如何根据键对数组进行排序？

Question

I have an array which has two types of objects: Awarded and non-awarded. I simply want to sort my array so that awarded objects are placed first, and the rest are placed afterwards.

Here is the code that defines the key "awarded":

if let awarded = achievements[indexPath.row].userRelation["awarded"] as? String where awarded != "<null>" { }

Within those brackets I'd like to use my unwrapped value "awarded" to sort through the achievements and add those to the beginning, and the rest at the end.

How would I go about doing that?

Answer 1

You should experiment with sort function, it is very useful.

let sortedAchievements = achievements.sorted{ $0.userRelation["awarded"] < $1.userRelation["awarded"] }

To sort in place use this:

achievements.sort{ $0.userRelation["awarded"] < $1.userRelation["awarded"] }

I would recommend to refactor your model. It's better to use objects or structs instead of dictionaries. Also awarded should be a Bool property, not a String , right?