POST JSON (Dictionary custom class converted to JSON upload)

The main method of the POST JSON is set Content-type to Application/json the remainder is to convert the class to JSON format binary number

-(void) Postjson: (NSData *) Data {

1. Url

Nsurl *url = [Nsurl urlwithstring:@ "http://127.0.0.1/postjson.php"];

2. Request

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2.1 HttpMethod

Request. HttpMethod = @ "POST";

2.2 Set Content-type, some servers when receiving data, will do the data type of verification

[Request setvalue:@ "Application/json" forhttpheaderfield:@ "Content-type"];

2.3 Setting up data

Request. Httpbody = data;

3. Connection

[Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) {

NSLog (@ "%@", [[NSString alloc] Initwithdata:data encoding:nsutf8stringencoding]);

}];

}

An array of POST dictionaries or a separate dictionary

-(void) Postdict {

Nsdictionary *dict1 = @{@ "ProductId": @123, @ "ProductName": @ "Mac Pro"};

Nsdictionary *dict2 = @{@ "ProductId": @001, @ "ProductName": @ "IPhone 7"};

Nsarray *array = @[dict1, dict2];

serialization, before the data is sent to the server, the dictionary/array---binary data

Data parsing-deserialization, converting binary data returned by the server into a dictionary or model

NSData *data = [nsjsonserialization datawithjsonobject:array options:0 error:null];

[Self postjson:data];

}

KVC the properties of a class into a dictionary, and then serializes the dictionary

-(void) Postperson {

Parameters: Converting an array of incoming objects into a dictionary

ID obj = [self.person dictionarywithvaluesforkeys:@[@ "name", @ "age", @ "title", @ "height"]];

A top-level node, which is an array or dictionary

if (![ Nsjsonserialization Isvalidjsonobject:obj]) {

NSLog (@ "Invalid data format");

Return

}

NSData *data = [nsjsonserialization datawithjsonobject:obj options:0 error:null];

[Self postjson:data];

}

POST JSON (Dictionary custom class converted to JSON upload)