iOS UIsearchBar 修改右侧 cancel

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
    searchBar.showsCancelButton = YES;
    for(UIView *view in  [[[searchBar subviews] objectAtIndex:0] subviews]) {
        if([view isKindOfClass:[NSClassFromString(@"UINavigationButton") class]]) {
            UIButton * cancel =(UIButton *)view;
            [cancel setTitle:@"搜索" forState:UIControlStateNormal];
            cancel.titleLabel.font = [UIFont systemFontOfSize:14];
        }
    }
}