{"id":1875,"date":"2016-01-11T15:10:03","date_gmt":"2016-01-11T07:10:03","guid":{"rendered":"http:\/\/learn-house.idv.tw\/?p=1875"},"modified":"2016-01-11T15:11:44","modified_gmt":"2016-01-11T07:11:44","slug":"%e8%bd%89%e5%be%9e-nsurlconnection-%e5%88%b0-nsurlsession","status":"publish","type":"post","link":"https:\/\/learn-house.idv.tw\/?p=1875","title":{"rendered":"[\u8f49]\u5f9e NSURLConnection \u5230 NSURLSession"},"content":{"rendered":"

\u8f49\u8cbc\u4f4d\u5740\uff1ahttp:\/\/objccn.io\/issue-5-4\/<\/p>\n

iOS 7 \u548c Mac OS X 10.9 Mavericks \u4e2d\u4e00\u500b\u986f\u8457\u7684\u8b8a\u5316\u5c31\u662f\u5c0d Foundation URL \u52a0\u8f09\u7cfb\u7d71\u7684\u5fb9\u5e95\u91cd\u69cb\u3002<\/p>\n

\u73fe\u5728\u5df2\u7d93\u6709\u4eba\u5728\u6df1\u5165\u860b\u679c\u7684\u7db2\u7d61\u5c64\u57fa\u790e\u67b6\u69cb\u7684\u5730\u65b9\u505a\u7814\u7a76\u4e86\uff0c\u6240\u4ee5\u6211\u60f3\u662f\u6642\u5019\u4f86\u5206\u4eab\u4e00\u4e9b\u5c0d\u65bc\u6211\u5c0d\u65bc\u9019\u4e9b\u65b0\u7684 API \u7684\u770b\u6cd5\u548c\u5fc3\u5f97\u4e86\uff0c\u65b0\u7684 API \u5c07\u5982\u4f55\u5f71\u97ff\u6211\u5011\u7de8\u5beb\u7a0b\u5e8f\uff0c\u4ee5\u53ca\u5b83\u5011\u5c0d\u65bc API \u8a2d\u8a08\u7406\u5ff5\u7684\u5f71\u97ff\u3002<\/p>\n

<\/p>\n

NSURLConnection<\/code> \u4f5c\u70ba Core Foundation \/ CFNetwork \u6846\u67b6\u7684 API \u4e4b\u4e0a\u7684\u4e00\u500b\u62bd\u8c61\uff0c\u5728 2003 \u5e74\uff0c\u96a8\u8457\u7b2c\u4e00\u7248\u7684 Safari \u7684\u767c\u5e03\u5c31\u767c\u4f48\u4e86\u3002NSURLConnection<\/code> \u9019\u500b\u540d\u5b57\uff0c\u5be6\u969b\u4e0a\u662f\u6307\u4ee3\u7684 Foundation \u6846\u67b6\u7684 URL \u52a0\u8f09\u7cfb\u7d71\u4e2d\u4e00\u7cfb\u5217\u6709\u95dc\u806f\u7684\u7d44\u4ef6\uff1aNSURLRequest<\/code>\u3001NSURLResponse<\/code>\u3001NSURLProtocol<\/code>\u3001 NSURLCache<\/code>\u3001 NSHTTPCookieStorage<\/code>\u3001NSURLCredentialStorage<\/code> \u4ee5\u53ca\u540c\u540d\u985e NSURLConnection<\/code>\u3002<\/p>\n

NSURLRequest<\/code> \u88ab\u50b3\u905e\u7d66 NSURLConnection<\/code>\u3002\u88ab\u59d4\u8a17\u5c0d\u8c61\uff08\u9075\u5b88\u4ee5\u524d\u7684\u975e\u6b63\u5f0f\u5354\u8b70 <NSURLConnectionDelegate><\/code> \u548c<NSURLConnectionDataDelegate><\/code>\uff09\u7570\u6b65\u5730\u8fd4\u56de\u4e00\u500b NSURLResponse<\/code> \u4ee5\u53ca\u5305\u542b\u670d\u52d9\u5668\u8fd4\u56de\u4fe1\u606f\u7684 NSData<\/code>\u3002<\/p>\n

\u5728\u4e00\u500b\u8acb\u6c42\u88ab\u767c\u9001\u5230\u670d\u52d9\u5668\u4e4b\u524d\uff0c\u7cfb\u7d71\u6703\u5148\u67e5\u8a62\u5171\u4eab\u7684\u7de9\u5b58\u4fe1\u606f\uff0c\u7136\u5f8c\u6839\u64da\u7b56\u7565\uff08policy\uff09<\/strong>\u4ee5\u53ca\u53ef\u7528\u6027\uff08availability\uff09<\/strong>\u7684\u4e0d\u540c\uff0c\u4e00\u500b\u5df2\u7d93\u88ab\u7de9\u5b58\u7684\u97ff\u61c9\u53ef\u80fd\u6703\u88ab\u7acb\u5373\u8fd4\u56de\u3002\u5982\u679c\u6c92\u6709\u7de9\u5b58\u7684\u97ff\u61c9\u53ef\u7528\uff0c\u5247\u9019\u500b\u8acb\u6c42\u5c07\u6839\u64da\u6211\u5011\u6307\u5b9a\u7684\u7b56\u7565\u4f86\u7de9\u5b58\u5b83\u7684\u97ff\u61c9\u4ee5\u4fbf\u5c07\u4f86\u7684\u8acb\u6c42\u53ef\u4ee5\u4f7f\u7528\u3002<\/p>\n

\u5728\u628a\u8acb\u6c42\u767c\u9001\u7d66\u670d\u52d9\u5668\u7684\u904e\u7a0b\u4e2d\uff0c\u670d\u52d9\u5668\u53ef\u80fd\u6703\u767c\u51fa\u9451\u6b0a\u67e5\u8a62\uff08authentication challenge\uff09<\/strong>\uff0c\u9019\u53ef\u4ee5\u7531\u5171\u4eab\u7684 cookie \u6216\u6a5f\u5bc6\u5b58\u5132\uff08credential storage\uff09<\/strong>\u4f86\u81ea\u52d5\u97ff\u61c9\uff0c\u6216\u8005\u7531\u88ab\u59d4\u8a17\u5c0d\u8c61\u4f86\u97ff\u61c9\u3002\u767c\u9001\u4e2d\u7684\u8acb\u6c42\u4e5f\u53ef\u4ee5\u88ab\u8a3b\u518a\u7684 NSURLProtocol<\/code> \u5c0d\u8c61\u6240\u6514\u622a\uff0c\u4ee5\u4fbf\u5728\u5fc5\u8981\u7684\u6642\u5019\u7121\u7e2b\u5730\u6539\u8b8a\u5176\u52a0\u8f09\u884c\u70ba\u3002<\/p>\n

