AFNetworking是一个轻量级的iOS网络通信类库 。它 建立在NSURLConnection和NSOperation等类库 的基础上，让很多网络通信功能的实现变得十分简单。它支持HTTP请求和基于REST的网络服务（包括GET、POST、 PUT、DELETE等）。支持ARC。

////  MJViewController.m//  03.AFN演练////  Created by apple on 14-4-30.// Copyright (c) 2014年 itcast. All rights reserved. // #import "MJViewController.h" #import "AFNetworking.h" @interface MJViewController () @end @implementation MJViewController /** 要使用常规的AFN网络访问 1. AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; 所有的网络请求,均有manager发起 2. 需要注意的是,默认提交请求的数据是二进制的,返回格式是JSON 1> 如果提交数据是JSON的,需要将请求格式设置为AFJSONRequestSerializer 2> 如果返回格式不是JSON的, 3. 请求格式 AFHTTPRequestSerializer 二进制格式 AFJSONRequestSerializer JSON AFPropertyListRequestSerializer PList(是一种特殊的XML,解析起来相对容易) 4. 返回格式 AFHTTPResponseSerializer 二进制格式 AFJSONResponseSerializer JSON AFXMLParserResponseSerializer XML,只能返回XMLParser,还需要自己通过代理方法解析 AFXMLDocumentResponseSerializer (Mac OS X) AFPropertyListResponseSerializer PList AFImageResponseSerializer Image AFCompoundResponseSerializer 组合 */ - (void)viewDidLoad { [super viewDidLoad]; [self reach]; } #pragma mark - 演练 #pragma mark - 检测网络连接 - (void)reach { /** AFNetworkReachabilityStatusUnknown = -1, // 未知 AFNetworkReachabilityStatusNotReachable = 0, // 无连接 AFNetworkReachabilityStatusReachableViaWWAN = 1, // 3G 花钱 AFNetworkReachabilityStatusReachableViaWiFi = 2, // 局域网络,不花钱 */ // 如果要检测网络状态的变化,必须用检测管理器的单例的startMonitoring [[AFNetworkReachabilityManager sharedManager] startMonitoring]; // 检测网络连接的单例,网络变化时的回调方法 [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) { NSLog(@"%d", status); }]; } #pragma mark - Session 下载 - (void)sessionDownload { NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:config]; NSString *urlString = @"http://localhost/itcast/videos/01.C语言-语法预览.mp4"; urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSURL *url = [NSURL URLWithString:urlString]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) { // 指定下载文件保存的路径 // NSLog(@"%@ %@", targetPath, response.suggestedFilename); // 将下载文件保存在缓存路径中 NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0]; NSString *path = [cacheDir stringByAppendingPathComponent:response.suggestedFilename]; // URLWithString返回的是网络的URL,如果使用本地URL,需要注意 NSURL *fileURL1 = [NSURL URLWithString:path]; NSURL *fileURL = [NSURL fileURLWithPath:path]; NSLog(@"== %@ |||| %@", fileURL1, fileURL); return fileURL; } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) { NSLog(@"%@ %@", filePath, error); }]; [task resume]; } #pragma mark - POST JSON - (void)postJSON { AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; NSDictionary *dict = @{ @"name": @"zhangsan"}; NSDictionary *dict1 = @{ @"name": @"wangwu"}; NSArray *array = @[dict, dict1]; // 设置请求格式 manager.requestSerializer = [AFJSONRequestSerializer serializer]; // 设置返回格式 manager.responseSerializer = [AFHTTPResponseSerializer serializer]; [manager POST:@"http://localhost/postjson.php" parameters:array success:^(AFHTTPRequestOperation *operation, id responseObject) { NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]; NSLog(@"%@", result); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { }]; } #pragma mark - 随机文件名上传 - (void)postUpload1 { // 本地上传给服务器时,没有确定的URL,不好用MD5的方式处理 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; manager.responseSerializer = [AFHTTPResponseSerializer serializer]; [manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id
     
       formData) { NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"头像1.png" withExtension:nil]; // 要上传保存在服务器中的名称 // 使用时间来作为文件名 2014-04-30 14:20:57.png // 让不同的用户信息,保存在不同目录中 NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; // 设置日期格式 formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss"; NSString *fileName = [formatter stringFromDate:[NSDate date]]; [formData appendPartWithFileURL:fileURL name:@"uploadFile" fileName:fileName mimeType:@"image/png" error:NULL]; } success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"OK"); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"error"); }]; } #pragma mark - POST上传 - (void)postUpload { AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; // AFHTTPResponseSerializer就是正常的HTTP请求响应结果:NSData // 当请求的返回数据不是JSON,XML,PList,UIImage之外,使用AFHTTPResponseSerializer // 例如返回一个html,text... // // 实际上就是AFN没有对响应数据做任何处理的情况 manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // formData是遵守了AFMultipartFormData的对象 [manager POST:@"http://localhost/demo/upload.php" parameters:nil constructingBodyWithBlock:^(id
      
        formData) { // 将本地的文件上传至服务器 NSURL *fileURL = [[NSBundle mainBundle] URLForResource:@"头像1.png" withExtension:nil]; [formData appendPartWithFileURL:fileURL name:@"uploadFile" error:NULL]; } success:^(AFHTTPRequestOperation *operation, id responseObject) { NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]; NSLog(@"完成 %@", result); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"错误 %@", error.localizedDescription); }]; } #pragma mark - JSON - (void)XMLData { AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; // 返回的数据格式是XML manager.responseSerializer = [AFXMLParserResponseSerializer serializer];