Nsurlconnection sending a GET request

1 //VIEWCONTROLLER.M2 //04-Mastering-nsurlconnection sending a GET request3 //4 //Created by Xiaomage on 16/2/22.5 //2016 little brother. All rights reserved.6 //7 8 #import "ViewController.h"9 Ten @interfaceViewcontroller () <NSURLConnectionDataDelegate> One /** Notes*/ A@property (nonatomic, strong) Nsmutabledata *Resultdata; - @end -  the @implementationViewcontroller -  - #pragmaMark---------------------- - #pragmaMark Lazy Loading +-(Nsmutabledata *) Resultdata - { +     if(_resultdata = =Nil) { A_resultdata =[Nsmutabledata data]; at     } -     return_resultdata; - } - #pragmaMark---------------------- - #pragmaMark Events --(void) Touchesbegan: (Nsset<uitouch *> *) touches withevent: (Uievent *)Event in { -[SelfDelegate]; to } +  - /* the Request: Request Header (nsurlrequest default contains) + Request body (get not) * Response: Response header (real type--->nshttpurlresponse) + response body (data to parse) $  */Panax Notoginseng #pragmaMark---------------------- - #pragmaMark Methods the-(void) Sync + { A     /* the GET:http://120.25.226.186: 32812/login?username=123&pwd=456&type=json + protocol + host address + interface name +?+ parameter 1& parameter 2& parameter 3 - Post:http://120.25.226.186: 32812/login $ protocol + host address + interface name $      */ -     //GET, no request body -     //1. Determine the request path theNsurl *url = [Nsurl urlwithstring:@"Http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"]; -     Wuyi     //2. Create a Request object the     //The request header does not need to be set (the default request header) -     //Request Method---> Default to get WuNsurlrequest *request =[[Nsurlrequest Alloc]initwithurl:url]; -      About     //3. Sending the request $     //Real type: Nshttpurlresponse -Nshttpurlresponse *response =Nil; -     /* - first parameter: Request Object A Second Parameter: response header information + Third parameter: Error message the return value: Response Body -      */ $     //the method is blocked, that is, if the method is not finished, the code behind will not be executed theNSData *data = [Nsurlconnection sendsynchronousrequest:request returningresponse:&response Error:nil]; the      the     //4. Parsing Data---> Strings the     //nsutf8stringencoding -NSLog (@"%@", [[NSString Alloc]initwithdata:data encoding:nsutf8stringencoding]); in      theNSLog (@"%zd", Response.statuscode); the } About  the-(void) Async the { the     //1. Determine the request path +Nsurl *url = [Nsurl urlwithstring:@"Http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"]; -      the     //2. Create a Request objectBayi     //The request header does not need to be set (the default request header) theNsurlrequest *request =[[Nsurlrequest Alloc]initwithurl:url]; the      -     //3. Sending an asynchronous request -     /* the first parameter: Request Object the second parameter: queue determines the calling thread of the code block Completionhandler the third parameter: Completionhandler callback when the request completes (Success | failed) the Response: Response header - Data: Response body the connectionerror: Error message the      */ the[Nsurlconnection sendasynchronousrequest:request queue:[[nsoperationqueue Alloc]init] completionHandler:^ ( Nsurlresponse * _nullable response, NSData * _nullable data, Nserror *_nullable Connectionerror) {94          the         the         //4. Parsing Data theNSLog (@"%@", [[NSString Alloc]initwithdata:data encoding:nsutf8stringencoding]);98          AboutNshttpurlresponse *res = (Nshttpurlresponse *) response; -NSLog (@"%zd", Res.statuscode);101NSLog (@"%@", [Nsthread CurrentThread]);102     }];103 }104  the-(void)Delegate106 {107     //1. Determine the request path108Nsurl *url = [Nsurl urlwithstring:@"Http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"];109      the     //2. Create a Request object111Nsurlrequest *request =[Nsurlrequest Requestwithurl:url]; the     113     //3. Set up the agent to send the request the     //3.1 the     //[Nsurlconnection connectionwithrequest:request delegate:self]; the     117     //3.2118     //[[Nsurlconnection alloc]initwithrequest:request delegate:self];119      -     //3.3 Set the agent, the time to send the request to check the value of startimmediately121     //(startimmediately = = YES will send | startimmediately = = NO to call the Start method)122nsurlconnection * connect = [[Nsurlconnection alloc]initwithrequest:requestDelegate: Self startimmediately:no];123     124     //Call Start Method the [connect start];126     127 //[connect cancel];//Cancel - }129  the #pragmaMark----------------------131 #pragmaMark Nsurlconnectiondatadelegate the //1. Call when a server response is received133-(void) Connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) Response134 {135NSLog (@"%s", __func__);136 }137 138 //2. Call when the server returns data, call multiple times139-(void) Connection: (Nsurlconnection *) connection didreceivedata: (NSData *) Data $ {141NSLog (@"%s", __func__);142     143     //Stitching Data144 [Self.resultdata Appenddata:data];145 }146 //3. Call when the request fails147-(void) Connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) Error148 {149NSLog (@"%s", __func__); Max }151  the //4. Call at the end of the request153-(void) Connectiondidfinishloading: (Nsurlconnection *) Connection154 {155NSLog (@"%s", __func__);156     157NSLog (@"%@", [[NSString Alloc]initwithdata:self.resultdata encoding:nsutf8stringencoding]);158 }159 @end

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Nsurlconnection sending a GET request