IOS6和IOS7 显示一样的SearchBar

 if (isIOS7) {
        mySearchBar=[[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
        mySearchBar.autocorrectionType =  UITextAutocorrectionTypeNo;
        mySearchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
        mySearchBar.keyboardType = UIKeyboardTypeDefault;
        mySearchBar.placeholder = @"全国地区(中文/拼音/区号/别名)                    ";
        mySearchBar.delegate =self;
        mySearchBar.tag = 100;
        mySearchBar.showsCancelButton =NO;//是否显示取消按钮
        [mySearchBar setBackgroundColor:MF_ColorFromRGB(229, 229, 229)];
        [[[[mySearchBar.subviews objectAtIndex:0] subviews] objectAtIndex:0] removeFromSuperview]; // 去掉搜索框背景
        [[UILabel appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:MF_ColorFromRGB(181, 181, 181)]; // 修改placeholder textColor
        [self.view addSubview:mySearchBar];
    }
    else
    {
        mySearchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 2, 320, 40)];
        mySearchBar.delegate = self;
        mySearchBar.autocorrectionType = UITextAutocorrectionTypeNo;
        mySearchBar.autocapitalizationType = UITextAutocapitalizationTypeNone;
        mySearchBar.placeholder = @"全国地区(中文/拼音/区号/别名)";
        mySearchBar.keyboardType =  UIKeyboardTypeDefault;
        [mySearchBar setTranslucent:YES];
        mySearchBar.backgroundColor = MF_ColorFromRGB(229, 229, 229);
        [[mySearchBar.subviews objectAtIndex:0]removeFromSuperview];  // 去掉搜索框背景
        [[UILabel appearanceWhenContainedIn:[UISearchBar class], nil] setTextColor:MF_ColorFromRGB(181, 181, 181)]; // 修改placeholder textColor
        [self.view addSubview:mySearchBar];
        
        // 替换UITextField背景图
        UITextField* searchField = nil;
        for (UIView* subview in mySearchBar.subviews) {
            if ([subview isKindOfClass:[UITextField class]])
            {
                searchField = (UITextField*)subview;
                break;
            }
        }
        searchField.background = [MF_PngWithSkin(DEFAULTS_SKIN, @"search_Bar_bgImg.png") stretchableImageWithLeftCapWidth:30 topCapHeight:30];
    }