UINavigationController-白红宇

UINavigationController

阅读量：6882 次

发布时间：2019-06-27

本文共 4091 字，大约阅读时间需要 13 分钟。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

// Override point for customization after application launch.

self.window.backgroundColor = [UIColor whiteColor];

//导航视图控制器也是一个视图控制器，TA管理了多个子视图控制器，是系统提供给我们的容器视图控制器。

//导航视图控制器至少管理一个子视图控制器，这个视图控制器称为导航视图控制器的根视图控制器

//如果我们的程序想要采用导航视图控制器进行布局，我们需要指定window的根视图控制器为导航视图控制器

RootViewController *rootVC = [[RootViewController alloc] init];

UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:rootVC];

//设置导航栏的显隐属性

naVC.navigationBarHidden = NO;

self.window.rootViewController = naVC;

//设置导航栏样式

naVC.navigationBar.barStyle = UIBarStyleDefault;

//设置导航条的背景颜色

naVC.navigationBar.backgroundColor = [UIColor greenColor];

//设置导航栏颜色

naVC.navigationBar.barTintColor = [UIColor greenColor];

//设置导航栏元素颜色

naVC.navigationBar.tintColor = [UIColor yellowColor];

[rootVC release];

[naVC release];

[self.window makeKeyAndVisible];

return YES;

}

@implementation RootViewController

- (void)leftAction {

self.view.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1.0];

}

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];

//每一个加到导航视图控制器内部的视图控制器自带一个属性叫navigationItem，可以配置当前页面导航条的显示内容，比如左、右按钮，标题等

self.navigationItem.title = @"中二洪荒";

//创建左按钮

/* 1 显示标题

UIBarButtonItem *left = [[UIBarButtonItem alloc] initWithTitle:@"巴达" style:UIBarButtonItemStylePlain target:self action:@selector(leftAction)];*/

/* 2 使用系统自带图标样式

UIBarButtonItem *left = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(leftAction)];*/

/* 3 使用自定义图片显示

UIImage *image = [UIImage imageNamed:@"dianhua"];

UIBarButtonItem *left = [[UIBarButtonItem alloc] initWithImage:[image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] style:UIBarButtonItemStylePlain target:self action:@selector(leftAction)];

//指定左按钮

self.navigationItem.leftBarButtonItem = left;*/

// 4 使用自定义视图显示

UISwitch *mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];

[self.view addSubview:mySwitch];

// UIBarButtonItem *left = [[UIBarButtonItem alloc] initWithCustomView:mySwitch];

// self.navigationItem.leftBarButtonItem = left;

// [mySwitch release];

// [left release];

//设置左、右按钮显示多个

UIBarButtonItem *first = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(add)];

UIBarButtonItem *second = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(bookmark)];

self.navigationItem.rightBarButtonItems = @[first, second];

[first release];

[second release];

//设置导航条上的标题视图

UISegmentedControl *seg = [[UISegmentedControl alloc] initWithItems:@[@"中二洪荒", @"洪荒中二"]];

seg.selectedSegmentIndex = 0;

// seg.momentary = YES;

self.navigationItem.titleView = seg;

[seg release];

// 导航栏半透明效果(iOS7以后默认为YES)

// 当半透明效果开启时屏幕左上角为坐标原点

// 关闭时导航栏左下角为坐标原点