UINavigation设置背景颜色后 界面适配的问题

//设置导航栏背景颜色
[self.navigationBar setBackgroundImage:图片 forBarMetrics:0];
[self.navigationBar setShadowImage:图片];
//关闭导航栏半透明
 if (IOS7){
      self.interactivePopGestureRecognizer.delegate = (id <UIGestureRecognizerDelegate>) self;
      self.navigationBar.translucent = NO;
 }

if (IOS7) {
    self.automaticallyAdjustsScrollViewInsets = NO;
}