创建登陆窗口（有用户名和密码），确认后弹出对话框再输入一遍，如果都相同，显示用户图片，如果不相同，弹出上拉菜单（UIActionSheet），问是否重新输入，是的话弹出对话框重新输入。
效果图：
viewController.h:
// // DXWViewController.h // 2013-8-12作业 // // Created by 丁小未 on 13-8-12. // Copyright (c) 2013年 dingxiaowei. All rights reserved. // #import <UIKit/UIKit.h> @interface DXWViewController : UIViewController<UIAlertViewDelegate,UIActionSheetDelegate> @property (retain, nonatomic) IBOutlet UITextField *lblName; @property (retain, nonatomic) IBOutlet UITextField *lblPassword; - (IBAction)Check:(id)sender; @property (retain, nonatomic) IBOutlet UIImageView *image; - (IBAction)clickKeyBoardReturn:(id)sender; @property (retain, nonatomic) IBOutlet UILabel *lblState; @end
ViewController.m:
// // DXWViewController.m // 2013-8-12作业 // // Created by 丁小未 on 13-8-12. // Copyright (c) 2013年 dingxiaowei. All rights reserved. // #import "DXWViewController.h" #import "MyDelegate.h" NSString *nameT; NSString *pwdT; @interface DXWViewController () @end @implementation DXWViewController - (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex { if(buttonIndex == 0) { NSLog(@"重试"); UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"身份验证" message:@"请输入用户名和密码" delegate:self cancelButtonTitle:@"登陆" otherButtonTitles:@"取消",nil]; alert.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput; [alert show]; [alert release]; } else if(buttonIndex == 1) { NSLog(@"取消"); } } //实现协议 - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex { NSLog(@"didDismissWithButtonIndex %d",buttonIndex); NSLog(@"%@",[alertView textFieldAtIndex:0].text); NSLog(@"%@",[alertView textFieldAtIndex:1].text); nameT = [alertView textFieldAtIndex:0].text; pwdT = [alertView textFieldAtIndex:1].text; NSString *na = self.lblName.text; NSString *pw = self.lblPassword.text; if (buttonIndex == 0) { //相同为0,不同为-1 if ([nameT compare:na]==0 && [pwdT compare:pw]==0) { //登陆成功显示图片 NSLog(@"登陆成功!"); self.lblState.text = @"登陆成功,酷狗来也！"; self.image.hidden = false; self.lblState.hidden = false; } else { self.image.hidden = true; self.lblState.text = @"登陆失败!"; self.lblState.hidden = false; NSLog(@"登陆失败!"); UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"选择框" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"重试" otherButtonTitles:nil]; sheet.actionSheetStyle = UIActionSheetStyleBlackOpaque; [sheet showInView:self.view]; } } else if(buttonIndex == 1) { NSLog(@"取消"); } } - (void)viewDidLoad { [super viewDidLoad]; self.image.hidden = YES;//将头像图片隐藏 [self.lblName becomeFirstResponder];//设置为第一响应者 self.lblState.hidden = YES;//隐藏消息栏 } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (void)dealloc { [_lblName release]; [_lblPassword release]; [_image release]; [_lblState release]; [super dealloc]; } - (IBAction)Check:(id)sender { // MyDelegate *delegate = [[MyDelegate alloc]init]; UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"身份验证" message:@"请输入用户名和密码" delegate:self cancelButtonTitle:@"登陆" otherButtonTitles:@"取消",nil]; alert.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput; [alert show]; [alert release]; } - (IBAction)clickKeyBoardReturn:(id)sender { [self.lblName resignFirstResponder]; [self.lblPassword resignFirstResponder]; } @end
如果允许让屏幕横屏：
//是否可以自动横屏 -(BOOL)shouldAutorotate { return YES; } //可以各个方向横屏 -(NSUInteger)supportedInterfaceOrientations { return UIInterfaceOrientationMaskAll; }
//每当屏幕旋转的时候都会触发一个
-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
//如果是是横屏状态
if(toInterfaceOrientation ==UIInterfaceOrientationLandscapeLeft ||toInterfaceOrientation ==UIInterfaceOrientationLandscapeRight)
{
}
else
{
}
如果要设置系统启动时就是横屏，可以修改plist文件Supportd interface orientations的Item的顺序，如果item0是横屏，那就是横屏启动，在项目运行的时候，可以点击command+左右键
项目源文件：http://download.csdn.net/detail/s10141303/5923513
本文转蓬莱仙羽51CTO博客，原文链接：http://blog.51cto.com/dingxiaowei/1366437，如需转载请自行联系原作者
