UINavigationController 详解

// 导航控制器

// 1. 比较常用的视图控制器管理类

// 2. 以栈的形式管理视图控制器, 先进后出

// 3. 创建navigation后, 视图控制器上会多出一个导航栏

// 4. 导航栏高度 44 + 加 状态栏 20

对导航视图控制器的一些属性和方法的应用:

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    // 设置navigationbar 的属性

    // 1. title 标题

    self.title = @"标题";  // 这里的title被冲掉了

    self.navigationItem.title = @"XXX";

    // 2. titleview 标题视图

    // 标题视图, 修改x, y对视图本身没有影响

    UISegmentedControl *seg = [[UISegmentedControl alloc] initWithItems:@[@"晃晃", @"马峰"]];

    seg.frame = CGRectMake(, , , );

    self.navigationItem.titleView = seg;

    // 3. leftBarButtonItem

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(back:)];

    // 4. rightBarButtonItem

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(nibBundle)];

    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPlay target:self action:@selector(nibBundle)];

    // 5. leftBarButtonItems

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

    UIBarButtonItem *barButtonItemTitle1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(back:)];

    self.navigationItem.leftBarButtonItems = @[barButtonItemTitle, barButtonItemTitle1];

    // 6. leftBarButtonItems

    // leftBarButtonItems 数组中放一到两个为优

    // 7. 隐藏 下面两个等效

    self.navigationController.navigationBarHidden = NO;

    self.navigationController.navigationBar.hidden = NO;

    // 8. barStyle 背景样式, 默认default

    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;

    // 9. navigationBar的背景颜色

    self.navigationController.navigationBar.backgroundColor = [UIColor redColor];

    // 10. barTintColor Bar的颜色

    self.navigationController.navigationBar.barTintColor = [UIColor redColor];

    // 11. Bar上元素的颜色

    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

    // 12. translucent 管理半透明效果, YES为开启, NO为关闭

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];

    button.backgroundColor = [UIColor yellowColor];

    [button addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];

    button.frame = CGRectMake(, , , );

    [self.view addSubview:button];

    // 设置为yes时, self.view坐标系从原点开始

    // 设置为no时, self.view坐标系从navigationBar开始

    // 默认为yes

    self.navigationController.navigationBar.translucent = YES;

    // 13. 改变坐标效果, 与translucent为NO效果一样

    //self.edgesForExtendedLayout = UIRectEdgeNone;

    // 页面跳转相关

    // 1. push 入栈 pushViewController

    // 2. pop 出栈 popViewControllerAnimated

    // 3. viewcontroller 存放navigationgController里所有的视图控制器

    // 4. topViewController 栈顶视图控制器

    // 5. visibleViewController 当前显示的视图控制器

}