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i dont want to work with hardcoded datatypes(create struct...). because in json (each object has array) can be added new objects, (from database). and i want to read that objects from json. i want to rewrite the code to SwiftUI. i did that in swift correctly with this code:
example json:
{
"Burgres": [
{
"food_name": "Hovadzi Burger",
"food_description": "Najlepsi burger na svete, uhorka, cibula, majoneza, masko a tak dalej",
"alergens": "1, 3, 6"
},
],
}
swift code :
func makeGetCall() {
guard let myURL = URL(string: "xxxxxx") else {
print("Error: \(String(describing: link)) doesn't seem to be a valid URL")
return
}
do {
let content = try String(contentsOf: myURL, encoding: .ascii)
let test = content.data(using: .utf8)!
if let dict = try JSONSerialization.jsonObject(with: test) as? [String:[Any]] {
for k in dict{
print(k.key)
for i in k.value{
let tmp_i = i as! NSDictionary
for (k,v) in tmp_i
{
print("\(k):\(v)")
}
print("\n")
}
print("---------------------------\n")
}
}
}
catch {
print(error)
}
}
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can you try this , is this what you want ? no error so far , gives me Burgres in list
let dataFood = """
{
"Burgres": [
{
"food_name": "Hovadzi Burger",
"food_description": "Najlepsi burger na svete, uhorka, cibula, majoneza, masko a tak dalej",
"alergens": "1, 3, 6"
},
],
}
"""
.data(using: .utf8)!
struct ContentView: View {
private var test: [String: [Any]] = try! JSONSerialization.jsonObject(with: dataFood) as! [String:[Any]]
var body: some View {
List {
ForEach(test.keys.sorted(), id:\.self) { index in
Text(index)
}
}
}
}
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@AmitShrivastava
yes but what if i want to access food_name(variable and value and print it) in every object, in dictionary
for example:
food_name : Hovadzi Burger
update :
let dataFood = """
{
"Burgres": [
{
"food_name": "Hovadzi Burger",
"food_description": "Najlepsi burger na svete, uhorka, cibula, majoneza, masko a tak dalej",
"alergens": "1, 3, 6"
},
],
}
"""
.data(using: .utf8)!
struct Food: Codable, Hashable {
let food_name : String
let food_description : String
let alergens : String
}
struct ContentView: View {
//private var test: [String: [Any]] = try! JSONSerialization.jsonObject(with: dataFood) as! [String:[Food]]
private var food = try! JSONDecoder().decode([Food].self, from: dataFood)
var body: some View {
List {
ForEach(food, id: \.self) { index in
Text("\(index.food_name)")
}
}
}
}```
but i got this 
https://imgur.com/9B3nas6 if wont show
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@localhost - the error can be resolved by using
private var food = try? JSONDecoder().decode([Food].self, from: json)
ForEach(food ?? [], id: \.self)
But its not showing any thing on list, i tried a few things myself, but its not giving the results
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@AmitShrivastava
Im trying something like this: but i get Generic struct 'ForEach' requires that '[Welcome : [Food]]?' conform to 'RandomAccessCollection
let content = try! String(contentsOf: myURL!, encoding: .ascii)
let test = content.data(using: .utf8)!
let dict = try! JSONSerialization.jsonObject(with: test) as? [Welcome:[Food]]
struct Food: Codable, Hashable {
let name, Description, alergens: String
enum CodingKeys: String, CodingKey {
case name
case Description = "description"
case alergens
}
}
struct Welcome: Codable, Hashable {
let food_type: [Food]
}
struct ContentView: View {
private var test = dict
var body: some View {
Text("Text")
ForEach(test){ key in
Text(key)
}
}
}
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In SwiftUI, ForEach will require that you give it a RandomAccessCollection. However, there are ways to iterate through a dictionary using ForEach if you know what all of the keys are, and can make a RandomAccessCollection out of them.
struct ContentView: View {
let dictionary: [String: Int] = ["Hello": 1, "Hi": 2, "Hey": 3, "Wassup?": 4]
let dictionaryKeys = ["Hello", "Hi", "Hey", "Wassup?"]
var body: some View {
List {
ForEach(dictionaryKeys, id: \.self) { greeting in
if let value = dictionary[greeting] {
Text("\(value)")
}
}
}
}
}
I don't know how helpful this will be in your case. But maybe it will be useful.
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You don't even need to know the keys beforehand:
ForEach(Array(dictionary.keys), id: \.self) { greeting in
Text("\(dictionary[greeting]!)")
}
And, bonus, you don't need the check for a nil value since we know the key exists in the Dictionary.
Or, if you object to the force unwrap on principle or from an abundance of caution, you can enumerate the elements of the Dictionary:
ForEach(Array(dictionary.enumerated()), id: \.0) { (_, elem) in
//elem is a (key, value) pair
Text("\(elem.value)")
}
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Lol... I was trying to figure out how to use dictionary.keys instead, but couldn't think of how to make it into an array rather than a Set.
Easy, Array(dictionary.keys)!
Thanks. I don't know why I couldn't think of that.
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