ios学习之 初识UINavigationController

今天学习了UINavigationController，在这里总结一下使用方法

NS_CLASS_AVAILABLE_IOS(2_0) @interface UINavigationController : UIViewController

UINavigationController继承自UIViewController，在其基础上封装了头部导航



下面来看看如何使用UINavigationController，首先在AppDelegate.h中添加属性，如下：

#import <UIKit/UIKit.h>
#import "ViewController.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@property (strong,nonatomic) ViewController *vc;//需要显示的ViewController
@property (strong,nonatomic) UINavigationController *navController;//声明一个UINavigationController

@end

然后将UINavigationController加入到window中，再将需要展示的UIViewController加入到UINavigationController中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];

//初始化要显示的ViewController
self.vc=[[ViewController alloc]init];

//先初始化UINavigationController，再将vc加入UINavigationController，再把UINavigationController加入到window中，以下两种方式都可以实现
//1
self.navController=[[UINavigationController alloc]init];
[self.navController pushViewController:self.
vc animated:true];
[self.window addSubview:self.navController.view];
//2
self.window.rootViewController=[[UINavigationController alloc]initWithRootViewController:self.vc];
[self.window makeKeyAndVisible];
return YES;
}