中環集合視圖訪問對於斯威夫特

Question

我有這個數組，我創建：let yourShares = ["90%","40%", "23%","15%","10%"]然後接取此：

for yourShare in yourShares { 
     dataSource[0].yourShareTitle = "90%" 
     dataSource[1].yourShareTitle = "40%" 
     dataSource[2].yourShareTitle = "23%" 
     dataSource[3].yourShareTitle = "10%" 
    } 

然後訪問此我把這個代碼的擴展集合視圖

let yourShare = model.dataSource?[indexPath.row] cell.yourShareLabel.text = "Your Share \(yourShare!.yourShareTitle)" cell.titleLabel?.font = UIFont.systemFont(ofSize: 1)

問題是，當我運行它只是打印可選。爲什麼，我該如何解決這個問題？ 〜感謝

Answer 1

你需要解開它

if let yourShare = model.dataSource?[indexPath.row]?.yourShareTitle as? String { 
     cell.yourShareLabel.text = "Your Share \(yourShare)" 
     cell.titleLabel?.font = UIFont.systemFont(ofSize: 1) 
}