How to Assign Value of Type Double to Type String?

Question

Created Dec ’17

Replies 3

Boosts 0

Views 6.5k

Participants 4

Hey guys, I'm having a problem when attempting to display data from an API JSON feed in a tableview. While some of my functions are strings, others are double or int. Therefore, I get the error "Cannot assign value of type 'Double?' to type 'String?'" when attempting to display data in a double format. Also, it should be noted that this JSON feed has nested elements. How can I go about fixing this issue. For reference, the needed parts of my code are below.

JSON Struct

struct PlayerStatsParent:Decodable{
    let rankings: [PlayerStats]
}

struct PlayerStats:Decodable {
    let personaname: String?
    let score: Double?
    let solo_competitive_rank: Int?
    let avatar: String?
}

Tableview Cell Function

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "rankCell") as? RankTableViewCell else { return UITableViewCell() }
        cell.nameLabel.text = rank[indexPath.row].score
}

Boost

Answer 1

iTen OP

Dec ’17

Optional binding on "rank[indexPath.row].score" then create a string from the double value

if let value = rank[indexPath.row].score {
     cell.nameLabel.text = String(value)
} else {
     cell.nameLablel.text = "Free"
}

0

Answer 2

DTS Engineer OP

Apple

Dec ’17

What iTen said plus…

If you’re displaying numbers to the user, you should use

NumberFormatter

to get a locale-aware string. For example:

let value: Double = 1234
let valueStr = NumberFormatter.localizedString(from: NSNumber(value: value), number: .decimal)
print(valueStr)     // prints "1,234" on /my/ system

On other user’s systems this might print:

1.234 (German as used in German)
1 234 (French as used in France)
[fancy Arabic example omitted because DevForums won’t let me post those characters )-: ]

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Apple Developer Relations, Developer Technical Support, Core OS/Hardware

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0

Answer 3

LuKe94 OP

Dec ’17

OFFTOPIC
Hi eskimo,
I added a thread on the forum, could you please help me? Tried to pm you but there is no such function on the site.

Thank you

0