沈阳军成网站建设,天台做网站,小红书怎么推广自己的产品,宁波seo快速优化教程UI学习#xff08;二#xff09; 文章目录 UI学习#xff08;二#xff09;布局子视图手动布局自动布局 导航控制器导航控制器基础导航控制器的切换导航栏工具栏 分栏控制器分栏控制器协议部分的内容UITableView基础部分相关的协议函数高级协议与单元格 多界面传值 布局子视…UI学习二 文章目录 UI学习二布局子视图手动布局自动布局 导航控制器导航控制器基础导航控制器的切换导航栏工具栏 分栏控制器分栏控制器协议部分的内容UITableView基础部分相关的协议函数高级协议与单元格 多界面传值 布局子视图
手动布局
这里我要实现的目的是当我们想让父视图变化的时候使子视图也随着进行相应的变化的时候我们就可以采用这两种方法。
#import UIKit/UIKit.h
interface ViewController ()endimplementation ViewController- (void)viewDidLoad {[super viewDidLoad];SuperView* sView [[SuperView alloc] init];//创建一个子视图sView.frame CGRectMake(20, 20, 100, 200);[sView creatSubView];sView.backgroundColor [UIColor blueColor];[self.view addSubview:sView];UIButton* btn [UIButton buttonWithType:UIButtonTypeRoundedRect];//设置一个按钮btn.frame CGRectMake(240, 480, 80, 40);[btn setTitle:放大 forState:UIControlStateNormal];[btn addTarget:self action:selector(pressLarge) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:btn];UIButton* btn1 [UIButton buttonWithType:UIButtonTypeRoundedRect];btn1.frame CGRectMake(240, 520, 80, 40);[btn1 setTitle:缩小 forState:UIControlStateNormal];[btn1 addTarget:self action:selector(pressSmall) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:btn1];sView.tag 101;// Do any additional setup after loading the view.
}
-(void) pressLarge {SuperView* sView (SuperView*)[self.view viewWithTag:101];[UIView animateWithDuration: 1.0 animations:^{sView.frame CGRectMake(20, 20, 300, 480);}];
}
-(void) pressSmall {SuperView* sView (SuperView*)[self.view viewWithTag:101];//通过tag获取到图片的值[UIView animateWithDuration: 1.0 animations:^{sView.frame CGRectMake(20, 20, 180, 280);}];//现在使用一个新的方法我们的animation执行写在里面的代码块。
}endNS_ASSUME_NONNULL_BEGINinterface SuperView : UIView {UIView* _view1;UIView* _view2;UIView* _view3;UIView* _view4;UIView* _view5;
}
-(void) creatSubView;
endNS_ASSUME_NONNULL_END
implementation SuperView
-(void) creatSubView {//设置四个视图_view1 [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];_view2 [[UIView alloc] initWithFrame:CGRectMake(self.bounds.size.width - 40, 0, 40, 40)];_view3 [[UIView alloc] initWithFrame:CGRectMake(self.bounds.size.width - 40, self.bounds.size.height - 40, 40, 40)];_view4 [[UIView alloc] initWithFrame:CGRectMake(0, self.bounds.size.height - 40, 40, 40)];_view1.backgroundColor [UIColor orangeColor];_view2.backgroundColor [UIColor orangeColor];_view3.backgroundColor [UIColor orangeColor];_view4.backgroundColor [UIColor orangeColor];[self addSubview:_view1];[self addSubview:_view2];[self addSubview:_view3];[self addSubview:_view4];
}
//layoutSubviews是UIView类的一个方法用于对子视图进行布局和调整。当视图的布局需要更新时系统会自动调用layoutSubviews方法。
//当视图的frame属性发生变化时例如视图的大小或位置发生改变。
//当视图的bounds属性发生变化时例如视图的内容区域发生改变。
//当视图的transform属性发生变化时例如视图进行缩放、旋转等变换操作。
-(void)layoutSubviews {[UIView animateWithDuration: 1.0 animations:^{self-_view1.frame CGRectMake(0, 0, 40, 40);self-_view2.frame CGRectMake(self.bounds.size.width - 40, 0, 40, 40);self-_view3.frame CGRectMake(self.bounds.size.width - 40, self.bounds.size.height - 40, 40, 40);self-_view4.frame CGRectMake(0, self.bounds.size.height - 40, 40, 40);}];
