寫了很長的NavigationController介紹,結果被cnblog吞了,沒存檔,算了,簡單粗暴,直接上如何使用。數組
1.建立3個Controller,繼承自UIViewControllerapp
在AppDelegate.h中ide
// // AppDelegate.m // UINavigationController // // Created by lcd on 15/9/11. // Copyright (c) 2015年 lcd. All rights reserved. // #import "AppDelegate.h" #import "FirstViewController.h" #import "SecondViewController.h" #import "ThirdViewController.h" @interface AppDelegate () @end @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
FirstViewController *firstViewController = [[FirstViewController alloc] init];字體
firstViewController.view.backgroundColor = [UIColor redColor];atom
SecondViewController *secondViewController = [[SecondViewController alloc] init];spa
secondViewController.view.backgroundColor = [UIColor whiteColor];3d
ThirdViewController *thirdViewController = [[ThirdViewController alloc] init];code
thirdViewController.view.backgroundColor = [UIColor cyanColor];xml
//建立導航控制器 UINavigationController *navigation = [[UINavigationController alloc] init]; return YES; }
2.使用NavigationController有多種方式blog
//第一種:將須要NavigationController 管理的視圖添加進NavigationController 的子視圖數組中 UINavigationController *navigation = [[UINavigationController alloc] init]; navigation.viewControllers = @[firstViewController,secondViewController,thirdViewController];
//第二種:逐個添加子控制器 [navigation addChildViewController:firstViewController]; [navigation addChildViewController:secondViewController]; [navigation addChildViewController:thirdViewController];
//第三種:初始化NavigationController時添加自控制器 UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:firstViewController];
3.添加子控制器後,將navigation設置爲窗口的根控制器
self.window.rootViewController = navigation;
這樣運行,顯示的是第三個ViewController,這是由於,NavigationController是以棧的方式管理子視圖,如圖:
先添加的視圖被放在了棧底,顯示在咱們面前的是棧頂視圖。點擊back會把棧頂視圖彈出,即爲出棧(pop)操做。
NavigationController以 push(入棧)和pop(出棧)管理子視圖。
4. NavigationController 結構
4.1導航欄
被NavigationController管理的視圖公用一個導航欄,導航欄顯示內容由棧頂控制器決定
在ThirdViewController.m中
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.navigationItem.title = @"我是第三個控制器"; }
左上角返回鍵文字(Back) 由上一個控制器控制
在SecondViewController.m中
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回第二個界面" style:nil target:nil action:nil]; }
運行結果以下圖:
4.2 在導航欄添加按鈕
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:nil action:nil]; UIBarButtonItem *button2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCompose target:nil action:nil]; self.navigationItem.rightBarButtonItems = @[button1, button2];
修改右按鈕格式
self.navigationItem.titleView = [UIButton buttonWithType:UIButtonTypeContactAdd]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:nil action:nil]; //左按鈕同理
隱藏back按鈕
[self.navigationItem setHidesBackButton:YES];
4.3 設置導航條樣式
[self.navigationController.navigationBar setBarStyle:UIBarStyleDefault];
typedef NS_ENUM(NSInteger, UIBarStyle) {
UIBarStyleDefault = 0,
UIBarStyleBlack = 1,
UIBarStyleBlackOpaque = 1, // Deprecated. Use UIBarStyleBlack
UIBarStyleBlackTranslucent = 2, // Deprecated. Use UIBarStyleBlack and set the translucent property to YES
};
設置導航欄圖片
[self.navigationController.navigationBar
setBackgroundImage:[UIImage imageNamed:@"圖片名稱"] forBarMetrics:UIBarMetricsDefault];
4.4 其餘屬性
//設置導航條顏色 self.navigationController.navigationBar.barTintColor = [UIColor orangeColor]; //關閉導航條毛玻璃效果 // self.navigationController.navigationBar.translucent = NO; //隱藏導航條 // self.navigationController.navigationBarHidden = YES; //設置導航條內容的顏色 self.navigationController.navigationBar.tintColor = [UIColor whiteColor]; //導航條背景圖片 [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"pic"] forBarMetrics:UIBarMetricsDefault];
titleTextAttributes
//這是UINavigationBar的一個屬性,經過它你能夠設置title部分的字體,這個屬性定義以下 @property(nonatomic,copy) NSDictionary *titleTextAttributes __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0) UI_APPEARANCE_SELECTOR; //設置title的字體顏色爲黃色 NSDictionary *dict = [NSDictionary dictionaryWithObject:[UIColor yellowColor] forKey:UITextAttributeTextColor]; firstViewController.navigationController.navigationBar.titleTextAttributes = dict;
5.界面跳轉
從FirstViewController跳轉到SceondViewController
在FirstViewController.m中,添加button,並在button事件中添加以下代碼:
SecondViewController *secondViewController = [[SecondViewController alloc] init];
[self.navigationController pushViewController:secondViewController animated:YES];
從SceondViewController返回FirstViewController:
[self.navigationController popViewControllerAnimated:YES];
注意:從後一個界面跳轉回前一個界面,必定要用popViewController,千萬不要alloc一個FirstViewController,push到FirstViewController
[self.navigationController popToRootViewControllerAnimated:YES];//這個方法能夠跳轉回第一個界面