button、label、textfield、页面跳转、传值

   .AppDelegate.m

   #import “OneViewController.h”
   //一打开就运行的
   -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
   {
       self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen]bounds]];
       OneViewController *oneController = [[OneViewController alloc] init];
       [self.window setRootViewController:oneController];
      [self.window makeKeyAndVisible];
      return YES;
  }

  .OneViewController.m

  #import “TwoViewController.h”
  -(void)viewDidLoad
  {
  [super viewDidLoad];
  self.view.backgroundColor = [UIColor orangeColor];

  [self OneButton];
  }
  //添加button
  #pragma mark – Button
  -(void)OneButton
  {
      UIButton *myButton = [[UIButton alloc] init];
      myButton.frame = CGRectMake(,300,90,35);
      myButton.backgroundColor = [UIColor grayColor];
      [myButton setTitle:”确定” forState:UIControlStateNormal];
      [self.view.addSubview:myButton];
  //addSubview: 添加一个视图对接收者的子视图列表。
      [myButton addTarget:self action:@selector(ClickMyButton) forControlEvents:UIControlEventTouchUpInside];
  //addTarget: 将目标对象和动作方法与控制关联。
  }
  //Button点击事件
  #pragma mark - Button
  -(void)ClickButton
  {
      TwoViewController *two = [[TwoViewController alloc] init];
      //跳转到下一页面
  　　[self presentViewController:two animated:YES completion:nil];
  }
  //跳转到上一页面
  [self dismissViewControllerAnimated:YES completion:nil];

  .Label

  [self label1];

  -(void)Label
  {
      UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(,,,)];
      label1.backgroundColor = [UIColor whiteColor];
      label1.text = @”显示”;
      label1.textColor = [UIColor blackColor];
      [self.view addSubview:label1];
  }

  .TextField

  [self _text];

  -(void)TextField
  {
      _text = [[UITextField alloc] initWithFrame:CGRectMake(,,,)];
      _text.borderStyle = UITextBorderStyleRoundedRect;
      _text.backgroundColor = [UIColor whiteColor];
      _text.placeholder = @”请输入密码”;
      _text.textColor = [UIColor blackColor];
      _text.keyboardType = UIKeyboardTypeDefault;
      _text.returnKeyType = UIReturnKeyGo;
      [self.view addSubview:_text];
  }