-(void)setupNav
{
self.navigationController.navigationBar.translucent = NO;
self.navigationController.navigationBar.barTintColor = [UIColor orangeColor];
UIView *xib = [[NSBundle mainBundle]loadNibNamed:@"DVHomeNav" owner:self options:nil].lastObject;
self.navigationItem.titleView = xib
}
//从控制器中加载xib
xxxvc* vc = [xxxvc alloc]initwithnibname:xxx bundle:xxx]
//navigationbar push popViewController
code:200 服务器请求正常 但数据错误