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {// Drawing code
}
*/end实现的一个效果 自动布局
我们也可以直接使用OC语言中提供的方法直接实现一个改变父视图的同时改变子视图。
#import ViewController.hinterface ViewController ()endimplementation ViewController- (void)viewDidLoad {[super viewDidLoad];_superView [[UIView alloc] initWithFrame:CGRectMake(20, 29, 180, 280)];_superView.backgroundColor [UIColor blueColor];_label1 [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];_label1.text 1;_label1.backgroundColor [UIColor orangeColor];_label2 [[UILabel alloc] initWithFrame:CGRectMake(180 - 40, 0, 40, 40)];_label2.text 2;_label2.backgroundColor [UIColor orangeColor];_label3 [[UILabel alloc] initWithFrame:CGRectMake(180 - 40, 280 - 40, 40, 40)];_label3.text 3;_label3.backgroundColor [UIColor orangeColor];_label4 [[UILabel alloc] initWithFrame:CGRectMake(0, 280 - 40, 40, 40)];_label4.text 4;_label4.backgroundColor [UIColor orangeColor];// Do any additional setup after loading the view.[_superView addSubview:_label1];[_superView addSubview:_label2];[_superView addSubview:_label3];[_superView addSubview:_label4];[self.view addSubview: _superView];_viewCenter [[UIView alloc] initWithFrame:CGRectMake(0, 0, _superView.bounds.size.width, 40)];_viewCenter.center CGPointMake(180 / 2, 280 / 2);_viewCenter.backgroundColor [UIColor orangeColor];[_superView addSubview: _viewCenter];//设置自动布局的属性_viewCenter.autoresizingMask UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;//自动调整到Width自动调整对于顶部的距离自动调整对于底部的距离_label2.autoresizingMask UIViewAutoresizingFlexibleLeftMargin;_label3.autoresizingMask UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin;_label4.autoresizingMask UIViewAutoresizingFlexibleTopMargin;
}
-(void)touchesBegan:(NSSetUITouch * *)touches withEvent:(UIEvent *)event {static BOOL isLarge NO;//设置一个变量来控制这一次是变大还是变小[UIView animateWithDuration: 1.0 animations:^ {if (isLarge NO) {self-_superView.frame CGRectMake(10, 10, 350, 580);isLarge YES;} else {self-_superView.frame CGRectMake(20, 20, 180, 280);isLarge NO;}}];
}end
实现的效果 导航控制器
导航控制器(UINavigationController)是一种非常常用的容器视图控制器。它负责管理一个视图控制器的层次结构,提供导航栏、返回按钮等功能,让用户能够方便地在应用程序的各个页面之间进行导航这里主要讲解一下有关导航控制器的使用。
导航控制器基础
#import SceneDelegate.hinterface SceneDelegate ()endimplementation SceneDelegate- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {self.window.frame [UIScreen mainScreen].bounds;VCRoot* vc [[VCRoot alloc] init];//创建导航控制器用于管理多个视图控制器的切换//采用层级的方式来管理多个视图的一个切换//创建的时候一定要有一个根视图控制器UINavigationController* nav [[UINavigationController alloc] initWithRootViewController:vc];//设置一个根视图self.window.rootViewController nav;[self.window makeKeyAndVisible];// Use this method to optionally configure and attach the UIWindow window to the provided UIWindowScene scene.// If using a storyboard, the window property will automatically be initialized and attached to the scene.// This delegate does not imply the connecting scene or session are new (see application:configurationForConnectingSceneSession instead).