\u4e0d\u7ba1\u600e\u6a23\uff0cNSURLConnection<\/code> \u4f5c\u70ba\u7db2\u7d61\u57fa\u790e\u67b6\u69cb\uff0c\u5df2\u7d93\u670d\u52d9\u4e86\u6210\u5343\u4e0a\u842c\u7684 iOS \u548c Mac OS \u7a0b\u5e8f\uff0c\u4e26\u4e14\u505a\u7684\u9084\u7b97\u76f8\u7576\u4e0d\u932f\u3002\u4f46\u662f\u9019\u4e9b\u5e74\uff0c\u4e00\u4e9b\u7528\u4f8b\u2014\u2014\u5c24\u5176\u662f\u5728 iPhone \u548c iPad \u4e0a\u9762\u2014\u2014\u5df2\u7d93\u5c0d NSURLConnection<\/code> \u7684\u5e7e\u500b\u6838\u5fc3\u6982\u5ff5\u63d0\u51fa\u4e86\u6311\u6230\uff0c\u8b93\u860b\u679c\u6709\u7406\u7531\u5c0d\u5b83\u9032\u884c\u91cd\u69cb\u3002<\/p>\n

\u5728 2013 \u7684 WWDC \u4e0a\uff0c\u860b\u679c\u63a8\u51fa\u4e86 NSURLConnection<\/code> \u7684\u7e7c\u4efb\u8005\uff1aNSURLSession<\/code>\u3002<\/p>\n

\n

\u548c NSURLConnection<\/code> \u4e00\u6a23\uff0cNSURLSession<\/code> \u6307\u7684\u4e5f\u4e0d\u50c5\u662f\u540c\u540d\u985e NSURLSession<\/code>\uff0c\u9084\u5305\u62ec\u4e00\u7cfb\u5217\u76f8\u4e92\u95dc\u806f\u7684\u985e\u3002NSURLSession<\/code> \u5305\u62ec\u4e86\u8207\u4e4b\u524d\u76f8\u540c\u7684\u7d44\u4ef6\uff0cNSURLRequest<\/code> \u8207 NSURLCache<\/code>\uff0c\u4f46\u662f\u628a NSURLConnection<\/code> \u66ff\u63db\u6210\u4e86NSURLSession<\/code>\u3001NSURLSessionConfiguration<\/code> \u4ee5\u53ca NSURLSessionTask<\/code> \u7684 3 \u500b\u5b50\u985e\uff1aNSURLSessionDataTask<\/code>\uff0cNSURLSessionUploadTask<\/code>\uff0cNSURLSessionDownloadTask<\/code>\u3002<\/p>\n

\u8207 NSURLConnection<\/code> \u76f8\u6bd4\uff0cNSURLsession<\/code> \u6700\u76f4\u63a5\u7684\u6539\u9032\u5c31\u662f\u53ef\u4ee5\u914d\u7f6e\u6bcf\u500b session \u7684\u7de9\u5b58\uff0c\u5354\u8b70\uff0ccookie\uff0c\u4ee5\u53ca\u8b49\u66f8\u7b56\u7565\uff08credential policy\uff09<\/strong>\uff0c\u751a\u81f3\u8de8\u7a0b\u5e8f\u5171\u4eab\u9019\u4e9b\u4fe1\u606f\u3002\u9019\u5c07\u5141\u8a31\u7a0b\u5e8f\u548c\u7db2\u7d61\u57fa\u790e\u6846\u67b6\u4e4b\u9593\u76f8\u4e92\u7368\u7acb\uff0c\u4e0d\u6703\u767c\u751f\u5e72\u64fe\u3002\u6bcf\u500bNSURLSession<\/code> \u5c0d\u8c61\u90fd\u7531\u4e00\u500b NSURLSessionConfiguration<\/code> \u5c0d\u8c61\u4f86\u9032\u884c\u521d\u59cb\u5316\uff0c\u5f8c\u8005\u6307\u5b9a\u4e86\u525b\u624d\u63d0\u5230\u7684\u90a3\u4e9b\u7b56\u7565\u4ee5\u53ca\u4e00\u4e9b\u7528\u4f86\u589e\u5f37\u79fb\u52d5\u8a2d\u5099\u4e0a\u6027\u80fd\u7684\u65b0\u9078\u9805\u3002<\/p>\n

NSURLSession<\/code> \u4e2d\u53e6\u4e00\u5927\u584a\u5c31\u662f session task\u3002\u5b83\u8ca0\u8cac\u8655\u7406\u6578\u64da\u7684\u52a0\u8f09\u4ee5\u53ca\u6587\u4ef6\u548c\u6578\u64da\u5728\u5ba2\u6236\u7aef\u8207\u670d\u52d9\u7aef\u4e4b\u9593\u7684\u4e0a\u50b3\u548c\u4e0b\u8f09\u3002NSURLSessionTask<\/code> \u8207 NSURLConnection<\/code> \u6700\u5927\u7684\u76f8\u4f3c\u4e4b\u8655\u5728\u65bc\u5b83\u4e5f\u8ca0\u8cac\u6578\u64da\u7684\u52a0\u8f09\uff0c\u6700\u5927\u7684\u4e0d\u540c\u4e4b\u8655\u5728\u65bc\u6240\u6709\u7684 task \u5171\u4eab\u5176\u5275\u9020\u8005 NSURLSession<\/code> \u9019\u4e00\u516c\u5171\u59d4\u8a17\u8005\uff08common delegate\uff09<\/strong>\u3002<\/p>\n

\u6211\u5011\u5148\u4f86\u6df1\u5165\u63a2\u8a0e task\uff0c\u904e\u5f8c\u518d\u4f86\u8a0e\u8ad6 NSURLSessionConfiguration<\/code>\u3002<\/p>\n

NSURLSessionTask<\/h2>\n

NSURLsessionTask<\/code> \u662f\u4e00\u500b\u62bd\u8c61\u985e\uff0c\u5176\u4e0b\u6709 3 \u500b\u5be6\u9ad4\u5b50\u985e\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff1aNSURLSessionDataTask<\/code>\u3001NSURLSessionUploadTask<\/code>\u3001NSURLSessionDownloadTask<\/code>\u3002\u9019 3 \u500b\u5b50\u985e\u5c01\u88dd\u4e86\u73fe\u4ee3\u7a0b\u5e8f\u4e09\u500b\u6700\u57fa\u672c\u7684\u7db2\u7d61\u4efb\u52d9\uff1a\u7372\u53d6\u6578\u64da\uff0c\u6bd4\u5982 JSON \u6216\u8005 XML\uff0c\u4e0a\u50b3\u6587\u4ef6\u548c\u4e0b\u8f09\u6587\u4ef6\u3002<\/p>\n

