iOS UINavigation

创建一个导航条，代码如下：

#import "AppDelegate.h"
#import "ViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    ViewController *aVC = [[ViewController alloc] init];
    UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:aVC];
    self.window.rootViewController = navigation;
    return YES;
}

页面的跳转，代码如下：

#import "ViewController.h"
#import "QViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor blueColor];

    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(10, 100,self.view.frame.size.width-20,  50)];
    [btn setTitle:@"详情" forState:UIControlStateNormal];
    [btn setBackgroundColor:[UIColor redColor]];
    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];


}

-(void)btnClick:(id) sender {
    QViewController *aVC = [[QViewController alloc] init];
    [self.navigationController pushViewController:aVC animated:YES];
}