iOS Dev (14) NavigationController基础示例

• 作者：CSDN 大锐哥
• 博客：http://blog.csdn.net/prevention

AppDelegate

.h

#import <UIKit/UIKit.h>

@class ViewController

@interface AppDelegate: UIResponder <UIApplicationDelegate>

@property <strong, nonatomic> UIWindow *window;
@property <strong, nonatomic> ViewController *vc;

@end

.m

#import "AppDelegate.h"
#import "ViewController.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.vc = [[ViewController alloc] initWithNibName:nil bundle:nil];
    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:self.vc]
    [self.window makeKeyAndVisible];
    return YES;
}

@end

主视图

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController: UIViewController

@end

ViewController.m，注意看 pushMethod 和 presentMethod。注意后者与前者完全不同哦，前者是 self.navigationController 相关的方法，后者是 self 自己的（也就是 UIViewController 的）。注意后者有一个 completion 参数后，如果啥也不想写就用 ^{} 来代替。

#import "ViewController.h"
#import "LLViewController.h"
#import "MMViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIButton *pushButton = [[UIButton alloc] initWithFrame:CGRectMake(10, 200, 100, 100)];
    [pushButton setTitle:@"Push" forState:UIControlStateNormal];
    [pushButton setBackgroundColor:[UIColor redColor]];
    [pushButton addTarget:self action:@selector(pushMethod:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubView:pushButton];

    UIButton *presentButton = [[UIButton alloc] initWithFrame:CGRectMake(10, 400, 100, 100)];
    [presentButton setTitle:@"present" forState:UIControlStateNormal];
    [presentButton setBackgroundColor:[UIColor redColor]];
    [presentButton addTarget:self action:@selector(presentMethod:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubView:presentButton];
}

- (void)didReceiveMemoryWarning
{
}

- (void)pushMethod:(UIButton *)button
{
    [self.navigationController pushViewController:[[LLViewController alloc] init] animated:YES];
}

- (void)presentMethod:(UIButton *)button
{
    [self presentViewController:[[MMViewController alloc] init] animated:YES completion:^{}]
}

@end

另外两个视图

上面演示的是从主视图切换到另外两个视图，一个是LLViewController，一个是MMViewController。前者是从右向左移入的，后者是从下向上移入的。

LLViewController.h

#import <UIKit/UIKit.h>

@interface LLViewController: UIViewController
@end

LLViewController.m，注意看 popMethod。

#import "LLViewController.h"

@interface LLViewController()
@end

@implementation LLViewController

- (void)didViewLoad
{
    [super didViewLoad];

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 200, 100, 100)];
    [button setTitle:@"Pop" forState:UIControlStateNormal];
    [button setBackgroundColor:[UIColor redColor]];
    [button addTarget:self action:@selector(popMethod:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubView:button];
}

- (void)didReceiveMemoryWarning
{
}

- (void)popMethod
{
    [self.nagivationController popViewControllerAnimated:YES];
}

@end

MMViewController.h

#import <UIKit/UIKit.h>

@interface MMViewController: UIViewController
@end

MMViewController.m 主要看 dismissMethod。注意这个方法与 presentMethod 是类似的，而与 pop 是完全不同的。

#import "MMViewController.h"

@interface MMViewController()
@end

@implementation MMViewController

- (void)didViewLoad
{
    [super didViewLoad];

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 400, 100, 100)];
    [button setTitle:@"Dismiss" forState:UIControlStateNormal];
    [button setBackgroundColor:[UIColor redColor]];
    [button addTarget:self action:@selector(dismissMethod:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubView:button];
}

- (void)didReceiveMemoryWarning
{
}

- (void)dismissMethod
{
    [self dismissViewControllerAnimated:YES completion:^{}];
}

@end

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