iOS Development Network-send JSON data to server and multivalued parameters

iOS Development Network-send JSON data to server and multivalued parameters

First, send JSON data to the server

Steps to send JSON data to the server:

(1) Be sure to use the POST request

(2) Set the request header

(3) Set the JSON data as the request body

code example:

#import"YYViewController.h"@interface Yyviewcontroller () @end @implementation Yyviewcontroller- (void) viewdidload{[Super Viewdidload];}- (void) Touchesbegan: (Nsset *) touches withevent: (Uievent *)Event{    //1. Create a requestNsurl *url = [Nsurl urlwithstring:@"Http://192.168.1.200:8080/MJServer/order"]; Nsmutableurlrequest*request =[Nsmutableurlrequest Requestwithurl:url]; Request. HttpMethod=@"POST"; //2. Set the request header[Request SetValue:@"Application/json"Forhttpheaderfield:@"Content-type"]; //3. Set the request bodyNsdictionary *json = @{                           @"order_id":@"123",                           @"user_id":@"789",                           @" Shop":@"Toll"                           }; //NSData-Nsdictionary//nsdictionary-NSDataNSData *data =[nsjsonserialization Datawithjsonobject:json options:nsjsonwritingprettyprinted Error:nil]; Request. Httpbody=data; //4. Sending the request[Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) {NSLog (@"%d", data.length); }];} @end

Two, multi-value parameters

Multivalued parameter: One parameter corresponds to multiple values.

Request parameters such as the following:

Http://192.168.1.103:8080/MJServer/weather?place= Beijing &place= Henan &place= Hunan

The place property of the server is an array. Therefore, using the same parameter does not overwrite the value of the server.

iOS Development Network-send JSON data to server and multivalued parameters