//在APPDelegate.h中,即项目的入口部分
//didFinishLaunchingWithOptions该方法表示APP启动完毕,接下来进入自定义界面
//如下MyViewController是自定义的类,即一个界面实现UIViewController接口
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; self.window.backgroundColor = [UIColor whiteColor]; MyViewController *myController = [[MyViewController alloc] init]; UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:myController]; self.window.rootViewController = navController; [self.window makeKeyAndVisible]; return YES; }
//MyViewController.h //定义四个控件 @interface MyViewController : UIViewController @property (strong, nonatomic) UILabel *labelNum; @property (strong, nonatomic) UILabel *labelPwd; @property (strong, nonatomic) UITextField *fieldNum; @property (strong, nonatomic) UITextField *fieldPwd; @end //MyViewController.m - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.labelNum = [[UILabel alloc] init]; self.labelNum.frame = CGRectMake(100, 100, 50, 20); self.labelNum.text = @"Num: "; self.fieldNum = [[UITextField alloc] init]; self.fieldNum.frame = CGRectMake(150, 100, 100, 20); self.fieldNum.borderStyle = UITextBorderStyleRoundedRect; self.labelPwd = [[UILabel alloc] init]; self.labelPwd.frame = CGRectMake(100, 150, 50, 20); self.labelPwd.text = @"Pwd: "; self.fieldPwd = [[UITextField alloc] init]; self.fieldPwd.frame = CGRectMake(150, 150, 100, 20); self.fieldPwd.borderStyle = UITextBorderStyleRoundedRect; UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; btn.frame = CGRectMake(100, 200, 80, 20); btn.backgroundColor = [UIColor grayColor]; [btn setTitle:@"login" forState:UIControlStateNormal]; //设置按钮监听事件,监听方法为login [btn addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchDown]; [self.view addSubview:self.labelNum]; [self.view addSubview:self.fieldNum]; [self.view addSubview:self.labelPwd]; [self.view addSubview:self.fieldPwd]; [self.view addSubview:btn]; }
//页面跳转,并传递参数
-(void) login{ NSLog(@"login"); NSString *num = self.fieldNum.text; NSString *pwd = self.fieldPwd.text; if([num isEqualToString:@"123"] == TRUE){ NSLog(@"yes"); //初始化要跳转的界面 MainViewController *mm = [[MainViewController alloc] init]; //把账号密码传递到下个界面 [mm initData:num two:pwd]; //开始跳转 [self.navigationController pushViewController:mm animated:FALSE]; }else{ NSLog(@"error"); } }
//MainViewController.h
@interface MainViewController : UIViewController //@property( nonatomic) NSString //传递两个参数a、b NSString 类型 -(void) initData:(NSString *) a two:(NSString *) b; @end
//接收参数,并保存 -(void) initData:(NSString *) a two:(NSString *) b{ self.num = a; self.pwd = b; NSLog(@"%@,%@", self.num, self.pwd); }
//效果图
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