\"NSURLSessionTask<\/p>\n

\u7576\u4e00\u500b NSURLSessionDataTask<\/code> \u5b8c\u6210\u6642\uff0c\u5b83\u6703\u5e36\u6709\u76f8\u95dc\u806f\u7684\u6578\u64da\uff0c\u800c\u4e00\u500b NSURLSessionDownloadTask<\/code> \u4efb\u52d9\u7d50\u675f\u6642\uff0c\u5b83\u6703\u5e36\u56de\u5df2\u4e0b\u8f09\u6587\u4ef6\u7684\u4e00\u500b\u81e8\u6642\u7684\u6587\u4ef6\u8def\u5f91\u3002\u56e0\u70ba\u4e00\u822c\u4f86\u8aaa\uff0c\u670d\u52d9\u7aef\u5c0d\u65bc\u4e00\u500b\u4e0a\u50b3\u4efb\u52d9\u7684\u97ff\u61c9\u4e5f\u6703\u6709\u76f8\u95dc\u6578\u64da\u8fd4\u56de\uff0c\u6240\u4ee5NSURLSessionUploadTask<\/code> \u7e7c\u627f\u81ea NSURLSessionDataTask<\/code>\u3002<\/p>\n

\u6240\u6709\u7684 task \u90fd\u662f\u53ef\u4ee5\u53d6\u6d88\uff0c\u66ab\u505c\u6216\u8005\u6062\u5fa9\u7684\u3002\u7576\u4e00\u500b download task \u53d6\u6d88\u6642\uff0c\u53ef\u4ee5\u901a\u904e\u9078\u9805\u4f86\u5275\u5efa\u4e00\u500b\u6062\u8907\u6578\u64da\uff08resume data\uff09<\/strong>\uff0c\u7136\u5f8c\u53ef\u4ee5\u50b3\u905e\u7d66\u4e0b\u4e00\u6b21\u65b0\u5275\u5efa\u7684 download task\uff0c\u4ee5\u4fbf\u7e7c\u7e8c\u4e4b\u524d\u7684\u4e0b\u8f09\u3002<\/p>\n

\u4e0d\u540c\u65bc\u76f4\u63a5\u4f7f\u7528 alloc-init<\/code> \u521d\u59cb\u5316\u65b9\u6cd5\uff0ctask \u662f\u7531\u4e00\u500b NSURLSession<\/code> \u5275\u5efa\u7684\u3002\u6bcf\u500b task \u7684\u69cb\u9020\u65b9\u6cd5\u90fd\u5c0d\u61c9\u6709\u6216\u8005\u6c92\u6709completionHandler<\/code> \u9019\u500b block \u7684\u5169\u500b\u7248\u672c\uff0c\u4f8b\u5982\uff1a\u6709\u9019\u6a23\u5169\u500b\u69cb\u9020\u65b9\u6cd5 \u2013dataTaskWithRequest:<\/code> \u548c \u2013dataTaskWithRequest:completionHandler:<\/code>\u3002\u9019\u8207 NSURLConnection<\/code> \u7684 -sendAsynchronousRequest:queue:completionHandler:<\/code> \u65b9\u6cd5\u985e\u4f3c\uff0c\u901a\u904e\u6307\u5b9a completionHandler<\/code> \u9019\u500b block \u5c07\u5275\u5efa\u4e00\u500b\u96b1\u5f0f\u7684 delegate\uff0c\u4f86\u66ff\u4ee3\u8a72 task \u539f\u4f86\u7684 delegate\u2014\u2014session\u3002\u5c0d\u65bc\u9700\u8981 override \u539f\u6709 session task \u7684 delegate \u7684\u9ed8\u8a8d\u884c\u70ba\u7684\u60c5\u6cc1\uff0c\u6211\u5011\u9700\u8981\u4f7f\u7528\u9019\u7a2e\u4e0d\u5e36 completionHandler<\/code> \u7684\u7248\u672c\u3002<\/p>\n

NSURLSessionTask \u7684\u5de5\u5ee0\u65b9\u6cd5<\/h3>\n

\u5728 iOS 5 \u4e2d\uff0cNSURLConnection<\/code> \u6dfb\u52a0\u4e86 sendAsynchronousRequest:queue:completionHandler:<\/code> \u9019\u4e00\u65b9\u6cd5\uff0c\u5c0d\u65bc\u4e00\u6b21\u6027\u4f7f\u7528\u7684 request\uff0c \u5927\u5927\u5730\u7c21\u5316\u4ee3\u78bc\uff0c\u540c\u6642\u5b83\u4e5f\u662f sendSynchronousRequest:returningResponse:error:<\/code> \u9019\u500b\u65b9\u6cd5\u7684\u7570\u6b65\u66ff\u4ee3\u54c1\uff1a<\/p>\n

