Appdelegate中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; //1.创建单视图控制器对象, FirstViewController *firstVC = [[FirstViewController alloc] init]; //2.创建导航控制器,并且知道那个导航控制器的根视图控制器 //0 64 UINavigationController *navigatinVC = [[UINavigationController alloc] initWithRootViewController:firstVC]; //3.将 导航控制器 作为window的根视图控制器 self.window.rootViewController = navigatinVC; //4.释放 [firstVC release]; [navigatinVC release]; self.window.backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; return YES; }
FirstViewController
#import "FirstViewController.h" #import "SecondViewController.h" #import "Singleton.h" //代理传值第四步:服从协议 @interface FirstViewController () <SecondViewControllerdelegate> @end /** * 导航控制器的工作原理 导航控制器以栈的形式管理视图控制器,当进入下一界面时,该视图控制器入栈,当返回上一界面时,该视图控制器出栈,入栈前,视图控制器开辟空间,出栈后,视图控制器空间被系统回收,屏幕用于显示的是导航控制器的栈顶元素 */ @implementation FirstViewController #pragma mark --second view controller delegate //代理传值第五步;前一个界面实现协议中的方法 - (void)passValue:(NSString *)data { UILabel * label = (UILabel *)[self.view viewWithTag:200]; label.text = data; //NSString *dd = [[(UILabel *)[self.view viewWithTag:200]] text]; } #pragma mark -self.view /* //将要出现 - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; } //已经出现 - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; // NSLog(@"%s, %d", __FUNCTION__, __LINE__); // NSLog(@"superView--%@",self.view.superview); } //将要消失 - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; // NSLog(@"%s, %d", __FUNCTION__, __LINE__); } //已经消失 - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; //NSLog(@"%s, %d", __FUNCTION__, __LINE__); } */ /** * 界面键传值之一:从前往后传 葵花宝典:属性传值 招式一:在后一个界面定义属性(属性的类型,要和传输数据的类型一致) 招式二:在从前一个界面进入下一个界面之前,将数据传给下一界面. */ - (void)viewDidLoad { NSLog(@"%s, %d", __FUNCTION__, __LINE__); NSLog(@"superView--%@",self.view.superview); [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor redColor]; //进入下一界面 button [self setupButton]; [self configureNavigationBarCommonPropety]; //[self customizationNavigationBarContent]; //修改导航条上显示的文字的大小和颜色(针对所有界面统一设置) // NSDictionary *dic = @{NSForegroundColorAttributeName:[UIColor redColor],NSFontAttributeName:[UIFont systemFontOfSize:20]}; // self.navigationController.navigationBar.titleTextAttributes = dic; // [self setTextField]; // [self showNextlabel]; } - (void)setTextField{ UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 250, 280, 40)]; // textField.backgroundColor = [UIColor blueColor]; //设置tag textField.tag = 100; textField.borderStyle = UITextBorderStyleRoundedRect; textField.placeholder = @"请输入内容让下一个界面显示"; [self.view addSubview:textField]; [textField release]; } - (void)showNextlabel{ UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 310, 280, 40)]; label.tag = 200; label.backgroundColor = [UIColor blueColor]; label.text = @"显示下一个文本内容"; [self.view addSubview:label]; [label release]; } //单独定制导航条 - (void)customizationNavigationBarContent{ //1.配置导航条显示的文字 self.navigationItem.title = @"第一个界面"; //2.配置导航条的titleView UISegmentedControl *segmentCont = [[UISegmentedControl alloc] initWithItems:@[@"消息",@"通话"]]; self.navigationItem.titleView = segmentCont; [segmentCont release]; //左侧部分 //3.