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/**
導航控制器掌握:
1.建立導航控制器
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:self.viewController];
2.zhan (zhan 中所有的子控制器)
self.navigationController.viewControllers;
3.將控制器壓入zhan 中
[self.navigationController pushViewController:second animated:YES];
4.將控制器從zhan 中彈出
1>將zhan 頂控制器彈了
5.導覽列顯示的內容
//彈回zhan頂
//[self.navigationController popViewControllerAnimated:YES];
//回到 底控制器(根控制器)
//彈回zhan 底
[self.navigationController popToRootViewControllerAnimated:YES];
//回到哪 人控制器
//[self.navigationController popToViewController:animated:YES];
5.導覽列顯示的內容
//zhan 頂控制器的navigationItem屬性
self.navigationItem.title = @"你好世界";
self.navigationItem.leftBarButtonItem =[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
//設定下一個介面的返回按鈕
self.navigationItem.backBarButtonItem =[[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:nil action:nil];
/zhan 頂控制器的navigationItem屬性決定了導覽列顯示的東西@
//導覽列左邊的返回鍵,是由上一個鍵決定的
//self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCompose target:nil action:nil];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"設定" style:UIBarButtonItemStyleDone target:self action:@selector(clickSetting)];
// Do any additional setup after loading the view from its nib.
6.//zhan 頂控制器
self.navigationController.topViewController;
*/