摘要：
转：http://hi.baidu.com/ivan_xu/item/237bb1ad77eff9b028ce9d7c有A、B两个ViewController,假如A push B；UINavigationItem 的3个属性有backBarButtonItem, leftBarButtonItem, rightBarButtonItem。设置B_ViewController的leftBarButtonItem 和rightBarButtonItem.则采用UIBarButtonItem *cancelBtnItem = [[UIBarButtonItem alloc]initWithTitl 阅读全文