配置Left UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:@selector(handleLeftBarButtonAction:)]; self.navigationItem.leftBarButtonItem = leftBarButtonItem; [leftBarButtonItem release]; //配置右侧部分 UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(handleRightBarButtonAction:)]; self.navigationItem.rightBarButtonItem = rightBarButtonItem; [rightBarButtonItem release]; } #pragma mark - handle left bar button action - (void)handleLeftBarButtonAction:(UIBarButtonItem *)barItem { NSLog(@"点击了左侧!"); } - (void)handleRightBarButtonAction:(UIBarButtonItem *)barItem { NSLog(@"点击了右侧!"); } //配置导航条,配置完成之后所有界面的导航条效果一样 - (void)configureNavigationBarCommonPropety{ //1.修改导航条的颜色 self.navigationController.navigationBar.backgroundColor = [UIColor grayColor]; //2.修改导航条的渲染颜色 self.navigationController.navigationBar.tintColor = [UIColor orangeColor]; //3.关闭导航条的毛玻璃效果 //self.navigationController.navigationBar.translucent = YES; //当关闭导航条毛玻璃效果之后,导航控制器的contentView向下偏移64 //4.影藏导航条 self.navigationController.navigationBar.hidden = NO; //5.设置导航图片 /** * 图片尺寸小于44 或者大于44小于64,图片平铺显示到状态条和导航条 当图片尺寸等于44时,图片只会显示在导航条 当图片尺寸等于64时,图片会显示在状态和导航条上 */ [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"32030.png"] forBarMetrics:UIBarMetricsDefault]; } - (void)setupButton{ UIButton *btnName =[UIButton buttonWithType:UIButtonTypeSystem]; btnName.frame = CGRectMake(20, 100, 280, 40); [btnName setTitle:@"进入下一界面" forState:UIControlStateNormal]; btnName.backgroundColor = [UIColor orangeColor]; [btnName addTarget:self action:@selector(handlePushBtn:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btnName]; } - (void)handlePushBtn:(UIButton *)button { //属性传值从前往后传 /* //1.创建第二个视图控制器对象 SecondViewController *secondVC = [[SecondViewController alloc] init]; //2.通过导航控制器push到下一个界面(视图控制器自带的 navigationContrller 属性能够获取到当前视图控制器的导航控制器,然后,通过导航控制器进行push) //第二个界面接收数据 secondVC.data = [(UITextField *)[self.view viewWithTag:100] text]; [self.navigationController pushViewController:secondVC animated:YES]; //3.释放 [secondVC release]; */ // //代理传值,从后往前传 // // //1.创建第二个视图控制器对象 // SecondViewController *secondVC = [[SecondViewController alloc] init]; // // //代理传值 第三步,给后一个界面,指定代理对象 // secondVC.delegate = self; // // //2.通过导航控制器push到下一个界面(视图控制器自带的 navigationContrller 属性能够获取到当前视图控制器的导航控制器,然后,通过导航控制器进行push) // // [self.navigationController pushViewController:secondVC animated:YES]; // //3.释放 // [secondVC release]; //单例传值 //1.创建第二个视图控制器对象 SecondViewController *secondVC = [[SecondViewController alloc] init]; //单例传值第三步 [Singleton mianSingleton].textFieldData = [(UITextField *)[self.view viewWithTag:100] text]; //2.通过导航控制器push到下一个界面(视图控制器自带的 navigationContrller 属性能够获取到当前视图控制器的导航控制器,然后,通过导航控制器进行push) [self.navigationController pushViewController:secondVC animated:YES]; //3.释放 [secondVC release]; } @end
SecondViewController.h中设置代理
#import <UIKit/UIKit.h> //代理传值第一步:定义协议 @protocol SecondViewControllerdelegate <NSObject> - (void)passValue:(NSString *)data; @end @interface SecondViewController : UIViewController //属性传值第一步:后一个界面定义属性 @property (nonatomic, copy)NSString *data; //代理传值 第二步:定义代理属性,存储代理 @property (nonatomic, assign) id<SecondViewControllerdelegate>delegate; @end
SecondViewController.m
#import "SecondViewController.h" #import "ThirdViewController.h" //延展 @interface SecondViewController () @end @implementation SecondViewController /** * 界面切换时,视图的变换过程 1.从前一个进入到下一个界面 A push B, 此时 方法的处罚顺序 A - viewWillDisappear ,B - viewWillAppear A- viewDidDisappear, B - viewDidAppear 2.从后一个界面返回到前一个界面 B pop A 此时的f方法触发顺序为B - viewWillDisappear ,A - viewWillAppear B- viewDidDisappear, A - viewDidAppear */ /* - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; NSLog(@"%s, %d", __FUNCTION__, __LINE__); } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; NSLog(@"%s, %d", __FUNCTION__, __LINE__); } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; NSLog(@"%s, %d", __FUNCTION__, __LINE__); } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; NSLog(@"%s, %d", __FUNCTION__, __LINE__); } */ /** * 界面间传值之二:从后往前传值 辟邪简谱:代理传值 (代理事前一个界面,协议在后一个界面写) 后一个界面是委托方,前一个界面是被委托方. 