Get&post Login

1 #import "MJViewController.h"2 3 @interfaceMjviewcontroller ()4@property (Weak, nonatomic) Iboutlet Uitextfield *UserName;5@property (Weak, nonatomic) Iboutlet Uitextfield *userpwd;6 7@property (Weak, nonatomic) Iboutlet UILabel *Logonresult;8 9 @endTen  One @implementationMjviewcontroller A /** - all network requests, unified use asynchronous Request! -   the in future development, if you use a simple get/head request, you can use the Nsurlconnction async method - get check/post increase/put change/delete delete/head -  GET 1> url 2> nsurlrequest 3> nsurlconnction async POST 1> URL 2> nsmuta Bleurlrequest 26. HttpMethod = @ "POST"; Str from Firebug paste directly, or write 28 variable name 1 = value 1& variable Name 2 = value 2 29 30. Httpbody = [Str datausingencoding:nsutf8stringencoding]; 3> nsurlconnction Async +   -  */ the-(ibaction) Userlogon * { $ [self postlogon];Panax Notoginseng } -  the #pragmaMark-post Login +- (void) Postlogon A { the     //1. URL +Nsurl *url = [Nsurl urlwithstring:@"http://localhost/login.php"]; -      $     //2. Request (can change the request) $Nsmutableurlrequest *request =[Nsmutableurlrequest Requestwithurl:url]; -     // ? POST -     //The default is a GET request theRequest. HttpMethod =@"POST"; -     //? Data BodyWuyiNSString *str = [NSString stringWithFormat:@"username=%@&password=%@", Self.userName.text, Self.userPwd.text]; the     //converting a string into data -Request. Httpbody =[str datausingencoding:nsutf8stringencoding]; Wu      -     //3. Connect, asynchronous About[Nsurlconnection sendasynchronousrequest:request Queue:[[nsoperationqueue alloc] init] completionhandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) { $          -         if(Connectionerror = =Nil) { -             //execute after the network request is over! -             //convert data into a string ANSString *str =[[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]; +              the             //num = 2 -NSLog (@"%@ %@", str, [Nsthread CurrentThread]); $              the             //Update Interface the[[Nsoperationqueue Mainqueue] addoperationwithblock:^{ theSelf.logonResult.text =str; the             }]; -         } in     }]; the      the     //num = 1 AboutNSLog (@"come here%@", [Nsthread CurrentThread]); the } the  the #pragmaMark-get Login +- (void) Getlogon - { the     //1. URLBayiNSString *urlstr = [NSString stringWithFormat:@"http://localhost/login.php?username=%@&password=%@", Self.userName.text, Self.userPwd.text]; the      theNsurl *url =[Nsurl Urlwithstring:urlstr]; -      -     //2. Request theNsurlrequest *request =[Nsurlrequest Requestwithurl:url]; the      the     //3. Connection the     //1> cannot do follow-up work until login is completed! -     //2> Login In progress, you can allow users to do something else will be better! the     //3> allows the login operation to be performed in other threads without blocking the main thread's work the     //4> Conclusion: Landing is also an asynchronous access, the middle need to block live the[Nsurlconnection sendasynchronousrequest:request Queue:[[nsoperationqueue alloc] init] completionhandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) {94          the         if(Connectionerror = =Nil) { the             //execute after the network request is over! the             //convert data into a string98NSString *str =[[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]; About              -             //num = 2101NSLog (@"%@ %@", str, [Nsthread CurrentThread]);102             103             //Update Interface104[[Nsoperationqueue Mainqueue] addoperationwithblock:^{ theSelf.logonResult.text =@"Login Complete";106             }];107         }108     }];109      the     //num = 1111NSLog (@"come here%@", [Nsthread CurrentThread]); the     113Nsurlresponse *response =Nil; the     //1. Does the &response really understand? the     //2. Error: Why is null, not nil the     //NULL is the c language = 0117     //in C, there is no danger if you point the address of the pointer to 0118     119     //Nil is OC and is an empty object sending messages without problems - //[Response MIMEType];121[Nsurlconnection sendsynchronousrequest:request returningresponse:&response Error:null];122 }123 124 @end

Get&post Login