}- (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
这里有关根视图部分的代码
#import VCRoot.hinterface VCRoot ()endimplementation VCRoot- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor yellowColor];self.title 根视图;//设置为一个标题内容,如果没设置下面的就显示上面的否则显示下面的self.navigationItem.title title;//p1按钮上的文字//p2按钮风格//p3事件持有者//p4按钮事件UIBarButtonItem* leftBtn [[UIBarButtonItem alloc] initWithTitle:左侧 style:UIBarButtonItemStyleDone target:self action:selector(pressleft)];//将导航元素项左侧按钮赋值self.navigationItem.leftBarButtonItem leftBtn;//根据系统风格来创建按钮系统风格的按钮内容或标题文字不能改变UIBarButtonItem *rightBtn [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFastForward target: self action: selector(pressRight)];self.navigationItem.rightBarButtonItem rightBtn;UILabel* label [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 50, 40)];label.text text;label.textAlignment NSTextAlignmentCenter;label.textColor [UIColor blueColor];//将任何类型的控件添加到导航按钮的方法UIBarButtonItem * item3 [[UIBarButtonItem alloc] initWithCustomView:label];//创建一个按钮数组NSArray* arryBtn [NSArray arrayWithObjects:item3, rightBtn, nil];//元素顺序决定如何呈现的//将右侧按钮数组赋值 self.navigationItem.rightBarButtonItems arryBtn;// 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.
}
*/
- (void) pressleft {NSLog(left);
}
- (void) pressRight {NSLog(right);
}
end
实现的效果 导航控制器的切换
这里就涉及到我们从一个界面推出到另一个界面的问题这里有一个视图控制器堆栈的事情我们需要了解一下这个视图控制器堆栈。
导航控制器维护一个视图控制器的栈结构,用于管理应用程序的导航层次。用户在应用程序中导航时,新的视图控制器会被压入栈中,返回时则从栈中弹出。
我们主要通过两种方法来操控这部分内容
pushViewController:animated: 将一个视图控制器压入栈顶popViewController:animated: 将一个栈顶的视图控制器退出出这个栈中
#import VCRoot.h
#import VCSecond.h
interface VCRoot ()endimplementation VCRoot- (void)viewDidLoad {[super viewDidLoad];//设置透明度,yes透明no不透明self.navigationController.navigationBar.translucent YES;self.title title;self.navigationItem.title 根视图;self.view.backgroundColor [UIColor blueColor];//设置导航栏的风格默认为Defaultself.navigationController.navigationBar.barStyle UIBarStyleDefault;UIBarButtonItem* next [[UIBarButtonItem alloc] initWithTitle:下一级别 style:UIBarButtonItemStylePlain target:self action:selector(pressRight)];self.navigationItem.rightBarButtonItem next;// Do any additional setup after loading the view.
}
#import VCThird.hinterface VCThird ()endimplementation VCThird- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor redColor];UIBarButtonItem* btnleft [[UIBarButtonItem alloc] initWithTitle:返回 style:UIBarButtonItemStylePlain target:self action:selector(press)];self.navigationItem.rightBarButtonItem btnleft;// Do any additional setup after loading the view.
}
-(void) press {//弹回根视图[self.navigationController popToRootViewControllerAnimated:YES];
}#import VCSecond.h
#import VCThird.h
interface VCSecond ()endimplementation VCSecond- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor greenColor];UIBarButtonItem* btnNext [[UIBarButtonItem alloc] initWithTitle:next style:UIBarButtonItemStylePlain target:self action:selector(press)];self.navigationItem.rightBarButtonItem btnNext;// Do any additional setup after loading the view.
}
- (void)press {VCThird* vc [[VCThird alloc] init];[self.navigationController pushViewController:vc animated:YES];
}这部分代码我们只是简单的设置了一下从一个视图控制器中推出另一个视图控制器
实现的效果为 导航栏
在新的iOS中我们对于导航栏要使用UINavigationBarAppearance* apperance来设置我们的一个导航栏的样式
- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor yellowColor];//在iOS13之后我们需要通过下面的方式来设置空间外观样式UINavigationBarAppearance* apperance [[UINavigationBarAppearance alloc] init];//设置该对象的背景风格apperance.backgroundColor [UIColor whiteColor];//背景颜色apperance.shadowImage [[UIImage alloc] init];//阴影图像apperance.shadowColor nil;//阴影颜色self.title title;//设置按钮的颜色self.navigationController.navigationBar.tintColor [UIColor purpleColor];//设置普通样式的导航栏self.navigationController.navigationBar.standardAppearance apperance;//设置滚动样式的导航栏self.navigationController.navigationBar.scrollEdgeAppearance apperance;//隐藏导航栏的两个方法//1、下面这一条的hidden是继承于UIView的self.navigationController.navigationBar.hidden NO;//2、下面这一条的navigationBarHidden是一个属性self.navigationController.navigationBarHidden NO;// Do any additional setup after loading the view.