 NSURL<\/span> *URL = [NSURL<\/span> URLWithString:@\"http:\/\/example.com\"<\/span>];\r\n NSURLRequest<\/span> *request = [NSURLRequest<\/span> requestWithURL:URL];\r\n\r\n [NSURLConnection<\/span> sendAsynchronousRequest:request\r\n                                    queue:[NSOperationQueue mainQueue]\r\n                        completionHandler:^(NSURLResponse *response, NSData<\/span> *data, NSError<\/span> *error) {\r\n     \/\/ ...<\/span>\r\n }];\r\n<\/code><\/pre>\n
NSURLSession<\/code> \u5728 task \u7684\u69cb\u9020\u65b9\u6cd5\u4e0a\u5ef6\u7e8c\u4e86\u9019\u4e00\u6a21\u5f0f\u3002\u4e0d\u540c\u7684\u662f\uff0c\u9019\u88e1\u4e0d\u6703\u7acb\u5373\u904b\u884c task\uff0c\u800c\u662f\u5c07\u8a72 task \u5c0d\u8c61\u5148\u8fd4\u56de\uff0c\u5141\u8a31\u6211\u5011\u9032\u4e00\u6b65\u7684\u914d\u7f6e\uff0c\u7136\u5f8c\u53ef\u4ee5\u4f7f\u7528 resume<\/code> \u65b9\u6cd5\u4f86\u8b93\u5b83\u958b\u59cb\u904b\u884c\u3002<\/p>\n
Data task \u53ef\u4ee5\u901a\u904e NSURL<\/code> \u6216 NSURLRequest<\/code> \u5275\u5efa\uff08\u4f7f\u7528\u524d\u8005\u76f8\u7576\u65bc\u662f\u4f7f\u7528\u4e00\u500b\u5c0d\u65bc\u8a72 URL \u9032\u884c\u6a19\u6e96 GET<\/code> \u8acb\u6c42\u7684NSURLRequest<\/code>\uff0c\u9019\u662f\u4e00\u7a2e\u5feb\u6377\u65b9\u6cd5\uff09\uff1a<\/p>\n
 NSURL<\/span> *URL = [NSURL<\/span> URLWithString:@\"http:\/\/example.com\"<\/span>];\r\n NSURLRequest<\/span> *request = [NSURLRequest<\/span> requestWithURL:URL];\r\n\r\n NSURLSession<\/span> *session = [NSURLSession<\/span> sharedSession];\r\n NSURLSessionDataTask<\/span> *task = [session dataTaskWithRequest:request\r\n                                         completionHandler:\r\n     ^(NSData<\/span> *data, NSURLResponse *response, NSError<\/span> *error) {\r\n         \/\/ ...<\/span>\r\n     }];\r\n\r\n [task resume];\r\n<\/code><\/pre>\n
Upload task \u7684\u5275\u5efa\u9700\u8981\u4f7f\u7528\u4e00\u500b request\uff0c\u53e6\u5916\u52a0\u4e0a\u4e00\u500b\u8981\u4e0a\u50b3\u7684 NSData<\/code> \u5c0d\u8c61\u6216\u8005\u662f\u4e00\u500b\u672c\u5730\u6587\u4ef6\u7684\u8def\u5f91\u5c0d\u61c9\u7684 NSURL<\/code>\uff1a<\/p>\n
 NSURL<\/span> *URL = [NSURL<\/span> URLWithString:@\"http:\/\/example.com\/upload\"<\/span>];\r\n NSURLRequest<\/span> *request = [NSURLRequest<\/span> requestWithURL:URL];\r\n NSData<\/span> *data = ...;\r\n\r\n NSURLSession<\/span> *session = [NSURLSession<\/span> sharedSession];\r\n NSURLSessionUploadTask<\/span> *uploadTask = [session uploadTaskWithRequest:request\r\n                                                            fromData:data\r\n                                                   completionHandler:\r\n     ^(NSData<\/span> *data, NSURLResponse *response, NSError<\/span> *error) {\r\n         \/\/ ...<\/span>\r\n     }];\r\n\r\n [uploadTask resume];\r\n<\/code><\/pre>\n
Download task \u4e5f\u9700\u8981\u4e00\u500b request\uff0c\u4e0d\u540c\u4e4b\u8655\u5728\u65bc completionHandler<\/code> \u9019\u500b block\u3002Data task \u548c upload task \u6703\u5728\u4efb\u52d9\u5b8c\u6210\u6642\u4e00\u6b21\u6027\u8fd4\u56de\uff0c\u4f46\u662f Download task \u662f\u5c07\u6578\u64da\u4e00\u9ede\u9ede\u5730\u5beb\u5165\u672c\u5730\u7684\u81e8\u6642\u6587\u4ef6\u3002\u6240\u4ee5\u5728 completionHandler<\/code> \u9019\u500b block \u88e1\uff0c\u6211\u5011\u9700\u8981\u628a\u6587\u4ef6\u5f9e\u4e00\u500b\u81e8\u6642\u5730\u5740\u79fb\u52d5\u5230\u4e00\u500b\u6c38\u4e45\u7684\u5730\u5740\u4fdd\u5b58\u8d77\u4f86\uff1a<\/p>\n
 NSURL<\/span> *URL = [NSURL<\/span> URLWithString:@\"http:\/\/example.com\/file.zip\"<\/span>];\r\n NSURLRequest<\/span> *request = [NSURLRequest<\/span> requestWithURL:URL];\r\n\r\n NSURLSession<\/span> *session = [NSURLSession<\/span> sharedSession];\r\n NSURLSessionDownloadTask<\/span> *downloadTask = [session downloadTaskWithRequest:request\r\n                                                         completionHandler:\r\n    ^(NSURL<\/span> *location, NSURLResponse *response, NSError<\/span> *error) {\r\n        NSString<\/span> *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES<\/span>) firstObject];\r\n        NSURL<\/span> *documentsDirectoryURL = [NSURL<\/span> fileURLWithPath:documentsPath];\r\n        NSURL<\/span> *newFileLocation = [documentsDirectoryURL URLByAppendingPathComponent:[[response URL] lastPathComponent]];\r\n        [[NSFileManager<\/span> defaultManager] copyItemAtURL:location toURL:newFileLocation error:nil<\/span>];\r\n    }];\r\n\r\n [downloadTask resume];\r\n<\/code><\/pre>\n
