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建设一个购物网站要多少钱,wordpress 数字交易,四川建设厅网站复查中,安装建设手机银行移动门户网站一、导航控制器和工具栏 在 iOS 开发中#xff0c;UINavigationController 是一个视图控制器管理器#xff0c;用于在多个视图控制器之间进行有层级的导航#xff08;如页面的前进、返回#xff09;#xff0c;就像网页的前进/后退一样。 继承关系#xff1a;NSObject-UINavigationController 是一个视图控制器管理器用于在多个视图控制器之间进行有层级的导航如页面的前进、返回就像网页的前进/后退一样。 继承关系NSObject-UIResponder-UIViewController-UINavigationController #import UIKit/UIKit.hNS_ASSUME_NONNULL_BEGINinterface VCRoot : UIViewControllerendNS_ASSUME_NONNULL_END#import VCRoot.hinterface VCRoot ()endimplementation VCRoot- (void)viewDidLoad {[super viewDidLoad];[super viewDidLoad];self.view.backgroundColor [UIColor blackColor];self.navigationItem.title Pornhub;UINavigationBarAppearance *appearance [[UINavigationBarAppearance alloc] init];[appearance configureWithOpaqueBackground];appearance.backgroundColor [UIColor orangeColor]; appearance.titleTextAttributes { NSForegroundColorAttributeName : [UIColor whiteColor] };self.navigationController.navigationBar.standardAppearance appearance;self.navigationController.navigationBar.scrollEdgeAppearance appearance;//创建一个导航栏左侧的按钮这是根据title文字来创建的传入四个参数//第一个参数是按钮上的文字内容第二个参数是按钮风格//第三个参数是事件的拥有者第四个参数是按钮的事件函数UIBarButtonItem *leftBtn [[UIBarButtonItem alloc] initWithTitle: style: UIBarButtonItemStyleDone target: self action: selector(pressLeft)];//给导航栏的左侧按钮属性赋值为我们创建好的左侧按钮self.navigationItem.leftBarButtonItem leftBtn;//右侧按钮//和左侧按钮不同的是这里创建右侧按钮的时候我们使用的初始化方法是不一样的//这里的初始化方法不需要输入文字内容而是指定了系统提供的风格样式系统风格的按钮内容或标题文字不可更改UIBarButtonItem *rightBtn [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAdd target: self action: selector(pressRight)];self.navigationItem.rightBarButtonItem rightBtn;//创建多按钮//先创建一个标签对象UILabel *label [[UILabel alloc] initWithFrame: CGRectMake(10, 10, 50, 40)];label.text ❤️;//将label设置为居中label.textAlignment NSTextAlignmentCenter;label.textColor [UIColor orangeColor];//将UIlabel类型的控件添加到导航栏按钮//initWithCustomView就代表以自定义控件来初始化UIBarButtonItem *item3 [[UIBarButtonItem alloc] initWithCustomView: label];//创建一个按钮数组NSArray arrayBtn [NSArray arrayWithObjects: rightBtn, item3, nil];//将右侧按钮数组赋值self.navigationItem.rightBarButtonItems arrayBtn;}- (void) pressLeft {NSLog(左侧按钮被按下); }- (void) pressRight {NSLog(右侧按钮被按下); }/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation

• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end #import SceneDelegate.h #import VCRoot.h interface SceneDelegate ()endimplementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)sessionoptions:(UISceneConnectionOptions *)connectionOptions {// 初始化 window 并绑定到当前 sceneself.window [[UIWindow alloc] initWithWindowScene:(UIWindowScene )scene];self.window.frame [UIScreen mainScreen].bounds;// 创建根视图控制器VCRoot root [[VCRoot alloc] init];// 创建导航控制器并设置根视图控制器UINavigationController* nav [[UINavigationController alloc] initWithRootViewController:root];// 设置 window 的根控制器self.window.rootViewController nav;// 显示窗口[self.window makeKeyAndVisible]; }- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see application:didDiscardSceneSessions instead). }- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive. }- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call). }- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background. }- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state. }end导航控制器切换 #import VCRoot.h #import VCSecond.h interface VCRoot ()endimplementation VCRoot- (void)viewDidLoad {[super viewDidLoad];[super viewDidLoad];self.view.backgroundColor [UIColor blackColor];self.navigationItem.title Pornhub;UINavigationBarAppearance *appearance [[UINavigationBarAppearance alloc] init];[appearance configureWithOpaqueBackground];appearance.backgroundColor [UIColor orangeColor]; appearance.titleTextAttributes { NSForegroundColorAttributeName : [UIColor whiteColor] };self.navigationController.navigationBar.standardAppearance