how to create json object in ios swift - ios

Question

I have 3 arrays when I insert data inside table than that data also add in the array (key, value pair).
var person = ["ABC","XYZ","PQR"]
var email = ["abc#yahoo.com","xyz#yahoo.com","pqr#yahoo.com"]
var mobile = ["1234567890","1234567890","1234567890"]
My problem is how to create JSON object and data store key value pair.
I want this
{
"blogs": [
{
"person": "ABC",
"email": "abc#yahoo.com",
"contact": "1234567890"
},
{
"person": "XYZ",
"email": "xyz#yahoo.com",
"contact": "1234567890"
},
{
"person": "PQR",
"email": "pqr#yahoo.com",
"contact": "1234567890"
}
]
}
so that data passes to url()
In the action button that adds data in array and table
#IBAction func meeting_info(_ sender: Any) {
var PersonName = person_name.text
var Email = email_id.text
var MobileNo = mobile_no.text
if (person_name.text?.isEmpty)! || (email_id.text?.isEmpty)! || (mobile_no.text?.isEmpty)! {
displayMyAlertMessage(userMessage: "please check field empty or not");
}
else{
person.append(person_name.text!)
email.append(email_id.text!)
mobile.append(mobile_no.text!)
meetingTableView.reloadData()
}
}
I want to generate JSON array from person, email and contact in key value pairs

Answer 1

to answer your question.
var person = ["ABC","XYZ","PQR"]
var email = ["abc#yahoo.com","xyz#yahoo.com","pqr#yahoo.com"]
var mobile = ["1234567890","1234567890","1234567890"]
var paramCollection = [Any]()
var index = 0
for personData in person {
var dataCollection = [String:Any]()
dataCollection["person"] = personData
dataCollection["email"] = email[index]
dataCollection["contact"] = mobile[index]
paramCollection.append(dataCollection)
index += 1
}
let finalParameter = ["blogs":paramCollection]
}
//This will do the trick but to make it more robust you should rethink your design
// maybe use struct to store a persons data
struct Blog {
var person: String
var email: String
var mobile: String
init(name:String, email:String, phone:String) {
self.person = name
self.email = email
self.mobile = phone
}
}
//and instead of having three arrays holding three different property, you can have one array of
var blogArray = [Blog]()
//You understand where I'm going with this

Answer 2

This is not a great design by choice to have multiple arrays relating to the data of same Entity.
Ideally create an Entity Model called Blog with fields like personName, email, mobileNo like below -
struct Blog {
var personName: String?
var email: String?
var mobileNo: String?
}
And then in your code have an array of this to save the data then you can directly convert it into Json using the link
Convert Custom Structs to Json

Answer 3

Try this:
let jsonObject: [String: Any]?
let array: [[String: Any]] = [[:]]
for i in 0..person.count {
let dict = ["person": person[i],
"email": email[i],
"contact": mobile[i]]
array.append(dict)
}
jsonObject = ["blogs": array]
let validateJson = JSONSerialization.isValidJSONObject(jsonObject)
if validateJson {
//Go Ahead
}

Answer 4

let dictionary = ["key1": "value1", "key2": "value2"]
let jsonData = try? JSONSerialization.data(withJSONObject: dictionary, options: .prettyPrinted)
// Verifying it worked:
let parsedObject = try! JSONSerialization.jsonObject(with: jsonData!, options: .allowFragments)