//设置searchBar取消按钮
UIView *subVie = [searchbar superview];
for (id vie in [subVie subviews]) {
if ([vie isKindOfClass:[UIButton class]]) {
UIButton *btn = (UIButton *)vie;
[btn setTitle:@"取消" forState:UIControlStateNormal];
}
}
原文：http://blog.csdn.net/u013243469/article/details/45194401