\u7de8\u8005\u6ce8<\/span> \u539f\u6587\u4e2d\u9019\u584a\u4ee3\u78bc\u4ee5\u53ca\u4e0a\u6587\u7684\u8868\u8ff0\u4e2d\u5b58\u6709\u4e00\u4e9b\u554f\u984c\uff0c\u8a73\u898b\u9019\u500b issue<\/a>\uff0c\u672c\u6587\u5df2\u9032\u884c\u66f4\u6b63\uff0c\u5982\u679c\u60a8\u6709\u4e0d\u540c\u610f\u898b\uff0c\u6b61\u8fce\u5728Github<\/a> \u4e0a\u7d66\u6211\u5011\u53cd\u994b\u3002<\/p><\/blockquote>\n
NSURLSession \u8207 NSURLConnection \u7684 delegate \u65b9\u6cd5<\/h3>\n
\u7e3d\u9ad4\u800c\u8a00\uff0cNSURLSession<\/code> \u7684 delegate \u65b9\u6cd5\u662f NSURLConnection<\/code> \u7684\u6f14\u5316\u7684\u5341\u5e74\u4e2d\u5c0d\u65bc ad-hoc \u6a21\u5f0f\u7684\u4e00\u500b\u986f\u8457\u6539\u5584\u3002\u60a8\u53ef\u4ee5\u67e5\u770b\u9019\u500b\u6620\u5c04\u8868<\/a>\u4f86\u9032\u884c\u4e00\u500b\u5b8c\u6574\u7684\u6982\u89bd\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u9ad4\u7684\u89c0\u5bdf\uff1a<\/p>\n
NSURLSession<\/code> \u65e2\u64c1\u6709 seesion \u7684 delegate \u65b9\u6cd5\uff0c\u53c8\u64c1\u6709 task \u7684 delegate \u65b9\u6cd5\u7528\u4f86\u8655\u7406\u9451\u6b0a\u67e5\u8a62\u3002session \u7684 delegate \u65b9\u6cd5\u8655\u7406\u9023\u63a5\u5c64\u7684\u554f\u984c\uff0c\u8af8\u5982\u670d\u52d9\u5668\u4fe1\u4efb\uff0c\u5ba2\u6236\u7aef\u8b49\u66f8\u7684\u8a55\u4f30\uff0cNTLM<\/a> \u548c Kerberos<\/a> \u5354\u8b70\u9019\u985e\u554f\u984c\uff0c\u800c task \u7684 delegate \u5247\u8655\u7406\u4ee5\u7db2\u7d61\u8acb\u6c42\u70ba\u57fa\u790e\u7684\u554f\u984c\uff0c\u5982 Basic\uff0cDigest\uff0c\u4ee5\u53ca\u4ee3\u7406\u8eab\u4efd\u9a57\u8b49\uff08Proxy authentication\uff09<\/strong>\u7b49\u3002<\/p>\n
\u5728 NSURLConnection<\/code> \u4e2d\u6709\u5169\u500b delegate \u65b9\u6cd5\u53ef\u4ee5\u8868\u660e\u4e00\u500b\u7db2\u7d61\u8acb\u6c42\u5df2\u7d93\u7d50\u675f\uff1aNSURLConnectionDataDelegate<\/code> \u4e2d\u7684 -connectionDidFinishLoading:<\/code> \u548c NSURLConnectionDelegate<\/code> \u4e2d\u7684 -connection:didFailWithError:<\/code>\uff0c\u800c\u5728 NSURLSession<\/code>\u4e2d\u6539\u70ba\u4e00\u500b delegate \u65b9\u6cd5\uff1aNSURLSessionTaskDelegate<\/code> \u7684 -URLSession:task:didCompleteWithError:<\/code><\/p>\n
NSURLSession<\/code> \u4e2d\u8868\u793a\u50b3\u8f38\u591a\u5c11\u5b57\u7bc0\u7684\u53c3\u6578\u985e\u578b\u73fe\u5728\u6539\u70ba int64_t<\/code>\uff0c\u4ee5\u524d\u5728 NSURLConnection<\/code> \u4e2d\u76f8\u61c9\u7684\u53c3\u6578\u7684\u985e\u578b\u662f long long<\/code>\u3002<\/p>\n
\u7531\u65bc\u589e\u52a0\u4e86 completionHandler:<\/code> \u9019\u500b block \u4f5c\u70ba\u53c3\u6578\uff0cNSURLSession<\/code> \u5be6\u969b\u4e0a\u7d66 Foundation \u6846\u67b6\u5f15\u5165\u4e86\u4e00\u7a2e\u5168\u65b0\u7684\u6a21\u5f0f\u3002\u9019\u7a2e\u6a21\u5f0f\u5141\u8a31 delegate \u65b9\u6cd5\u53ef\u4ee5\u5b89\u5168\u5730\u5728\u4e3b\u7dda\u7a0b\u8207\u904b\u884c\uff0c\u800c\u4e0d\u6703\u963b\u585e\u4e3b\u7dda\u7a0b\uff1bDelgate \u53ea\u9700\u8981\u7c21\u55ae\u5730\u8abf\u7528 dispatch_async<\/code> \u5c31\u53ef\u4ee5\u5207\u63db\u5230\u5f8c\u53f0\u9032\u884c\u76f8\u95dc\u7684\u64cd\u4f5c\uff0c\u7136\u5f8c\u5728\u64cd\u4f5c\u5b8c\u6210\u6642\u8abf\u7528 completionHandler<\/code> \u5373\u53ef\u3002\u540c\u6642\uff0c\u5b83\u9084\u53ef\u4ee5\u6709\u6548\u5730\u64c1\u6709\u591a\u500b\u8fd4\u56de\u503c\uff0c\u800c\u4e0d\u9700\u8981\u6211\u5011\u4f7f\u7528\u7b28\u62d9\u7684\u53c3\u6578\u6307\u91dd\u3002\u4ee5 NSURLSessionTaskDelegate<\/code> \u7684 -URLSession:task:didReceiveChallenge:completionHandler:<\/code> \u65b9\u6cd5\u4f86\u8209\u4f8b\uff0ccompletionHandler<\/code> \u63a5\u53d7\u5169\u500b\u53c3\u6578\uff1aNSURLSessionAuthChallengeDisposition<\/code> \u548c NSURLCredential<\/code>\uff0c\u524d\u8005\u70ba\u61c9\u5c0d\u9451\u6b0a\u67e5\u8a62\u7684\u7b56\u7565\uff0c\u5f8c\u8005\u70ba\u9700\u8981\u4f7f\u7528\u7684\u8b49\u66f8\uff08\u50c5\u7576\u524d\u8005\u2014\u2014\u61c9\u5c0d\u9451\u6b0a\u67e5\u8a62\u7684\u7b56\u7565\u70ba\u4f7f\u7528\u8b49\u66f8\uff0c\u5373NSURLSessionAuthChallengeUseCredential<\/code> \u6642\u6709\u6548\uff0c\u5426\u5247\u8a72\u53c3\u6578\u70ba NULL<\/code>\uff09<\/p>\n
\u60f3\u8981\u67e5\u770b\u66f4\u591a\u95dc\u65bc session task \u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u67e5\u770b WWDC Session 705: \"What's New in Foundation Networking\"<\/a><\/p><\/blockquote>\n
