開發(fā)培訓(xùn)大神04-多線程網(wǎng)絡(luò)

網(wǎng)絡(luò)

NSURLConnectionMJ

常用類NSURL：請求地址NSURLRequest：一個NSURLRequest對象就代表一個請求，它包含的信息有一個NSURL對象請求方法、請求頭、請求體請求超時…

…NSMutableURLRequest：NSURLRequest的子類NSURLConnection負責(zé)發(fā)送請求，建立客戶端和服務(wù)器的連接發(fā)送數(shù)據(jù)給服務(wù)器，并收集來自服務(wù)器的響應(yīng)數(shù)據(jù)NSURLConnection的使用步驟使用NSURLConnection發(fā)送請求的步驟很簡單創(chuàng)建一個NSURL對象，設(shè)置請求路徑傳入NSURL創(chuàng)建一個NSURLRequest對象，設(shè)置請求頭和請求體使用NSURLConnection發(fā)送請求NSURLRequestNSURL請求頭請求體NSURLConnection服務(wù)器NSURLConnection發(fā)送請求NSURLConnection常見的發(fā)送請求方法有以下幾種同步請求+(NSData*)sendSynchronousRequest:(NSURLRequest*)requestreturningResponse:(NSURLResponse**)responseerror:(NSError**)error;異步請求：根據(jù)對服務(wù)器返回數(shù)據(jù)的處理方式的不同，又可以分為2種block回調(diào)+(void)sendAsynchronousRequest:(NSURLRequest*)request

queue:(NSOperationQueue*)queue

completionHandler:(void(^)(NSURLResponse*response,NSData*data,NSError*connectionError))handler;NSURLConnection發(fā)送請求代理-(id)initWithRequest:(NSURLRequest*)requestdelegate:(id)delegate;+(NSURLConnection*)connectionWithRequest:(NSURLRequest*)requestdelegate:(id)delegate;-(id)initWithRequest:(NSURLRequest*)requestdelegate:(id)delegatestartImmediately:(BOOL)startImmediately;在startImmediately

=

NO的情況下，需要調(diào)用start方法開始發(fā)送請求-(void)start;成為NSURLConnection的代理，最好遵守NSURLConnectionDataDelegate協(xié)議NSURLConnectionDelegateNSURLConnectionDataDelegate協(xié)議中的代理方法開始接收到服務(wù)器的響應(yīng)時調(diào)用-(void)connection:(NSURLConnection*)connectiondidReceiveResponse:(NSURLResponse*)response;接收到服務(wù)器返回的數(shù)據(jù)時調(diào)用（服務(wù)器返回的數(shù)據(jù)比較大時會調(diào)用多次）-(void)connection:(NSURLConnection*)connectiondidReceiveData:(NSData*)data;服務(wù)器返回的數(shù)據(jù)完全接收完畢后調(diào)用-(void)connectionDidFinishLoading:(NSURLConnection*)connection;請求出錯時調(diào)用（比如請求超時）-(void)connection:(NSURLConnection*)connectiondidFailWithError:(NSError*)error;NSMutableURLRequestNSMutableURLRequest是NSURLRequest的子類，常用方法有設(shè)置請求超時等待時間（超過這個時間就算超時，請求失?。?(void)setTimeoutInterval:(NSTimeInterval)seconds;設(shè)置請求方法（比如GET和POST）-(void)setHTTPMethod:(NSString*)method;設(shè)置請求體-(void)setHTTPBody:(NSData*)data;設(shè)置請求頭-(void)setValue:(NSString*)valueforHTTPHeaderField:(NSString*)field;創(chuàng)建GET和POST請求創(chuàng)建GET請求NSString*urlStr=[@"小碼哥&pwd=520it"stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];NSURL*url=[NSURLURLWithString:urlStr];NSMutableURLRequest*request=[NSMutableURLRequestrequestWithURL:url];創(chuàng)建POST請求NSString*urlStr=@"";NSURL*url=[NSURLURLWithString:urlStr];NSMutableURLRequest*request=[NSMutableURLRequestrequestWithURL:url];request.HTTPMethod=@"POST";//請求體NSString*bodyStr=@"username=520it&pwd=520it";request.HTTPBody=[bodyStrdataUsi