AFN的六大模塊

NSURLConnection，主要對(duì)NSURLConnection進(jìn)行了進(jìn)一步的封裝，包含以下核心的類：

NSURLsession，主要對(duì)象NSURLSession對(duì)象進(jìn)行了進(jìn)一步的封裝，包含以下核心的類：

Reachability，提供了與網(wǎng)絡(luò)狀態(tài)相關(guān)的操作接口，包含以下核心的類：

Security，提供了與安全性相關(guān)的操作接口，包含以下核心的類：

Serialization，提供了與解析數(shù)據(jù)相關(guān)的操作接口，包含以下核心的類：

UIKit，提供了大量網(wǎng)絡(luò)請(qǐng)求過程中與UI界面顯示相關(guān)的操作接口，通常用于網(wǎng)絡(luò)請(qǐng)求過程中提示，使用戶交互更加友好，包含以下核心的分類/類：

AFURLSessionManager

創(chuàng)建任務(wù)的方法

普通任務(wù)

- (NSURLSessionDataTask *)dataTaskWithRequest:(NSURLRequest *)request completionHandler:(void (^)(NSURLResponse *response, id responSEObject, NSError *error))completionHandler/*** request：請(qǐng)求對(duì)象* completionHandler：請(qǐng)求完成調(diào)用的Block 	* response：服務(wù)器的響應(yīng)信息	* responseObject：服務(wù)器返回的數(shù)據(jù)	* error：錯(cuò)誤信息*/
上傳任務(wù)(分別上傳不同類型的文件)
// 1. 上傳文件類型的數(shù)據(jù)- (NSURLSessionUploadTask *)uploadTaskWithRequest:(NSURLRequest *)request fromFile:(NSURL *)fileURL progress:(NSProgress * __autoreleasing *)progress completionHandler:(void (^)(NSURLResponse *response, id responseObject, NSError *error))completionHandler/*** fileURL：所要上傳文件的路徑*/// 2. 上傳NSData類型的數(shù)據(jù)- (NSURLSessionUploadTask *)uploadTaskWithRequest:(NSURLRequest *)request fromData:(NSData *)bodyData progress:(NSProgress * __autoreleasing *)progress completionHandler:(void (^)(NSURLResponse *response, id responseObject, NSError *error))completionHandler/*** bodyData：所要上傳的文件數(shù)據(jù)*/// 3. 上傳流數(shù)據(jù)- (NSURLSessionUploadTask *)uploadTaskWithStreamedRequest:(NSURLRequest *)request progress:(NSProgress * __autoreleasing *)progress completionHandler:(void (^)(NSURLResponse *response, id responseObject, NSError *error))completionHandler/*** request：通過流數(shù)據(jù)初始化的請(qǐng)求對(duì)象*/
下載任務(wù)
// 1. 普通下載任務(wù)- (NSURLSessionDownloadTask *)downloadTaskWithRequest:(NSURLRequest *)request progress:(NSProgress * __autoreleasing *)progress destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler/*** progress：管理下載進(jìn)度* destination：保存數(shù)據(jù)調(diào)用的Block	* targetPath：數(shù)據(jù)的保存路徑	* 服務(wù)器的響應(yīng)信息*/// 2. 支持?jǐn)帱c(diǎn)下載的下載任務(wù)- (NSURLSessionDownloadTask *)downloadTaskWithResumeData:(NSData *)resumeData progress:(NSProgress * __autoreleasing *)progress destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler /*** progress：管理下載進(jìn)度* resumeData：斷點(diǎn)下載時(shí)的斷點(diǎn)信息*/                                   
AFHTTPSessionManager
常用的屬性
baseURL(NSURL *)，用于監(jiān)視網(wǎng)絡(luò)可達(dá)性與創(chuàng)建請(qǐng)求對(duì)象requestSerializer(AFHTTPRequestSerializer *)，指定指定GET、HEAD與DELETE請(qǐng)求參數(shù)的解析格式responseSerializer(AFHTTPResponseSerializer *)，用于指定服務(wù)器返回?cái)?shù)據(jù)的格式
常用方法
初始化
// 1. 通過工廠方法創(chuàng)建AFHTTPSessionManager對(duì)象+ (instancetype)manager// 2. 通過構(gòu)造方法創(chuàng)建AFHTTPSessionManager對(duì)象- (instancetype)initWithBaseURL:(NSURL *)url/*** 根據(jù)url初始化AFHTTPSessionManager對(duì)象*/- (instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration/*** 根據(jù)url與configuration初始化AFHTTPSessionManager對(duì)象*/
請(qǐng)求數(shù)據(jù)