NSURLSessionConfiguration<\/h2>\n
NSURLSessionConfiguration<\/code> \u5c0d\u8c61\u7528\u65bc\u5c0d NSURLSession<\/code> \u5c0d\u8c61\u9032\u884c\u521d\u59cb\u5316\u3002NSURLSessionConfiguration<\/code> \u5c0d\u4ee5\u524dNSMutableURLRequest<\/code> \u6240\u63d0\u4f9b\u7684\u7db2\u7d61\u8acb\u6c42\u5c64\u7684\u8a2d\u7f6e\u9078\u9805<\/a>\u9032\u884c\u4e86\u64f4\u5145\uff0c\u63d0\u4f9b\u7d66\u6211\u5011\u76f8\u7576\u5927\u7684\u9748\u6d3b\u6027\u548c\u63a7\u5236\u6b0a\u3002\u5f9e\u6307\u5b9a\u53ef\u7528\u7db2\u7d61\uff0c\u5230 cookie\uff0c\u5b89\u5168\u6027\uff0c\u7de9\u5b58\u7b56\u7565\uff0c\u518d\u5230\u4f7f\u7528\u81ea\u5b9a\u7fa9\u5354\u8b70\uff0c\u555f\u52d5\u4e8b\u4ef6\u7684\u8a2d\u7f6e\uff0c\u4ee5\u53ca\u7528\u65bc\u79fb\u52d5\u8a2d\u5099\u512a\u5316\u7684\u5e7e\u500b\u65b0\u5c6c\u6027\uff0c\u4f60\u6703\u767c\u73fe\u4f7f\u7528NSURLSessionConfiguration<\/code> \u53ef\u4ee5\u627e\u5230\u5e7e\u4e4e\u4efb\u4f55\u4f60\u60f3\u8981\u9032\u884c\u914d\u7f6e\u7684\u9078\u9805\u3002<\/p>\n
NSURLSession<\/code> \u5728\u521d\u59cb\u5316\u6642\u6703\u628a\u914d\u7f6e\u5b83\u7684 NSURLSessionConfiguration<\/code> \u5c0d\u8c61\u9032\u884c\u4e00\u6b21 copy\uff0c\u4e26\u4fdd\u5b58\u5230\u81ea\u5df1\u7684 configuration<\/code> \u5c6c\u6027\u4e2d\uff0c\u800c\u4e14\u9019\u500b\u5c6c\u6027\u662f\u53ea\u8b80\u7684\u3002\u56e0\u6b64\u4e4b\u5f8c\u518d\u4fee\u6539\u6700\u521d\u914d\u7f6e session \u7684\u90a3\u500b configuration \u5c0d\u8c61\u5c0d\u65bc session \u662f\u6c92\u6709\u5f71\u97ff\u7684\u3002\u4e5f\u5c31\u662f\u8aaa\uff0cconfiguration \u53ea\u5728\u521d\u59cb\u5316\u6642\u88ab\u8b80\u53d6\u4e00\u6b21\uff0c\u4e4b\u5f8c\u90fd\u662f\u4e0d\u6703\u8b8a\u5316\u7684\u3002<\/p>\n
NSURLSessionConfiguration \u7684\u5de5\u5ee0\u65b9\u6cd5<\/h3>\n
NSURLSessionConfiguration<\/code> \u6709\u4e09\u500b\u985e\u5de5\u5ee0\u65b9\u6cd5\uff0c\u9019\u5f88\u597d\u5730\u8aaa\u660e\u4e86 NSURLSession<\/code> \u8a2d\u8a08\u6642\u6240\u8003\u616e\u7684\u4e0d\u540c\u7684\u4f7f\u7528\u5834\u666f\u3002<\/p>\n
+defaultSessionConfiguration<\/code> \u8fd4\u56de\u4e00\u500b\u6a19\u6e96\u7684 configuration\uff0c\u9019\u500b\u914d\u7f6e\u5be6\u969b\u4e0a\u8207 NSURLConnection<\/code> \u7684\u7db2\u7d61\u5806\u68e7\uff08networking stack\uff09<\/strong>\u662f\u4e00\u6a23\u7684\uff0c\u5177\u6709\u76f8\u540c\u7684\u5171\u4eab NSHTTPCookieStorage<\/code>\uff0c\u5171\u4eab NSURLCache<\/code> \u548c\u5171\u4eabNSURLCredentialStorage<\/code>\u3002<\/p>\n
+ephemeralSessionConfiguration<\/code> \u8fd4\u56de\u4e00\u500b\u9810\u8a2d\u914d\u7f6e\uff0c\u9019\u500b\u914d\u7f6e\u4e2d\u4e0d\u6703\u5c0d\u7de9\u5b58\uff0cCookie \u548c\u8b49\u66f8\u9032\u884c\u6301\u4e45\u6027\u7684\u5b58\u5132\u3002\u9019\u5c0d\u65bc\u5be6\u73fe\u50cf\u79d8\u5bc6\u700f\u89bd\u9019\u7a2e\u529f\u80fd\u4f86\u8aaa\u662f\u5f88\u7406\u60f3\u7684\u3002<\/p>\n
+backgroundSessionConfiguration:(NSString *)identifier<\/code> \u7684\u7368\u7279\u4e4b\u8655\u5728\u65bc\uff0c\u5b83\u6703\u5275\u5efa\u4e00\u500b\u5f8c\u53f0 session<\/em>\u3002\u5f8c\u53f0 session \u4e0d\u540c\u65bc\u5e38\u898f\u7684\uff0c\u666e\u901a\u7684 session\uff0c\u5b83\u751a\u81f3\u53ef\u4ee5\u5728\u61c9\u7528\u7a0b\u5e8f\u639b\u8d77\uff0c\u9000\u51fa\u6216\u8005\u5d29\u6f70\u7684\u60c5\u6cc1\u4e0b\u904b\u884c\u4e0a\u50b3\u548c\u4e0b\u8f09\u4efb\u52d9\u3002\u521d\u59cb\u5316\u6642\u6307\u5b9a\u7684\u6a19\u8b58\u7b26\uff0c\u88ab\u7528\u65bc\u5411\u4efb\u4f55\u53ef\u80fd\u5728\u9032\u7a0b\u5916\u6062\u5fa9\u5f8c\u53f0\u50b3\u8f38\u7684\u5b88\u8b77\u9032\u7a0b\uff08daemon\uff09<\/strong>\u63d0\u4f9b\u4e0a\u4e0b\u6587\u3002<\/p>\n
\u60f3\u8981\u67e5\u770b\u66f4\u591a\u95dc\u65bc\u5f8c\u53f0 session \u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u67e5\u770b WWDC Session 204: \"What's New with Multitasking\"<\/a><\/p>\n
\u914d\u7f6e\u5c6c\u6027<\/h3>\n
NSURLSessionConfiguration<\/code> \u64c1\u6709 20 \u500b\u914d\u7f6e\u5c6c\u6027\u3002\u719f\u7df4\u638c\u63e1\u9019\u4e9b\u914d\u7f6e\u5c6c\u6027\u7684\u7528\u8655\uff0c\u53ef\u4ee5\u8b93\u61c9\u7528\u7a0b\u5e8f\u5145\u5206\u5730\u5229\u7528\u5176\u7db2\u7d61\u74b0\u5883\u3002<\/p>\n
\u57fa\u672c\u914d\u7f6e<\/h4>\n
