【IOS】利用ASIHTTPRequest 实现一个简单的登陆验证

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原文地址：http://blog.csdn.net/toss156/article/details/7638529】

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 <UIKit/UIKit.h> #import "ASIHttpHeaders.h" #import "CJSONDeserializer.h" #import "tooles.h" @interface ViewController : UIViewController<ASIHTTPRequestDelegate> { 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]; <p class="p1"><span class="s1"> </span><span class="s2">//</span>输出接收到的字符串</p> <p class="p2"><span class="s4"> NSString</span><span class="s3"> *str = [</span><span class="s4">NSString</span><span class="s3"> </span>stringWithUTF8String<span class="s3">:[data </span>bytes<span class="s3">]];</span></p> <p class="p3"> <span class="s5">NSLog</span>(<span class="s6">@"%@"</span>,str);</p> <p class="p1"><span class="s1"> </span><span class="s2">//</span>判断是否登陆成功</p> 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端验证的代码，随便写了下，后面就是返回一个JSON格式的字符串。
<?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"}'; }; ?>