如何在Swift3中使用分隔符連接NSMutableArray的對象

Question

我有一個NSMutableArray聲明為：

var operatingDays = NSMutableArray()

接下來，我將對象附加到數組中，如下所示：

for operatingDays in forecast.operatingDays! {
              print(operatingDays.days)
              print(operatingDays.times)
              self.operatingDays.add(operatingDays.days)
            }

因此，營業日數組現在包含數組。

現在，我想將每個數組轉換為用空格分隔的字符串，並將其顯示給UITableViewCell。 為此，我正在像這樣在cellForRowAtIndexPath使用代碼：

cell.operationalDays.text = (operatingDays[indexPath.row] as AnyObject).joined(separator: " ")

但是它顯示了錯誤：

Answer 1

正如我在第一條評論中所述，將您的operatingDays[indexPath.row]強制轉換為[String] ，請嘗試一下

if let arrayOfStrings = operatingDays[indexPath.row] as? [String]
{
  cell.operationalDays.text = arrayOfStrings.joined(separator: " ")
}

希望這可以幫助

Answer 2

解決方案如下：

var operatingDays = [Any]()
cell.operationalDays.text = (operatingDays[indexPath.row] as? [String])?.joined(separator: " ")

要么

if let data = operatingDays[indexPath.row] as? [String] {
     cell.operationalDays.text = data.joined(separator: " ")
}

Answer 3

嘗試按以下方式聯合數組：

let tempArr = operatingDays[indexPath.row] as! NSArray
cell.operationalDays.text = tempArr.componentsJoined(by: " ")

Answer 4

將AnyObject強制轉換為Array以使用聯合函數。

if let isArray = operatingDays[indexPath.row] as? [String] {
    //Now you can able to use joined function
    cell.operationalDays.text = isArray.joined(separator: " ")
}