}工具栏
/显示工具栏对象//隐藏工具栏默认为YES即隐藏NO不隐藏self.navigationController.toolbarHidden NO;//设置工具栏是否透明默认为YES半透明self.navigationController.toolbar.translucent NO;UIBarButtonItem *btn1 [[UIBarButtonItem alloc] initWithTitle: left style: UIBarButtonItemStylePlain target: nil action: nil];UIBarButtonItem *btn2 [[UIBarButtonItem alloc] initWithTitle: right style: UIBarButtonItemStylePlain target: self action: selector(press)];//设置一个自定义类型的button,使用图片创建UIButton *btnC [UIButton buttonWithType: UIButtonTypeCustom];[btnC setImage: [UIImage imageNamed: 1.jpg] forState: UIControlStateNormal];btnC.frame CGRectMake(0, 0, 60, 60);UIBarButtonItem *btn3 [[UIBarButtonItem alloc] initWithCustomView: btnC];//设置一个占位按钮放到数组中可以用来分隔开各按钮//设置宽度固定的占位按钮,注此处方法名为UIBarButtonSystemItemFixedSpaceFixedSpaceUIBarButtonItem *btnF1 [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFixedSpace target: nil action: nil];btnF1.width 110;UIBarButtonItem *btnF2 [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target: nil action: nil];NSArray *arrayBtn [NSArray arrayWithObjects: btn1, btnF2, btn3, btnF2, btn2, nil];self.toolbarItems arrayBtn;实现的效果为
分栏控制器
分栏控制器(UITabBarController)是另一种常用的容器视图控制器分栏控制器可以包含多个子视图控制器,并通过底部的分栏菜单(UITabBar)进行切换。
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {self.window.frame [UIScreen mainScreen].bounds;[self.window makeKeyAndVisible];VCFirst* vc1 [[VCFirst alloc] init];VC_Second* vc2 [[VC_Second alloc] init];VCThrid* vc3 [[VCThrid alloc] init];vc1.view.backgroundColor [UIColor orangeColor];vc2.view.backgroundColor [UIColor blueColor];vc3.view.backgroundColor [UIColor greenColor];vc1.title first;vc2.title second;vc3.title third;UITabBarController* tbContoller [[UITabBarController alloc] init];NSArray* arrayVC [vc1, vc2, vc3];//决定下面按钮的一个顺序tbContoller.viewControllers arrayVC;tbContoller.tabBar.translucent NO;//设置工具栏的透明度tbContoller.tabBar.backgroundColor [UIColor whiteColor];//设置背景颜色tbContoller.tabBar.tintColor [UIColor redColor];//设置一下按钮的self.window.rootViewController tbContoller;tbContoller.selectedIndex 2;//设置初始化时候显示的一个视图控制器NSLog(%d, tbContoller.selectedViewController vc3);//将分栏控制器作为跟视图// Use this method to optionally configure and attach the UIWindow window to the provided UIWindowScene scene.// If using a storyboard, the window property will automatically be initialized and attached to the scene.// This delegate does not imply the connecting scene or session are new (see application:configurationForConnectingSceneSession instead).