HTTPAdditionalHeaders<\/code> \u6307\u5b9a\u4e86\u4e00\u7d44\u9ed8\u8a8d\u7684\u53ef\u4ee5\u8a2d\u7f6e\u51fa\u7ad9\u8acb\u6c42\uff08outbound request\uff09<\/strong>\u7684\u6578\u64da\u982d\u3002\u9019\u5c0d\u65bc\u8de8 session \u5171\u4eab\u4fe1\u606f\uff0c\u5982\u5167\u5bb9\u985e\u578b\uff0c\u8a9e\u8a00\uff0c\u7528\u6236\u4ee3\u7406\u548c\u8eab\u4efd\u8a8d\u8b49\uff0c\u662f\u5f88\u6709\u7528\u7684\u3002<\/p>\n
NSString<\/span> *userPasswordString = [NSString<\/span> stringWithFormat:@\"%@:%@\"<\/span>, user, password];\r\nNSData<\/span> * userPasswordData = [userPasswordString dataUsingEncoding:NSUTF8StringEncoding];\r\nNSString<\/span> *base64EncodedCredential = [userPasswordData base64EncodedStringWithOptions:0<\/span>];\r\nNSString<\/span> *authString = [NSString<\/span> stringWithFormat:@\"Basic %@\"<\/span>, base64EncodedCredential];\r\nNSString<\/span> *userAgentString = @\"AppName\/com.example.app (iPhone 5s; iOS 7.0.2; Scale\/2.0)\"<\/span>;\r\n\r\nconfiguration.HTTPAdditionalHeaders<\/span> = @{@\"Accept\"<\/span>: @\"application\/json\"<\/span>,\r\n                                        @\"Accept-Language\"<\/span>: @\"en\"<\/span>,\r\n                                        @\"Authorization\"<\/span>: authString,\r\n                                        @\"User-Agent\"<\/span>: userAgentString};\r\n<\/code><\/pre>\n
networkServiceType<\/code> \u5c0d\u6a19\u6e96\u7684\u7db2\u7d61\u6d41\u91cf\uff0c\u7db2\u7d61\u96fb\u8a71\uff0c\u8a9e\u97f3\uff0c\u8996\u983b\uff0c\u4ee5\u53ca\u7531\u4e00\u500b\u5f8c\u53f0\u9032\u7a0b\u4f7f\u7528\u7684\u6d41\u91cf\u9032\u884c\u4e86\u5340\u5206\u3002\u5927\u591a\u6578\u61c9\u7528\u7a0b\u5e8f\u90fd\u4e0d\u9700\u8981\u8a2d\u7f6e\u9019\u500b\u3002<\/p>\n
allowsCellularAccess<\/code> \u548c discretionary<\/code> \u88ab\u7528\u65bc\u7bc0\u7701\u901a\u904e\u8702\u7aa9\u7db2\u7d61\u9023\u63a5\u7684\u5e36\u5bec\u3002\u5c0d\u65bc\u5f8c\u53f0\u50b3\u8f38\u7684\u60c5\u6cc1\uff0c\u63a8\u85a6\u5927\u5bb6\u4f7f\u7528discretionary<\/code> \u9019\u500b\u5c6c\u6027\uff0c\u800c\u4e0d\u662f allowsCellularAccess<\/code>\uff0c\u56e0\u70ba\u524d\u8005\u6703\u628a WiFi \u548c\u96fb\u6e90\u7684\u53ef\u7528\u6027\u8003\u616e\u5728\u5167\u3002<\/p>\n
timeoutIntervalForRequest<\/code> \u548c timeoutIntervalForResource<\/code> \u5206\u5225\u6307\u5b9a\u4e86\u5c0d\u65bc\u8acb\u6c42\u548c\u8cc7\u6e90\u7684\u8d85\u6642\u9593\u9694\u3002\u8a31\u591a\u958b\u767c\u4eba\u54e1\u8a66\u5716\u4f7f\u7528timeoutInterval<\/code> \u53bb\u9650\u5236\u767c\u9001\u8acb\u6c42\u7684\u7e3d\u6642\u9593\uff0c\u4f46\u5176\u5be6\u5b83\u771f\u6b63\u7684\u542b\u7fa9\u662f\uff1a\u5206\u7d44\uff08packet\uff09<\/strong>\u4e4b\u9593\u7684\u6642\u9593\u3002\u5be6\u969b\u4e0a\u6211\u5011\u61c9\u8a72\u4f7f\u7528timeoutIntervalForResource<\/code> \u4f86\u898f\u5b9a\u6574\u9ad4\u8d85\u6642\u7684\u7e3d\u6642\u9593\uff0c\u4f46\u61c9\u8a72\u53ea\u5c07\u5176\u7528\u65bc\u5f8c\u53f0\u50b3\u8f38\uff0c\u800c\u4e0d\u662f\u7528\u6236\u5be6\u969b\u4e0a\u53ef\u80fd\u60f3\u8981\u53bb\u7b49\u5f85\u7684\u4efb\u4f55\u6771\u897f\u3002<\/p>\n
HTTPMaximumConnectionsPerHost<\/code> \u662f Foundation \u6846\u67b6\u4e2d URL \u52a0\u8f09\u7cfb\u7d71\u7684\u4e00\u500b\u65b0\u7684\u914d\u7f6e\u9078\u9805\u3002\u5b83\u66fe\u7d93\u88ab NSURLConnection<\/code> \u7528\u65bc\u7ba1\u7406\u79c1\u6709\u7684\u9023\u63a5\u6c60\u3002\u73fe\u5728\u6709\u4e86 NSURLSession<\/code>\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u9700\u8981\u6642\u9650\u5236\u9023\u63a5\u5230\u7279\u5b9a\u4e3b\u6a5f\u7684\u6578\u91cf\u3002<\/p>\n
sessionSendsLaunchEvents<\/code> \u662f\u53e6\u4e00\u500b\u65b0\u7684\u5c6c\u6027\uff0c\u8a72\u5c6c\u6027\u6307\u5b9a\u8a72 session \u662f\u5426\u61c9\u8a72\u5f9e\u5f8c\u53f0\u555f\u52d5\u3002<\/p>\n
connectionProxyDictionary<\/code> \u6307\u5b9a\u4e86 session \u9023\u63a5\u4e2d\u7684\u4ee3\u7406\u670d\u52d9\u5668\u3002\u540c\u6a23\u5730\uff0c\u5927\u591a\u6578\u9762\u5411\u6d88\u8cbb\u8005\u7684\u61c9\u7528\u7a0b\u5e8f\u90fd\u4e0d\u9700\u8981\u4ee3\u7406\uff0c\u6240\u4ee5\u57fa\u672c\u4e0a\u4e0d\u9700\u8981\u914d\u7f6e\u9019\u500b\u5c6c\u6027\u3002<\/p>\n
\u95dc\u65bc\u9023\u63a5\u4ee3\u7406\u7684\u66f4\u591a\u4fe1\u606f\u53ef\u4ee5\u5728 CFProxySupport<\/code> Reference<\/a> \u627e\u5230\u3002<\/p><\/blockquote>\n
Cookie \u7b56\u7565<\/h4>\n
HTTPCookieStorage<\/code> \u5b58\u5132\u4e86 session \u6240\u4f7f\u7528\u7684 cookie\u3002\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\u6703\u4f7f\u7528 NSHTTPCookieShorage<\/code> \u7684+sharedHTTPCookieStorage<\/code> \u9019\u500b\u55ae\u4f8b\u5c0d\u8c61\uff0c\u9019\u8207 NSURLConnection<\/code> \u662f\u76f8\u540c\u7684\u3002<\/p>\n
