如何在iOS7中更改UISearchBar的取消按钮色调颜色

我想将Textfield的色调颜色更改为蓝色，并取消UISearchBar的按钮色调颜色为白色。

I want to change tint color of Textfield to blue color and cancel button tint color of UISearchBar to white color.

我正在使用下面的代码。

I am using below code.

for (UIView *subView in searchBar.subviews)
{
    for (UIView *ndLeveSubView in subView.subviews)
    {
        if([ndLeveSubView isKindOfClass:[UITextField class]])
        {
            [(UITextField *)subView setTintColor:[UIColor blueColor]];
        }
        else if ([ndLeveSubView isKindOfClass:[UIButton class]])
        {
            [(UIButton *)subView setTintColor:[UIColor whiteColor]];
        }
    }
}

但这会改变Textfield和取消按钮的色调为白色。任何人都可以建议另一种方法吗？

But this changes both Textfield and cancel button's tint color to white. Can any one suggest another method for it?

这是我得到的......

Here's what I am getting...

TextField的色调颜色也是白色.....

The tint color of TextField is also White.....