Swift 3 sort jsonArray

Question

請問能否告訴我如何根據「currentPoints」值對「bonusCardsArray」中的多個「BonusCard」數組進行排序（降序，升序）。

//Array to sort according to "currentPoints" 
var bonusCardsArray = [BonusCard]() 

//basis class 
class BonusCard { 

    var companyName    : String 
    var bonusCardDescription : String 
    var currentPoints   : Int 
    var bonusCardType   : Int 


    init(companyName: String, bonusCardDescription: String,  
    currentPoints: Int, bonusCardType: Int) { 

     self.companyName = companyName 
     self.bonusCardDescription = bonusCardDescription 
     self.currentPoints = currentPoints 
     self.bonusCardType = bonusCardType 
    } 
} 

Answer 1

排序到位（升序w.r.t.到currentPoints屬性），使用的sort(by:) method

bonusCardsArray.sort { $0.currentPoints < $1.currentPoints } 

或者，創建一個新的陣列;原來的排序版本，利用sorted(by:) method

let sortedfBonusCardsArray = bonusCardsArray 
    .sorted { $0.currentPoints < $1.currentPoints } 

Answer 2

你應該寫下面的代碼。

• 降序

  bonusCardsArray.sorted（{$ 0 currentPoints> $ 1。currentPoints}）

• 爲升序

  bonusCardsArray.sorted（{$ 0 currentPoints < $ 1 currentPoints }）