HTTPCookieAcceptPolicy<\/code> \u6c7a\u5b9a\u4e86\u4ec0\u9ebc\u60c5\u6cc1\u4e0b session \u61c9\u8a72\u63a5\u53d7\u5f9e\u670d\u52d9\u5668\u767c\u51fa\u7684 cookie\u3002<\/p>\n
HTTPShouldSetCookies<\/code> \u6307\u5b9a\u4e86\u8acb\u6c42\u662f\u5426\u61c9\u8a72\u4f7f\u7528 session \u5b58\u5132\u7684 cookie\uff0c\u5373 HTTPCookieSorage<\/code> \u5c6c\u6027\u7684\u503c\u3002<\/p>\n
\u5b89\u5168\u7b56\u7565<\/h4>\n
URLCredentialStorage<\/code> \u5b58\u5132\u4e86 session \u6240\u4f7f\u7528\u7684\u8b49\u66f8\u3002\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\u6703\u4f7f\u7528 NSURLCredentialStorage<\/code> \u7684+sharedCredentialStorage<\/code> \u9019\u500b\u55ae\u4f8b\u5c0d\u8c61\uff0c\u9019\u8207 NSURLConnection<\/code> \u662f\u76f8\u540c\u7684\u3002<\/p>\n
TLSMaximumSupportedProtocol<\/code> \u548c TLSMinimumSupportedProtocol<\/code> \u78ba\u5b9a session \u662f\u5426\u652f\u6301 SSL \u5354\u8b70<\/a>\u3002<\/p>\n
\u7de9\u5b58\u7b56\u7565<\/h4>\n
URLCache<\/code> \u662f session \u4f7f\u7528\u7684\u7de9\u5b58\u3002\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\u6703\u4f7f\u7528 NSURLCache<\/code> \u7684 +sharedURLCache<\/code> \u9019\u500b\u55ae\u4f8b\u5c0d\u8c61\uff0c\u9019\u8207 NSURLConnection<\/code>\u662f\u76f8\u540c\u7684\u3002<\/p>\n
requestCachePolicy<\/code> specifies when a cached response should be returned for a request. This is equivalent toNSURLRequest -cachePolicy<\/code>.<\/p>\n
requestCachePolicy<\/code> \u6307\u5b9a\u4e86\u4e00\u500b\u8acb\u6c42\u7684\u7de9\u5b58\u97ff\u61c9\u61c9\u8a72\u5728\u4ec0\u9ebc\u6642\u5019\u8fd4\u56de\u3002\u9019\u76f8\u7576\u65bc NSURLRequest<\/code> \u7684 -cachePolicy<\/code> \u65b9\u6cd5\u3002<\/p>\n
\u81ea\u5b9a\u7fa9\u5354\u8b70<\/h4>\n
protocolClasses<\/code> \u7528\u4f86\u914d\u7f6e\u7279\u5b9a\u67d0\u500b session \u6240\u4f7f\u7528\u7684\u81ea\u5b9a\u7fa9\u5354\u8b70\uff08\u8a72\u5354\u8b70\u662f NSURLProtocol<\/code> \u7684\u5b50\u985e\uff09\u7684\u6578\u7d44\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
iOS 7 \u548c Mac OS X 10.9 Mavericks \u4e2d URL \u52a0\u8f09\u7cfb\u7d71\u7684\u8b8a\u5316\uff0c\u662f\u5c0d NSURLConnection<\/code> \u9032\u884c\u6df1\u601d\u719f\u616e\u5f8c\u7684\u4e00\u500b\u81ea\u7136\u800c\u7136\u7684\u9032\u5316\u3002\u7e3d\u9ad4\u800c\u8a00\uff0c\u860b\u679c\u7684 Foundation \u6846\u67b6\u5718\u968a\u5e79\u4e86\u4e00\u4ef6\u4ee4\u4eba\u6b3d\u4f69\u7684\u7684\u5de5\u4f5c\uff0c\u4ed6\u5011\u7814\u7a76\u4e26\u9810\u6e2c\u4e86\u79fb\u52d5\u958b\u767c\u8005\u73fe\u6709\u7684\u548c\u65b0\u8208\u7684\u7528\u4f8b\uff0c\u5275\u9020\u4e86\u80fd\u5920\u6eff\u8db3\u65e5\u5e38\u4efb\u52d9\u800c\u4e14\u975e\u5e38\u597d\u7528\u7684 API \u3002<\/p>\n
\u5118\u7ba1\u5728\u9019\u500b\u9ad4\u7cfb\u7d50\u69cb\u4e2d\uff0c\u67d0\u4e9b\u6c7a\u5b9a\u5c0d\u65bc\u53ef\u7d44\u5408\u6027\u548c\u53ef\u64f4\u5c55\u6027\u800c\u8a00\u662f\u4e00\u7a2e\u5012\u9000\uff0c\u4f46\u662f NSURLSession<\/code> \u4ecd\u7136\u662f\u5be6\u73fe\u66f4\u9ad8\u7d1a\u5225\u7db2\u7d61\u529f\u80fd\u7684\u4e00\u500b\u5f37\u5927\u7684\u57fa\u790e\u6846\u67b6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8f49\u8cbc\u4f4d\u5740\uff1ahttp:\/\/objccn.io\/issue-5-4\/ iOS 7 \u548c Mac OS X 10.9  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1875","post","type-post","status-publish","format-standard","hentry","category-12"],"_links":{"self":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1875"}],"collection":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1875"}],"version-history":[{"count":0,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=\/wp\/v2\/posts\/1875\/revisions"}],"wp:attachment":[{"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn-house.idv.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
HTTPShouldUsePipelining<\/code> \u9019\u500b\u5c6c\u6027\u5728 NSMutableURLRequest<\/code> \u4e0b\u4e5f\u6709\uff0c\u5b83\u53ef\u4ee5\u88ab\u7528\u65bc\u958b\u555f HTTP \u7ba1\u7dda\u5316\uff08HTTP pipelining<\/a>\uff09<\/strong>\uff0c\u9019\u53ef\u4ee5\u986f\u8457\u964d\u4f4e\u8acb\u6c42\u7684\u52a0\u8f09\u6642\u9593\uff0c\u4f46\u662f\u7531\u65bc\u6c92\u6709\u88ab\u670d\u52d9\u5668\u5ee3\u6cdb\u652f\u6301\uff0c\u9ed8\u8a8d\u662f\u7981\u7528\u7684\u3002<\/p>\n