// 1. GET請(qǐng)求- (NSURLSessionDataTask *)GET:(NSString *)URLString parameters:(id)parameters success:(void (^)(NSURLSessionDataTask *task, id responseObject))success failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure/*** URLString：請(qǐng)求路徑* parameters：請(qǐng)求參數(shù)* success：請(qǐng)求成功時(shí)調(diào)用的Block	* responseObject：服務(wù)器返回的數(shù)據(jù)* failure：請(qǐng)求失敗時(shí)調(diào)用的Block	* error：錯(cuò)誤信息*/// 2. POST請(qǐng)求- (NSURLSessionDataTask *)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(NSURLSessionDataTask *task, id responseObject))success failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure/*** 參數(shù)含義與GET請(qǐng)求相同*/- (NSURLSessionDataTask *)POST:(NSString *)URLString parameters:(id)parameters constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block success:(void (^)(NSURLSessionDataTask *task, id responseObject))success failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure/*** block：用于創(chuàng)建多個(gè)數(shù)據(jù)來(lái)源*/
使用AFN請(qǐng)求網(wǎng)絡(luò)數(shù)據(jù)
請(qǐng)求數(shù)據(jù)（xml/JSON）
創(chuàng)建AFHTTPSessionManager對(duì)象
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
指定對(duì)服務(wù)器的返回?cái)?shù)據(jù)格式
//以XML文檔的形式返回?cái)?shù)據(jù)manager.responseSerializer = [AFXMLParserResponseSerializer serializer];//以JSON形式返回?cái)?shù)據(jù)manager.responseSerializer = [AFJSONResponseSerializer serializer];
設(shè)置請(qǐng)求體(類型為XML或JSON)
// 請(qǐng)求體通常由服務(wù)器指定格式	NSDictionary *params = @{                         @"username" : @"賬號(hào)",                         @"pwd" : @"密碼",                         @"type" : @"XML/JSON"                         };                             
發(fā)送請(qǐng)求
[manager GET:@"請(qǐng)求路徑" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {	//responseObject：服務(wù)器返回的數(shù)據(jù)    NSLog(@"請(qǐng)求成功");} failure:^(NSURLSessionDataTask *task, NSError *error) {	//error：錯(cuò)誤信息    NSLog(@"請(qǐng)求失敗");}];
上傳數(shù)據(jù)
創(chuàng)建AFHTTPSessionManager對(duì)象
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
創(chuàng)建上傳任務(wù)
/**基于NSURLConnection*/[manager POST:@"請(qǐng)求路徑" parameters:@{@"用戶名" : @"密碼" constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { 	//設(shè)置需要上傳的文件    NSData *data = [NSData dataWithContentsOfFile:@"所要長(zhǎng)傳文件的路徑"];    [formData appendPartWithFileData:data name:@"file" fileName:@"test.png" mimeType:@"image/png"];} success:^(NSURLSessionDataTask *task, id responseObject) {          //上傳成功} failure:^(NSURLSessionDataTask *task, NSError *error) {    //上傳失敗}];/**基于NSURLSession*/[manager uploadTaskWithRequest:request fromData:data progress:progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {    //上傳數(shù)據(jù)成功}];
下載數(shù)據(jù)
創(chuàng)建AFHTTPSessionManager對(duì)象
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
創(chuàng)建下載任務(wù)
/**基于NSURLSession*/[manager downloadTaskWithRequest:request progress:progress destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {    // 存儲(chǔ)下載數(shù)據(jù)是調(diào)用的Block} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {    //下載完成時(shí)調(diào)用的Block}]