Ios 创建自定义JSON字符串

我想使用JSON字符串向服务器发送数据。下面是我想要使用的JSON对象的格式。请帮助我创建这种类型的结构

{ '__metadata': { 'type': 'SP.Data.MetrolinkVerificationListItem' },
                    'Company': 'SOCALGAS-15',
                    'Date': '08/31/2016',
                    'Employee_x0020_ID': '545',
                    'Month': 'JULY',
                    'Name_x0020_of_x0020_Transit': 'METROLINK',
                    'Total_x0020_Amount_x0020_Spent': '444',
                    'Year': '2015'}

---

您可以使用NSString的

stringWithFormat

：

NSString *str = [NSString stringWithFormat:@"{ '__metadata': { 'type': '%@' },'Company': '%@','Date': '%@','Employee_x0020_ID': '%@','Month': '%@','Name_x0020_of_x0020_Transit': '%@','Total_x0020_Amount_x0020_Spent': '%@','Year': '%@'}",typeStr,companyStr,dateStr,employeeIDStr,monthStr,nameTransitStr,amountSpentStr,yearStr];

---

如果要将字符串替换为NSInteger，请将%@替换为%ld

如果要根据请求将

NSDictionary

作为参数传递，请使用此

NSDictionary *type = @{ @"type" : @"SP.Data.MetrolinkVerification‌​ListItem"
                       };

NSDictionary *final = @{@"metadata" : type, @"pas" : @"1234",@"name" : @"hai"
                       };

NSLog(@"json string %@",final);

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:final
                                                   options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
                                                     error:&error];

if (! jsonData) {
    NSLog(@"Got an error: %@", error);
} else {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

     NSLog(@"final %@",jsonString);
}

输出

---

如果要根据请求将

NSDictionary

作为参数传递给

JSON字符串

，请使用

NSDictionary *type = @{ @"type" : @"SP.Data.MetrolinkVerification‌​ListItem"
                       };

NSDictionary *final = @{@"metadata" : type, @"pas" : @"1234",@"name" : @"hai"
                       };

NSLog(@"json string %@",final);

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:final
                                                   options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
                                                     error:&error];

if (! jsonData) {
    NSLog(@"Got an error: %@", error);
} else {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];

     NSLog(@"final %@",jsonString);
}

输出

---

您能否显示您尝试过的代码以及您面临的问题DNSDictionary*dict1=[[NSDictionary alloc]initWithObjects和Keys:@“SP.Data.MetrolinkVerificationListItem”，“type”，nil]；NSDictionary*dict2=[[NSDictionary alloc]initWithObjectsAndKeys:@“hai”、@“name”、@“1234”、@“pas”、nil]；NSDictionary*myDictionary=[[NSDictionary alloc]initWithObjectsAndKeys:dict2，@“设备”，dict1，@“元数据”，nil]；NSString*str=[myDictionary bv_jsonStringWithPrettyPrint:NO]；NSLog（@“json字符串%@”，str）；