简单界面设置及切换

第一步：创建视图控制器并创建LoginViewController、RegistViewController、PasswordViewController三个控制器：

#import "MainViewController.h"

#import "LoginViewController.h"

#import "RegistViewController.h"

#import "PasswordViewController.h"

@interface MainViewController ()

@end

@implementation MainViewController 

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    RegistViewController *registVC=[[RegistViewController alloc]init];

    [self.view addSubview:registVC.view];

    PasswordViewController *passwordVC=[[PasswordViewController alloc]init];

    [self.view addSubview:passwordVC.view];

    LoginViewController *logicaVC = [[LoginViewController alloc] init];

    [self.view addSubview:logicaVC.view];

}

第二步：创建LTView视图：

实现LoginViewController

简单界面设置及切换

原文：http://www.cnblogs.com/sxsy-2015/p/4888463.html