appearance;self.navigationController.navigationBar.scrollEdgeAppearance appearance;//创建一个导航栏左侧的按钮这是根据title文字来创建的传入四个参数//第一个参数是按钮上的文字内容第二个参数是按钮风格//第三个参数是事件的拥有者第四个参数是按钮的事件函数UIBarButtonItem *leftBtn [[UIBarButtonItem alloc] initWithTitle: style: UIBarButtonItemStyleDone target: self action: selector(pressLeft)];//给导航栏的左侧按钮属性赋值为我们创建好的左侧按钮self.navigationItem.leftBarButtonItem leftBtn;//右侧按钮//和左侧按钮不同的是这里创建右侧按钮的时候我们使用的初始化方法是不一样的//这里的初始化方法不需要输入文字内容而是指定了系统提供的风格样式系统风格的按钮内容或标题文字不可更改 // UIBarButtonItem *rightBtn [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAdd target: self action: selector(pressRight)]; // self.navigationItem.rightBarButtonItem rightBtn;UIBarButtonItem *next [[UIBarButtonItem alloc] initWithTitle: style: UIBarButtonItemStylePlain target: self action: selector(pressNext)];self.navigationItem.rightBarButtonItem next;//创建多按钮//先创建一个标签对象UILabel *label [[UILabel alloc] initWithFrame: CGRectMake(10, 10, 50, 40)];label.text ❤️;//将label设置为居中label.textAlignment NSTextAlignmentCenter;label.textColor [UIColor orangeColor];//将UIlabel类型的控件添加到导航栏按钮//initWithCustomView就代表以自定义控件来初始化UIBarButtonItem *item3 [[UIBarButtonItem alloc] initWithCustomView: label];//创建一个按钮数组// NSArray *arrayBtn [NSArray arrayWithObjects: rightBtn, item3, nil];//将右侧按钮数组赋值 // self.navigationItem.description label;}- (void) pressLeft {NSLog(左侧按钮被按下); }- (void)pressNext {//创建新的视图控制器VCSecond vcSecond [[VCSecond alloc] init];//使用当前视图控制器的导航控制器对象[self.navigationController pushViewController: vcSecond animated: YES]; }/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end#import VCSecond.h #import VCThird.hinterface VCSecond ()endimplementation VCSecond- (void)viewDidLoad {[super viewDidLoad];//设置视图二的标题和颜色self.view.backgroundColor [UIColor whiteColor];self.title 欧美;//为视图控制器导航栏设置右侧按钮UIBarButtonItem *btnNext [[UIBarButtonItem alloc] initWithTitle: 下一级 style: UIBarButtonItemStylePlain target: self action: selector(pressNext)];self.navigationItem.rightBarButtonItem btnNext;//为视图控制器导航栏设置返回的左侧按钮UIBarButtonItem *btnLeft [[UIBarButtonItem alloc] initWithTitle: 返回上一级 style: UIBarButtonItemStylePlain target: self action: selector(pressBack)];self.navigationItem.leftBarButtonItem btnLeft; }- (void)pressNext {//创建新的视图控制器VCThird vcThird [[VCThird alloc] init];//推入第三个视图控制器对象[self.navigationController pushViewController: vcThird animated: YES];}- (void)pressBack {//将当前视图控制器弹出返回到上一级界面[self.navigationController popViewControllerAnimated: YES]; }/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end #import VCThird.hinterface VCThird ()endimplementation VCThird- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor colorWithRed: 0.7 green: 0.2 blue: 0.5 alpha: 1];self.title 亚非;UIBarButtonItem *btnLeft [[UIBarButtonItem alloc] initWithTitle: 返回上一级 style: UIBarButtonItemStylePlain target: self action: selector(pressBack)];self.navigationItem.leftBarButtonItem btnLeft;UIBarButtonItem btnRight [[UIBarButtonItem alloc] initWithTitle: 返回根视图 style: UIBarButtonItemStylePlain target: self action: selector(pressRoot)];self.navigationItem.rightBarButtonItem btnRight; }- (void)pressBack {//将当前视图控制器弹出,返回到上一级界面[self.navigationController popViewControllerAnimated: YES]; }- (void)pressRoot {//将当前视图弹出并返回根视图[self.navigationController popToRootViewControllerAnimated: YES]; }/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end#import SceneDelegate.h #import VCRoot.hinterface SceneDelegate ()endimplementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {self.window.frame [UIScreen mainScreen].bounds;//在这里创建了一个根视图控制器直接将这个根视图控制器赋值给了导航控制器的根视图对象然后这个导航控制器又作为了window的根视图控制器self.window.rootViewController [[UINavigationController alloc] initWithRootViewController: [[VCRoot alloc] init]];[self.window makeKeyAndVisible]; }- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see application:didDiscardSceneSessions