ios7 UISearchBar

if(IOS7BC){

       UIView *topView = VTOSearchBar.subviews[0];

       UIButton *cancelButton;

       for (UIView *subViewin topView.subviews) {

            if([subViewisKindOfClass:[NSClassFromString(@"UINavigationButton")class]]) {

                cancelButton = (UIButton*)subView;

                [cancelButton setBackgroundImage:[UIImageimageNamed:@"xxx.png"]forState:UIControlStateNormal];

                [cancelButtonsetEnabled:YES];

                cancelButton.userInteractionEnabled =YES;

                [cancelButtonsetTitle:@"发布活动" forState:UIControlStateNormal];

            }

        }

    }else{

        [VTOSearchBarsetTintColor:Bar_COLOR];

       for(id cancelbuttonin [VTOSearchBarsubviews])//将取消键换成发布活动

        {

           if([cancelbutton isKindOfClass:[UIButtonclass]])

            {

               UIButton *btn = (UIButton *)cancelbutton;

                [btnsetEnabled:YES];

                btn.userInteractionEnabled =YES;

                [btnsetTitle:@"发布活动"  forState:UIControlStateNormal];

                

            }

        }

    }