修改UITabBarItem下面字体的颜色，如图：

[img]http://img.blog.csdn.net/20150108133337062

[[UITabBarItemappearance] setTitleTextAttributes:[NSDictionarydictionaryWithObjectsAndKeys:[UIColorblackColor], UITextAttributeTextColor,nil] forState:UIControlStateNormal];
    [[UITabBarItemappearance] setTitleTextAttributes:   [NSDictionarydictionaryWithObjectsAndKeys:[UIColorredColor],UITextAttributeTextColor,nil]forState:UIControlStateSelected];
这个时候会报警告'UITextAttributeTextColor' is deprecated in iOS 7. The iOS 7 key is 'NSForegroundColorAttributeName

然后替换一下就可以了，不过NSForegroundColorAttributeName最底支持到ios6.0
[[UITabBarItemappearance] setTitleTextAttributes:[NSDictionarydictionaryWithObjectsAndKeys:[UIColorblackColor], NSForegroundColorAttributeName,nil] forState:UIControlStateNormal];
    [[UITabBarItemappearance] setTitleTextAttributes:  [NSDictionarydictionaryWithObjectsAndKeys:[UIColorredColor],NSForegroundColorAttributeName,nil]forState:UIControlStateSelected];
以上是改变字体颜色的，图片颜色无法改变，
[[UITabBar appearance]setTintColor:[UIColor redColor]];
但是上面这一句就可以改变并设置点击后的图片和文字颜色了。