instead). }- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive. }- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call). }- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background. }- (void)sceneDidEnterBackground:(UIScene )scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state. }end导航栏和工具栏 分栏控制器 有以下几个属性 UITabBarltem分栏按钮元素对象 badgeValue分栏按钮提示信息 selectedIndex分栏控制器选中的控制索引 viewControllers分栏控制器管理数组 selectedViewController分栏控制器选中的控制器对象 要注意的是在SceneDelegate中改了按钮的标题内容然后又在创建的视图控制器对象的.m文件中更改标题时应该在SceneDelegate中把会用到视图控制器对象的.m中的viewDidLoad函数的语句放在在SceneDelegate的标题赋值语句的后面因为如果不放在后面就会导致标题被覆盖无法更改为创建的视图控制器对象的标题内容 代码演示 首先需要创建三个视图控制器FirstVC、SecondVC、ThirdVC #import FirstVC.hinterface FirstVC ()endimplementation FirstVC- (void)viewDidLoad {[super viewDidLoad];UITabBarItem tabBarItem [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemSearchtag:101];self.tabBarItem tabBarItem;// Do any additional setup after loading the view. }/* #pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end #import SecondVC.hinterface SecondVC ()endimplementation SecondVC- (void)viewDidLoad {[super viewDidLoad];//根据系统风格设置分栏控制器按钮传入两个参数//第一个参数指分栏控制器的按钮风格第二个参数是分栏控件对象的标签值UITabBarItem tabBarItem [[UITabBarItem alloc] initWithTabBarSystemItem: UITabBarSystemItemContacts tag: 103];//为分栏按钮设置提示的标记值信息是系统的无法变更tabBarItem.badgeValue 99;self.tabBarItem tabBarItem;}/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end#import ThirdVC.hinterface ThirdVC ()endimplementation ThirdVC- (void)viewDidLoad {[super viewDidLoad];UITabBarItem tabBarItem [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFavoritestag: 103];//为分栏按钮设置提示的标记值信息是系统的无法变更tabBarItem.badgeValue 99;self.tabBarItem tabBarItem;// Do any additional setup after loading the view. }/ #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation
• (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {// Get the new view controller using [segue destinationViewController].// Pass the selected object to the new view controller. } */end#import SceneDelegate.h #import FirstVC.h #import SecondVC.h #import ThirdVC.hinterface SceneDelegate ()endimplementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {//创建三个视图控制器并更改背景颜色和标题FirstVC *vc1 [[FirstVC alloc] init];vc1.title 视图1;SecondVC *vc2 [[SecondVC alloc] init];vc2.title 视图2;ThirdVC *vc3 [[ThirdVC alloc] init];vc3.title 视图3;vc1.view.backgroundColor [UIColor brownColor];vc2.view.backgroundColor [UIColor orangeColor];vc3.view.backgroundColor [UIColor yellowColor];//创建分栏控制器对象UITabBarController *tbc [[UITabBarController alloc] init];//创建一个控制器数组对象并将所有要被分栏控制器管理的对象添加进数组//分栏控制器的按钮的位置就取决于在数组中存放的位置NSArray *arrVC [NSArray arrayWithObjects: vc1, vc2, vc3, nil];//将分栏控制器管理数组赋值tbc.viewControllers arrVC;//将分栏控制器做为根视图控制器self.window.rootViewController tbc;//设置选中的视图控制器的索引//通过索引来确定一打开程序的时候是显示的哪一个视图控制器并且此时分栏控制器选中的控制器对象就是索引为2的视图控制器tbc.selectedIndex 2;//分栏控制器选中的控制器对象if (tbc.selectedViewController vc3) {NSLog(分栏控制器选中的控制器对象是索引为2的视图控制器);}//设置分栏控制器的工具栏的透明度tbc.tabBar.translucent NO;//设置分栏控制器工具栏的背景颜色tbc.tabBar.backgroundColor [UIColor whiteColor];//设置分栏控制器工具栏的按钮选择时颜色tbc.tabBar.tintColor [UIColor redColor];}- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see application:didDiscardSceneSessions instead). }- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive. }- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call). }- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background. }- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state. }end分栏控制器高级 一些方法 willBeginCustomizingViewControllers:即将显示编辑方法 willEndCustomizingViewControllers:即将结束编辑方法 didEndCustomizingViewControllers:已经结束编辑方法 didSelectViewController:选中控制器切换方法 在给分栏控件添加按钮的时候为了用户体验下面页面最多显示五个按钮当添加的按钮多于五个的时候系统就会自动把最后一个按钮替换成“more”然后点开more才能看见被折叠的其他按钮。