招式一:在后一个界面定义协议(定义一个用于传值的方法,而且方法必须要有参数,参数必须要与所传数据的类型保持一致) 招式二:在后一个界面定义代理属性,用来保存代理对象. 招式三:设置后一个界面的代理 ---- 在前一个界面,进入后一个界面之前,设置前一个界面为后一个代理. 招式四:前一个界面服从协议 招式五:前一个界面实现协议中的方法. 招式六:后一个界面让代理执行协议中的方法(执行方法是,把传输的数据作为方法的参数进行参数进行传递),时机:返回上一界面之前 */ - (void)viewDidLoad { NSLog(@"%s, %d", __FUNCTION__, __LINE__); [super viewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor yellowColor]; [self setupButton]; [self returnupButton]; [self customizationNavigationBarContent]; [self setTextField]; [self showNextlabel]; } - (void)setTextField{ UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 250, 280, 40)]; textField.backgroundColor = [UIColor blueColor]; textField.tag = 200; textField.placeholder = @"请输入内容让下一个界面显示"; [self.view addSubview:textField]; [textField release]; } - (void)showNextlabel{ UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 310, 280, 40)]; label.backgroundColor = [UIColor blueColor]; label.text = self.data; [self.view addSubview:label]; [label release]; } - (void)customizationNavigationBarContent{ //1.配置导航条显示的文字 self.navigationItem.title = @"第二个界面"; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (void)setupButton{ UIButton *btnName = [UIButton buttonWithType:UIButtonTypeSystem]; btnName.frame = CGRectMake(20, 100, 280, 40); [btnName setTitle:@"进入下一界面" forState:UIControlStateNormal]; btnName.backgroundColor = [UIColor orangeColor]; [btnName addTarget:self action:@selector(handlePushBtn:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btnName]; } - (void)returnupButton{ UIButton *btnName = [UIButton buttonWithType:UIButtonTypeSystem]; btnName.frame = CGRectMake(20, 200, 280, 40); [btnName setTitle:@"返回一界面" forState:UIControlStateNormal]; btnName.backgroundColor = [UIColor orangeColor]; [btnName addTarget:self action:@selector(handlePopBtn:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btnName]; } - (void)handlePushBtn:(UIButton *)button { //1.创建第二个视图控制器对象 ThirdViewController *thirdVC = [[ThirdViewController alloc] init]; //2.通过导航控制器push到下一个界面(视图控制器自带的 navigationContrller 属性能够获取到当前视图控制器的导航控制器,然后,通过导航控制器进行push) [self.navigationController pushViewController:thirdVC animated:YES]; //3.释放 [thirdVC release]; } //返回上一界面 - (void)handlePopBtn:(UIButton *)button { //代理传值第六步:让代理执行任务 //安全处理,判段代理是否实现了方法,防止崩溃 if ([self.delegate respondsToSelector:@selector(passValue:)]) { [self.delegate passValue:[(UITextField *)[self.view viewWithTag:200] text]]; } [self.navigationController popViewControllerAnimated:YES]; } -(void)dealloc { [_data release]; [super dealloc]; } @end
Singleton.h 单例传值
#import <Foundation/Foundation.h> /** *界面间传值之三:多个界面之间传值 九阴真经:单例传值 招式1:定义单例类,提供创建单例对象的+号方法. 2.在单例类中定义属性,存储要传递的数据.(属性数据类型要与传递的数据的类型一致) 3.在进入下一个界面之前,将数据让单例对象保存 4.在其他界面中直接从单例中获取数据即可. */ @interface Singleton : NSObject //创建+号方法,提供创建单例对象的方法 (单例命名规范,以main,share,standard,default开头) //单例类的优势:(1)节省空间 2.共享内存单元 + (Singleton *)mianSingleton; @property (nonatomic, copy)NSString *textFieldData; @end
Singleton.m
@implementation Singleton //单例的空间在整个程序运行期间都不会回收,会存在内存泄露问题,它的存在是为了解决待定问题 + (Singleton *)mianSingleton{ //静态变量 static Singleton *single = nil; if (!single) { single = [[Singleton alloc] init]; } return single; } @end
