调整UINavigationController布局问题

Question

我想在我的扩展UINavigationController中添加一个ADBannerView。 当旗帜负载我重新大小这样的观点：

CGRect contentFrame = [[UIScreen mainScreen] applicationFrame]; 
banner.currentContentSizeIdentifier = ADBannerContentSizeIdentifier320x50; 
bannerHeight = banner.bounds.size.height; 

self.view.frame = CGRectMake(self.view.bounds.origin.x, 
            (self.view.bounds.origin.y), 
            self.view.bounds.size.width, 
            contentFrame.size.height - (bannerHeight)); 

但UIView的是导航栏下部分墙根：here

任何想法有什么不好？

感谢

[1]：

Answer 1

self.view.frame = CGRectMake(self.view.bounds.origin.x, 
           (self.view.bounds.origin.y)+(bannerHeight), 
           self.view.bounds.size.width, 
           contentFrame.size.height - (bannerHeight));