iOS UINavigation

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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];}

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