iOS学习之UINavigationController

    // 创建UIWindow对象
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    
    // 设置背景颜色
    self.window.backgroundColor = [UIColor whiteColor];
    
    // 使window显示
    [self.window makeKeyAndVisible];
    
    // 创建视图控制器，给window指定根控制器,设置导航控制器
    self.window.rootViewController = [[UINavigationController alloc] initWithRootViewController:[[RootViewController alloc] init]];

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor brownColor];
 
    // 设置导航控制器
    [self initLayout]; 
}

// 初始化布局（实现布局的方法）
- (void)initLayout
{
    // 导航控制器的显示隐藏属性(YES == 隐藏, NO == 显示)
    self.navigationController.navigationBarHidden = NO;
    
    // UINavigationBar(导航条,iOS7.0 之后导航条默认有半透明属性)
    // 设置导航条是否开启半透明效果(会影响self.subViews的坐标系，当半透明效果开启时，self.view以屏幕左上角为坐标原点，关闭时，导航条左下角为坐标原点)
    self.navigationController.navigationBar.translucent = NO;

    // 修改导航条颜色，状态栏颜色默认与导航条颜色相同
    self.navigationController.navigationBar.barTintColor = [UIColor grayColor];
    
    // 导航条背景颜色
    self.navigationController.navigationBar.backgroundColor = [UIColor redColor];
    
    // 设置导航条标题
//    self.title = @"根视图";
    // navigationItem属性，用来设置子控件
    self.navigationItem.title = @"根视图";
    
    // 左按钮
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"左按钮" style:UIBarButtonItemStylePlain target:self action:@selector(leftItemAciton:)];
    
    // 右按钮
    // 一个按钮
//    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(rightItemClick:)];
//    
//    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"next"] style:UIBarButtonItemStylePlain target:self action:@selector(rightItemClick:)];
    
    // 多个按钮, 自动排序
    
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(rightItemClick:)];
    
    UIBarButtonItem *item2 =[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self action:@selector(rightItemClick:)];
    
    self.navigationItem.rightBarButtonItems = @[item2, item1];
    
    // 设置导航元素的颜色
    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
    
    // 导航栏样式
    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
    
    // 标题视图
    
    UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:@[@"男神", @"女神", @"-1"]];
    segment.frame = CGRectMake(0, 0, 150, 30);
    segment.selectedSegmentIndex = 0;
    [segment addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    
    self.navigationItem.titleView = segment;
    
    
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    view.backgroundColor = [UIColor lightGrayColor];
    [self.view addSubview:view];
    

}
// 实现左按钮方法
- (void)leftItemAciton:(UIBarButtonItem *)sender
{
    NSLog(@"跟着我左手 慢动作");
}
- (void)segmentAction:(UISegmentedControl *)sender
{
    switch (sender.selectedSegmentIndex) {
        case 0:
            self.view.backgroundColor = [UIColor colorWithRed:1 green:0 blue:0  alpha:1];
            break;
        case 1:
            self.view.backgroundColor = [UIColor colorWithRed:0 green:1 blue:0  alpha:1];
            break;
        case 2:
            self.view.backgroundColor = [UIColor colorWithRed:0 green:0 blue:1  alpha:1];
            break;
            
        default:
            break;
    }
    
}

// 实现右按钮方法
- (void)rightItemClick:(UIBarButtonItem *)sender
{
    NSLog(@"跟着我右手 慢动作重播");
}
@end

- (void)modelBtnAction:(UIButton *)sender
{
    // 创建第二页对象
    ShowViewController *sVC = [[ShowViewController alloc] init];
    // 给第二页设置导航控制器
    UINavigationController *sNVC = [[UINavigationController alloc] initWithRootViewController:sVC];
    // 添加模态动画
    sVC.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    // 模态跳到下一个页面
    [self.navigationController presentViewController:sNVC animated:YES completion:nil];
}

- (void)backBtnAction:(UIButton *)sender
{
    // 模态返回上一个视图
    [self dismissViewControllerAnimated:YES completion:nil];
}

// 模态动画的效果
// UIModalTransitionStylePartialCurl 翻页方式 推出
// UIModalTransitionStyleFlipHorizontal 水平旋转方式 推出
// UIModalTransitionStyleCrossDissolve 交叉叠化溶解方式 推出
// UIModalTransitionStyleCoverVertical 垂直覆盖方式 推出