你的位置:首页 > 操作系统

[操作系统]iOS 网络基础


iOS 网络基础

一次HTTP请求的完整过程

  浏览器/应用 发出请求(请求包含HTTP请求(GET,POST),地址URL,协议(HTTP/1.1),请求头部,附加信息)

  --> Web服务端处理(页面:静态html页面、动态php/asp/jsp页面) --> 浏览器/应用

GET/POST区别:

  都是HTTP请求方式

  GET:只获取数据,所有参数都在URL网址中,用于简单地获取数据(不安全)

  POST:获取上传附加数据,请求参数在请求头文件,需传输加密信息

网络请求开源库AFNetWorking的使用

 // [self testGetRequest]; //1.GET请求(html,json,// [self testPostRequest]; //2.POST请求  //  [self testUploadFile]; //3.上传文件  //  [self testDownloadFile]; //4.下载文件    [self testMonitorNetworkStatus]; //5.监控网络状态    //6.图片异步功能(替代SDWebImage)  // UIKit+AFNetworking.h  // - (void)setImageWithURL:(NSURL *)url;    //7.有些请求特殊的请求头  // BAIDU_WISE_UID=wapp_1428385381699_466;  //AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];  //[manager.requestSerializer setValue:@"wapp_1428385381699_466" forHTTPHeaderField:@"BAIDU_WISE_UID"];

1.GET请求

#pragma mark - 1.GET请求-(void)testGetRequest{  NSString *urlStr = @"http://www.baidu.com";    //定义AFHTTPRequest管理对象  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    //注:默认情况下,默认数据格式JSON,content-type:JSON ,responseObjectd是解析的字典和数组  //不是产生错误Code=-1016  //解决:设置解析器为HTTP形式,下载回来的为NSData  manager.responseSerializer = [AFHTTPResponseSerializer serializer];  [manager GET:urlStr parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {        //responseObject 重要参数--> 包含下载的数据    NSString *str = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];        NSLog(@"str = %@",str);      } failure:^(AFHTTPRequestOperation *operation, NSError *error) {    NSLog(@"error %@",error);  }];}

2.POST请求

#pragma mark - 2.POST请求-(void)testPostRequest{    //POST接口:http://quiet.local/testdir/login.php  //参数1: @"user" : @"quiet"  //参数2: @"password" : @"123"  NSString *urlString = @"http://quiet.local/testdir/login.php";  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];  manager.requestSerializer = [AFHTTPRequestSerializer serializer];    //参数1: 传入地址  //参数2: 传入URL请求的参数, 格式传入字典//parameters --> 传进一个字典@{}  [manager POST:urlString parameters:@{@"user":@"quiet",@"password":@"123"} success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSString *str = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];     NSLog(@"str = %@",str);      } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"error %@",error);  }];  }

3.图片上传

#pragma mark - 3.图片上传-(void)testUploadFile{  //POST上传接口  NSString *urlStr = @"http://quiet.local/uploadtest/upload.php";  //参数名: image : 参数值是图片  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    manager.responseSerializer = [AFHTTPResponseSerializer serializer];  [manager POST:urlStr parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {    //实现:上传的数据附加到请求体中    NSString *path = [[NSBundle mainBundle] pathForResource:@"back2.jpg" ofType:nil];        //mimeType 多用途互联网邮件扩展类型, 每种文件都有一个类型 --> 直接上网搜格式    [formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"12222" fileName:@"mddse.jpg" mimeType:@"12222/jpeg" error:nil];      } success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSString *str = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];    NSLog(@"str = %@",str);      } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"error = %@",error);  }];  }

4.下载文件

#pragma mark - 4.下载文件-(void)testDownloadFile{  NSString *urlString = @"http://imgcache.qq.com/club/item/avatar/zip/7/i87/all.zip";    //创建回话管理器对象(默认配置)AFURLSessionManager *manager  AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];    // NSURLSessionDownloadTask *task  NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]] progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {    //返回文件保存的位置    NSString *path = [NSString stringWithFormat:@"%@/Documents/all.zip",NSHomeDirectory()];    NSLog(@"path = %@",path);    return [NSURL fileURLWithPath:path];      } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {    //    NSLog(@"下载完成");  }];  //  [task resume]; //启动任务  }

5.监控网络状态

#pragma mark - 5.监控网络状态-(void)testMonitorNetworkStatus{  AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:@"www.baidu.com"]];  //  [manager.reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {    //AFNetworkReachabilityStatusn几种状态    NSDictionary *dict =@{@(AFNetworkReachabilityStatusUnknown):@"未知",@(AFNetworkReachabilityStatusNotReachable):@"不可达",@(AFNetworkReachabilityStatusReachableViaWWAN):@"GPRS",@(AFNetworkReachabilityStatusReachableViaWiFi):@"Wifi"};        NSLog(@"状态为 %@",dict[@(status)]);  }];  [manager.reachabilityManager startMonitoring];  //开启状态监视}