}
实现的效果为 分栏控制器协议部分的内容
这部分内容主要是有关** UITabBarControllerDelegate**这个协议实现的相关函数主要是因为当我们的视图多于5个时候他增加一个按钮也就是more按钮这个按钮然后有编辑呈现在页面上的五个视图的顺序。
(void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers 在编辑前(void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed //编辑即将结束-(void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed //编辑结束-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController //选中了那个视图控制器
这四个是协议里的相关函数
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {self.window.frame [UIScreen mainScreen].bounds;[self.window makeKeyAndVisible];VCFirst *vcFirst [[VCFirst alloc] init];VCSecond *vcSecond [[VCSecond alloc] init];VCThird *vcThird [[VCThird alloc] init];VCFourth *vcFourth [[VCFourth alloc] init];VCFifth *vcFifth [[VCFifth alloc] init];VCSixth *vcSixth [[VCSixth alloc] init];// 设置视图控制器的背景颜色vcFirst.view.backgroundColor [UIColor redColor];vcSecond.view.backgroundColor [UIColor orangeColor];vcThird.view.backgroundColor [UIColor yellowColor];vcFourth.view.backgroundColor [UIColor greenColor];vcFifth.view.backgroundColor [UIColor blueColor];vcSixth.view.backgroundColor [UIColor purpleColor];vcFirst.title 第一页;vcSecond.title 第二页;vcThird.title 第三页;vcFourth.title 第四页;vcFifth.title 第五页;vcSixth.title 第六页;NSArray* ary [vcFirst, vcSecond, vcThird, vcFourth, vcFifth, vcSixth];UITabBarController* tabContoller [[UITabBarController alloc] init];tabContoller.viewControllers ary;tabContoller.tabBar.translucent NO;tabContoller.tabBar.backgroundColor [UIColor whiteColor];tabContoller.tabBar.tintColor [UIColor redColor];self.window.rootViewController tabContoller;//设置代理tabContoller.delegate self;// Use this method to optionally configure and attach the UIWindow window to the provided UIWindowScene scene.// If using a storyboard, the window property will automatically be initialized and attached to the scene.// This delegate does not imply the connecting scene or session are new (see application:configurationForConnectingSceneSession instead).
}
- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers {NSLog(编辑器前);
}
- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed {NSLog(即将结束前);
}
-(void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray__kindof UIViewController * *)viewControllers changed:(BOOL)changed {if (changed YES) {NSLog(顺序改变);}NSLog(结束编辑);
}
-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {NSLog(选中控制器对象);
}实现的一个效果 控制台打印结果 UITableView
基础部分 这个UI组件是非常重要的一个组件在实际开发中有非常重要的作用这里只做简单介绍后面笔者会单独总结一下这部分的内容 在创建UITableView这个组件的时候他的步骤比较多。这里来介绍一下他的相关步骤 首先要继承两个协议UITableViewDelegate, UITableViewDataSource 设置两个代理_tableView.delegate self; _tableView.dataSource self; 实现协议中必须实现的三个协议函数1、-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section获取每组元素的个数2、numberOfSectionsInTableView设置数据视图的组数3、tableView: cellForRowAtIndexPath创建单元格对象函数
#import ViewController.hinterface ViewController ()endimplementation ViewController- (void)viewDidLoad {[super viewDidLoad];_tableView [[UITableView alloc] initWithFrame:self.view.bounds style: UITableViewStyleGrouped];//设置两个代理_tableView.delegate self;_tableView.dataSource self;[self.view addSubview:_tableView];// Do any additional setup after loading the view.
}
//获取每组元素的个数
//必须要实现的协议函数
//程序在显示数据视图会调用次函数
//p1:数据视图对象本身
//p2:那一组需要的行数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {return 5;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {return 3;
}
-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {NSString* cellStr cell;UITableViewCell* cell [tableView dequeueReusableCellWithIdentifier:cellStr];if (cell nil) {//创建一个单元格//参数一单元格样式//参数二单元格的复用标记cell [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellStr];}NSString* str [NSString stringWithFormat:第%ld行第%ld列, indexPath.section, indexPath.row];//单于格的主文字部分cell.textLabel.text str;return cell;}end
实现效果 相关的协议函数
这里我们可以通过相应的协议函数来修改单元格的样式来满足我们的
-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section-(CGFloat) tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section-(NSString*) tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section-(NSString*) tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section
实现效果 高级协议与单元格
这部分重要的协议函数是
-(void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 选中单元格(void) tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath 取消选中单元格tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath 编辑单元格
