我正在嘗試從Magical Records獲取最新添加的數據

Question

我正在嘗試從Magical Records獲取最新添加的數據。 我有一個名為weighttrack的實體，它有兩個屬性 - 重量和日期，我想獲取最新添加的日期權重到我的標簽，所以怎么可能呢？

class WTStatusVC: UIViewController {
    var WeightArray = [WeightTracker]()
    var tsk: WeightTracker?
    @IBOutlet weak var currentWeightLbl: UILabel!
    @IBOutlet weak var previousWeightLbl: UILabel!

    override func viewWillAppear(_ animated: Bool) {
        super .viewWillAppear(animated)

        if let data = WeightTracker.mr_findAll(with: NSPredicate(format: "date == %@", "\(String(describing: tsk?.date))")) as? [WeightTracker] {

            WeightArray = data
            DispatchQueue.main.async {
               self.currentWeightLbl.text = self.tsk?.weight
            }
            print(data)
    }
}

Answer 1

你可以使用Filter做到這一點

self.WeightArray = self.WeightArray.filter({ (item) -> Bool in
               return item.date == tsk?.date   
       })