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iOS開發-UI (六)Navigation

編輯：IOS開發綜合

知識點:

1.UINavigationController

2.UINavigationItem

3.UINavigationBar

4.UINavigationController視圖切換

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UINavigationController

1.什麼是導航控制器

作用：管理視圖控制器

2.UINavigationController對象創立

1）初始化方式

- (id)initWithRootViewController:(UIViewController *)rootViewController

2)UINavigationController組成:

（1）navigationBar(高度44)

（2）customContent — 有自定義的ViewController提供

（3）navigationToolbar(高度44)

3.經過UINavigationController對象切換視圖

1）將視圖控制器壓入導航控制器的棧容器中

- (void)pushViewController:(UIViewController *)viewController

animated:(BOOL)animated

2）將視圖控制器從導航控制器中彈出

- (UIViewController *)popViewControllerAnimated:(BOOL)animated

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UINavigationItem

UINavigationItem包括了：

（1）backBarButtonItem(由上一級ctl的屬性決議)

（2）title/titleView(以後ctl)

（3）rightBarButtonItem(以後ctl)

（4）leftBarButtonItem(以後ctl)

1.UINavigationItem和UIViewController關系

navigationItem是UIViewController的一個屬性

這個屬性是為UINavigationController服務的

2.創立UIBarButtonItem

1）創立零碎自帶的UIBarButtonSystemItem

- (id)initWithBarButtonSystemItem:(UIBarButtonSystemItem)systemItem

target:(id)target

action:(SEL)action;

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(btnAction)];

2）文字UIBarButtonItem的創立方式

- (id)initWithTitle:(NSString *)title

style:(UIBarButtonItemStyle)style

target:(id)target

action:(SEL)action

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem new];

3）圖片UIBarButtonItem的創立方式

- (id)initWithImage:(UIImage *)image

style:(UIBarButtonItemStyle)style

target:(id)target

action:(SEL)action

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"refresh_30"] style:UIBarButtonItemStylePlain target:nil action:nil];

3）如何將UIBarButtonItem參加到導航的右邊和左邊

@property (nonatomic, retain) UIBarButtonItem *leftBarButtonItem

@property (nonatomic, retain) UIBarButtonItem *rightBarButtonItem

@property (nonatomic, retain) UIBarButtonItem *backBarButtonItem

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:b];

3.定制UIBarButtonItem

4.定制導航兩頭的titleView

self.navigationItem.title = @"控制器2";

5.定制backBarButtonItem

留意:設置以後控制器的backBarButtonItem需求在下一個控制器中才干顯示

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UINavigationBar

1.如何往UINavigationBar貼圖

設置背景圖片

- (void)setBackgroundImage:(UIImage *)backgroundImage

forBarMetrics:(UIBarMetrics)barMetrics

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"1.png"] forBarMetrics:UIBarMetricsDefault];

2.如何設置UINavigationBar設置顏色

@property (nonatomic, retain) UIColor *tintColor

@property (nonatomic, retain) UIColor *barTintColor

3.如何設置通明顏色

1）設置UINavigationBar的款式

@property (nonatomic, assign) UIBarStyle barStyle

self.navigationController.navigationBar.barStyle= UIBarStyleBlack;

2）能否通明

@property (nonatomic, assign, getter=isTranslucent) BOOL translucent

//獲取管理應前視圖控制器的導航控制器（假如這個視圖控制器沒有遭到導航控制器管理，此辦法會前往空指針）

//設置導航欄為不通明,坐標點會自動下移64個單位

self.navigationController.navigationBar.translucent = NO;

3）改動導航欄的顏色

@property(nonatomic,retain) UIColor *barTintColor

//設置背風光

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

4.如何隱藏UINavigationBar

1）不帶動畫隱藏

@property (nonatomic, getter=isNavigationBarHidden) BOOL navigationBarHidden

//顯示

self.navigationController.navigationBarHidden = NO;

2）帶動畫隱藏

- (void) setNavigationBarHidden:(BOOL)navigationBarHidden

animated:(BOOL)animated

[self.navigationController setNavigationBarHidden:YES animated:YES];

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UINavigationController視圖切換

1.獲取導航控制器中的視圖數組