorAttributeName]=[UIColor redColor];
    attr4[NSFontAttributeName]=[UIFont systemFontOfSize:14];
    [[UITabBarItem appearance]setTitleTextAttributes:attr4 forState:UIControlStateSelected];

}