????PS:???写?????械????????????????????????些???????????????????????????
????IOS ????????????????????(8GB)????????????????????????????????慰??????????????小????????????椤�
???????????????????????????????????????小??
?????????????xCode 5.0/IOS 5
???????????????????????? 2.6MB???????????????? 0.03%

????1????????????? Push??popup???????
????[self.navigationController pushViewController:m_navanimated:YES];
????[self.navigationController popViewControllerAnimated:YES];
????????
????pushViewController ?????????ViewController????????眉?????+1
????popViewControllerAnimated   ???????ViewController????????眉?????-1
????????????????????????????????
????-(void)dealloc
????{
????//Objects release here
????[super deallco];
????}
?????????????眉????????==0????????????????????渭???
????????泻???[self.navigationController popViewControllerAnimated:YES];??????????????ViewController????????眉??????0???????????dealloc ??????
?????????????
????[self.navigationController pushViewController:m_navanimated:YES];
????[self.navigationController popViewControllerAnimated:YES];
???????????????????????妫�?????????????
????Nav_1 *m_nav = [[[Nav_1  alloc] initWithNibName:nil bundle:nil] autorelease];
????[self.navigationController  pushViewController:m_nav  animated:YES];
????????????????????????????