Question

我使用NSDictionary创建了一个json。这是我的代码。

NSArray *propertyNames1 = [NSArray arrayWithObjects:@"Name", @"Lat", @"Lng", nil];

NSArray *propertyValues1 = [NSArray arrayWithObjects:@"testName1", @"32.345453", @"23.5456346", nil];


NSDictionary *properties1 = [NSDictionary dictionaryWithObjects:propertyValues1 forKeys:propertyNames1];

我想将它发送到网址。因为我使用了这段代码。

NSString *urlString=[NSString stringWithFormat:@"http:example.com];
NSMutableURLRequest *mrequest = [[NSMutableURLRequest alloc] init];
[mrequest setURL:[NSURL URLWithString:urlString]];
[mrequest setHTTPMethod:@"PUT"];
[mrequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

 NSString *post =[NSString stringWithFormat:@"%@",properties1];
 NSData *body = [NSData dataWithBytes: [post1 UTF8String] length:[post1 length]];

[mrequest setHTTPBody:body];

NSURLConnection *connection=[[NSURLConnection alloc]initWithRequest:mrequest delegate:self];

if(connection)
{
    webdata = [[NSMutableData alloc] init];
}

但是它会以

的形式发布到网址中

{ “{\ n Lat”：“\”32.345453 \“; \ n Lng = \”23.5456346 \“; \ n Name = testName1; \ n}” }

我需要输出

{
  {
    "Lat": "32.345453"
    "Lng": "23.5456346"
    "Name": "testName1"
  }
}

请帮帮我......

Answer 1

use the following 

jsonDictionary = [[NSMutableDictionary alloc] init];
[jsonDictionary setObject:@value1" forKey:@"Lat"];
[jsonDictionary setObject:@"value2" forKey:@"Lng"];
[jsonDictionary setObject:@"value3"   forKey:@"Name"];


//Set the URL YOU WILL PROVIDE
NSURL *url = [NSURL URLWithString:@"http://....."];


NSData *jsonData=[NSJSONSerialization dataWithJSONObject:jsonDictionary
                                                 options:NSJSONWritingPrettyPrinted 
                                                   error:nil];


ASIFormDataRequest *request= [[ASIFormDataRequest alloc] initWithURL:url :@"POST"];
[request setData:jsonData forKey:nil];
[request setDelegate:self];
[request startAsynchronous];

祝你好运：）

Answer 2

//构建一个info对象并转换为json

    NSDictionary *properties1 = [NSDictionary dictionaryWithObjects:propertyValues1 forKeys:propertyNames1];

    //convert object to data
    NSData* jsonData = [NSJSONSerialization dataWithJSONObject: properties1 options:kNilOptions error:&error];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:@"http://example.com"]];];
    [request setHTTPMethod:@"PUT"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setHTTPBody:jsonData];

    // print json:
    NSLog(@"JSON summary: %@", [[NSString alloc] initWithData:jsonData
                                                     encoding:NSUTF8StringEncoding]);
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

    if(connection)
    {
      webdata = [[NSMutableData alloc] init];
    }

Answer 3

要将字典转换为JSON，您不应使用以下行：

NSString *post =[NSString stringWithFormat:@"%@",properties1];

而不是你应该使用下面的行：

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:properties1
                                                       options:0
                                                         error:&error];

Answer 4

使用SBJSON https://github.com/dekkers/sbjson

import JSON.h

NSString *post =[NSString stringWithFormat:@"%@",[properties1 JSONRepresentation]];

想要创建一个json并将其发送到网址

4 个答案: