iOS利用ASIHTTPRequest 实现一个简单的登陆验证

今天给大家带来一个简单的登陆验证，用的是ASIHttpRequest 这个开源类库，使用的方法很简单，从网上下载下来以后，添加到项目中，并添加一下这些框架。

下面上代码

//  //  ViewController.h  //  NetDemo  //  //  Created by zhouhaifeng on 12-6-6.  //  Copyright (c) 2012年 zhouhaifeng. All rights reserved.  //    #import   #import "ASIHttpHeaders.h"  #import "CJSONDeserializer.h"  #import "tooles.h"  @interface ViewController : UIViewController {      UITextField *username;      UITextField *password;    }  @property (nonatomic,retain) UITextField *username;  @property (nonatomic,retain) UITextField *password;    @end

//  //  ViewController.m  //  NetDemo  //  //  Created by zhouhaifeng on 12-6-6.  //  Copyright (c) 2012年 zhouhaifeng. All rights reserved.  //    #import "ViewController.h"  #define HOSTURL @"http://192.168.1.105/NetDemo/index.php";      @interface ViewController ()  -(void) login:(id)sender;  -(void) GetErr:(ASIHTTPRequest *)request;  -(void) GetResult:(ASIHTTPRequest *)request;  @end    @implementation ViewController  @synthesize username,password;  - (void)viewDidLoad  {      [super viewDidLoad];   // Do any additional setup after loading the view, typically from a nib.      UILabel *txt1 = [[UILabel alloc] initWithFrame:CGRectMake(30,100,70,30)];      [txt1 setText:@"用户名"];      [txt1 setBackgroundColor:[UIColor clearColor]];      [self.view addSubview:txt1];            UILabel *txt2 = [[UILabel alloc] initWithFrame:CGRectMake(30,140,70,30)];      [txt2 setText:@"密   码"];      [txt2 setBackgroundColor:[UIColor clearColor]];      [self.view addSubview:txt2];            username = [[UITextField alloc]initWithFrame:CGRectMake(120,100, 150, 30)];      [username setBorderStyle:UITextBorderStyleRoundedRect];      [self.view addSubview:username];            password = [[UITextField alloc]initWithFrame:CGRectMake(120,140, 150, 30)];      [password setBorderStyle:UITextBorderStyleRoundedRect];      [password setSecureTextEntry:YES];      [self.view addSubview:password];            UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];      [btn setTitle:@"提交" forState:UIControlStateNormal];      [btn addTarget:self action:@selector(login:) forControlEvents:UIControlEventTouchUpInside];      [btn setFrame:CGRectMake(90, 180, 150, 40)];      [self.view addSubview:btn];                }    -(void) login:(id)sender  {      //表单提交前的验证      if (username.text == nil||password.text==nil ) {          [tooles MsgBox:@"用户名或密码不能为空！"];    return;      }      //隐藏键盘      [username resignFirstResponder];      [password resignFirstResponder];      //      [tooles showHUD:@"正在登陆...."];   NSString *urlstr = HOSTURL;   NSURL *myurl = [NSURL URLWithString:urlstr];   ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:myurl];   //设置表单提交项   [request setPostValue:username.text forKey:@"username"];    [request setPostValue:username.text forKey:@"password"];   [request setDelegate:self];   [request setDidFinishSelector:@selector(GetResult:)];   [request setDidFailSelector:@selector(GetErr:)];   [request startAsynchronous];           }       //获取请求结果  - (void)GetResult:(ASIHTTPRequest *)request{       [tooles removeHUD];      NSData *data =[request responseData];      NSDictionary *dictionary = [[CJSONDeserializer deserializer] deserializeAsDictionary:data error:nil];   
    //输出接收到的字符串
  
    NSString *str = [NSString stringWithUTF8String:[data bytes]];
  
    NSLog(@"%@",str);
  
    //判断是否登陆成功
      if ([dictionary objectForKey:@"yes"]) {    [tooles MsgBox:[dictionary objectForKey:@"yes"]];    return;      }else if ([dictionary objectForKey:@"error"] != [NSNull null]) {    [tooles MsgBox:[dictionary objectForKey:@"error"]];    return;   }     }      //连接错误调用这个函数  - (void) GetErr:(ASIHTTPRequest *)request{            [tooles removeHUD];            [tooles MsgBox:@"网络错误,连接不到服务器"];  }    - (void)viewDidUnload  {      [super viewDidUnload];      // Release any retained subviews of the main view.  }    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  {      return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);  }    -(void) dealloc  {      [username release];      [password release];      [super dealloc];  }    @end

<?php            if($_POST['username'] == "admin" &&  $_POST['password'] == "admin")            {                echo '{"yes":"登陆成功"}';            }else            {                echo '{"error":"用户名或密码错误"}';            };        ?>