- (void)viewDidLoad {[super viewDidLoad];[self creatBtn];_tableView [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];_tableView.autoresizingMask UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;_tableView.delegate self;_tableView.dataSource self;_tableView.tableHeaderView nil;_tableView.tableFooterView nil;[self.view addSubview:_tableView];_arryData [[NSMutableArray alloc] init];for (int i 1; i 20; i) {NSString* str [NSString stringWithFormat:A %d, i];[_arryData addObject:str];}//当数据的数据源发生变化时候//跟新数据视图重新加载数据[_tableView reloadData];}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {return _arryData.count;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {return 1;
}
-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {NSString* str ID;UITableViewCell* cell [tableView dequeueReusableCellWithIdentifier:str];//尝试获取可复用的单元格//有足够多的单元格if (cell nil) {cell [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:str];}cell.textLabel.text [_arryData objectAtIndex:indexPath.row];cell.detailTextLabel.text 子标题;NSString* str1 [NSString stringWithFormat:1.jpg];UIImage* image [UIImage imageNamed:str1];cell.imageView.image image;return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {return 60;
}
-(void) creatBtn {_isEdit NO;_btnEdit [[UIBarButtonItem alloc] initWithTitle:编辑 style:UIBarButtonItemStylePlain target:self action:selector(press1)];_btnDelete [[UIBarButtonItem alloc] initWithTitle:删除 style:UIBarButtonItemStylePlain target:self action:selector(press2)];_btnFinish [[UIBarButtonItem alloc] initWithTitle:完成 style:UIBarButtonItemStylePlain target:self action:selector(press3)];self.navigationItem.rightBarButtonItem _btnEdit;
}
-(void)press1 {_isEdit YES;self.navigationItem.rightBarButtonItem _btnFinish;[_tableView setEditing:YES];self.navigationItem.leftBarButtonItem _btnDelete;
}
-(void)press2 {}
//显示编辑状态当手指在单元格上移动时候
-(void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {[_arryData removeObjectAtIndex:indexPath.row];[tableView reloadData];NSLog(delete);
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {NSLog(选中单元格,%ld,%ld, indexPath.section,indexPath.row);
}
-(void) tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {NSLog(取消选中,%ld,%ld, indexPath.section, indexPath.row);
}
//单元格显示效果协议
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {return UITableViewCellEditingStyleDelete;//插入状态//默认为删除UITableViewCellEditingStyleDelete//默认为删除UITableViewCellEditingStyleNone//UITableViewCellEditingStyleDelete | UITableViewCellEditingStyleInsert;多选
}
-(void)press3 {_isEdit YES;self.navigationItem.rightBarButtonItem _btnEdit;[_tableView setEditing:NO];self.navigationItem.leftBarButtonItem nil;
}
end
实现的效果 多界面传值
这里主要是通过一个协议传值的方式去实现两个界面的传值
代码实现
#import UIKit/UIKit.h
#import ViewSecond.h
NS_ASSUME_NONNULL_BEGINinterface ViewFirst : UIViewControllerVCSecondDelegate
-(void) changeColor:(UIColor*) color;
endNS_ASSUME_NONNULL_END
#import ViewFirst.hinterface ViewFirst ()endimplementation ViewFirst- (void)viewDidLoad {[super viewDidLoad];self.title 根视图;self.view.backgroundColor [UIColor orangeColor];self.navigationController.navigationBar.translucent NO;UINavigationBarAppearance* app [[UINavigationBarAppearance alloc] init];app.backgroundColor [UIColor whiteColor];app.shadowImage [[UIImage alloc] init];app.shadowColor nil;self.navigationController.navigationBar.standardAppearance app;self.navigationController.navigationBar.scrollEdgeAppearance app;// Do any additional setup after loading the view.
}
- (void)touchesBegan:(NSSetUITouch * *)touches withEvent:(UIEvent *)event {ViewSecond* vc [[ViewSecond alloc] init];//作为一个代理来传值vc.delegate self;[self.navigationController pushViewController:vc animated:YES];
}
-(void)changeColor:(UIColor *)color {self.view.backgroundColor color;
}
/*
#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
第二个界面
NS_ASSUME_NONNULL_BEGIN
//定义代理协议视图控制器二的协议
protocol VCSecondDelegate NSObject
-(void) changeColor:(UIColor*) color;
endinterface ViewSecond : UIViewController
//定义一个协议函数改变背景颜色
property (nonatomic, assign) NSInteger tag;
property (nonatomic, weak) idVCSecondDelegate delegate;
end#import ViewSecond.hinterface ViewSecond ()endimplementation ViewSecond- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor [UIColor redColor];UIBarButtonItem* btnChange [[UIBarButtonItem alloc] initWithTitle:改变颜色 style:UIBarButtonItemStyleDone target:self action:selector(pressbtn)];self.navigationItem.rightBarButtonItem btnChange;// Do any additional setup after loading the view.
}
-(void) pressbtn {[_delegate changeColor:[UIColor purpleColor]];
}
/*
#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
实现效果