然后在点开more后的页面中的右上角会有一个edit按钮这个按钮点开后会出现我们创建的全部视图拖动上面的任意视图到下面的分栏视图中可以交换被折叠和被显示的那两个视图 UITabBarControllerDelegate协议 为了实现UITabBarControllerDelegate协议要在SceneDelegate.h中先引用该协议 代码演示 在此之前需要创建六个视图控制器FirstViewController、SecondViewController、ThirdViewController、ForthViewController、FifthViewController、sixthViewController 然后在在SceneDelegate.m中 #import SceneDelegate.h #import FirstViewController.h #import SecondViewController.h #import ThirdViewController.h #import ForthViewController.h #import FifthViewController.h #import SixthViewController.hinterface SceneDelegate ()endimplementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {FirstViewController *vc1 [[FirstViewController alloc] init];SecondViewController *vc2 [[SecondViewController alloc] init];ThirdViewController *vc3 [[ThirdViewController alloc] init];ForthViewController *vc4 [[ForthViewController alloc] init];FifthViewController *vc5 [[FifthViewController alloc] init];sixthViewController *vc6 [[sixthViewController alloc] init];vc1.title 视图1;vc2.title 视图2;vc3.title 视图3;vc4.title 视图4;vc5.title 视图5;vc6.title 视图6;vc1.view.backgroundColor [UIColor redColor];vc2.view.backgroundColor [UIColor orangeColor];vc3.view.backgroundColor [UIColor yellowColor];vc4.view.backgroundColor [UIColor greenColor];vc5.view.backgroundColor [UIColor blueColor];vc6.view.backgroundColor [UIColor purpleColor];NSArray *arrVC [NSArray arrayWithObjects: vc1, vc2, vc3, vc4, vc5, vc6, nil];UITabBarController *btc [[UITabBarController alloc] init];btc.viewControllers arrVC;self.window.rootViewController btc;//处理UITabBarControllerDelegate协议函数//设置代理btc.delegate self; }//以下是协议中函数的用法其中“编辑”是指在分栏控制器中的more中通过拖动更改和交换显示和折叠的视图控制器的操作———————————————————— //即将开始编辑前会调用此协议函数
• (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers {NSLog(编辑前); }//即将结束前调用该协议函数
• (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed {NSLog(即将结束前); }//已经结束编辑时调用该协议函数
• (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed {if (changed YES) {NSLog(顺序发生改变);}NSLog(已经结束编辑); }//选中控制器对象时调用该协议函数
• (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { // if (tabBarController.viewControllers[tabBarController.selectedIndex] viewController) { // NSLog(选中的视图索引与当前传入的视图索引相同); // }NSLog(选中控制器对象); }- (void)sceneDidDisconnect:(UIScene *)scene {// Called as the scene is being released by the system.// This occurs shortly after the scene enters the background, or when its session is discarded.// Release any resources associated with this scene that can be re-created the next time the scene connects.// The scene may re-connect later, as its session was not necessarily discarded (see application:didDiscardSceneSessions instead). }- (void)sceneDidBecomeActive:(UIScene *)scene {// Called when the scene has moved from an inactive state to an active state.// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive. }- (void)sceneWillResignActive:(UIScene *)scene {// Called when the scene will move from an active state to an inactive state.// This may occur due to temporary interruptions (ex. an incoming phone call). }- (void)sceneWillEnterForeground:(UIScene *)scene {// Called as the scene transitions from the background to the foreground.// Use this method to undo the changes made on entering the background. }- (void)sceneDidEnterBackground:(UIScene *)scene {// Called as the scene transitions from the foreground to the background.// Use this method to save data, release shared resources, and store enough scene-specific state information// to restore the scene back to its current state. }end多界面传值 在 iOS 开发中多界面之间传值数据传递是非常常见的场景比如 登录页把用户名传到个人中心页 设置页把用户修改的偏好设置返回给主界面 从商品列表点进详情页传递商品信息 在这里附上学长总结的博客
  iOS多界面传值_ios navigationcontroller 隔层页面传值-CSDN博客 UITableView 这部分是UI中的重中之重。 UITableView是iOS开发中的一个控件用于展示列表数据。它类似于HTML中的表格但更加强大和灵活。UITbleView可以支持滚动、选中、插入、删除等操作并且可以高度自定义。 1创建UITableView实例 2设置UITableView的delegate和dataSource 3实现UITableViewDelegate和UITableViewDataSource协议中的方法 4将UITableView添加到视图中。