ios - 如何在 Did DeSelect 中删除字典数组中的值？

Question

我正在用 OrderDetailsArray 填充我的 tableView。然后在 DidSelect 上，我将值添加到 reorderArray。 如何在点击 DidDeSelect 时从数组中删除值？

我的 tableView 委托(delegate)函数:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let object = orderDetailsArray.object(at: (indexPath as NSIndexPath).row) as! NSDictionary

    let storeID = UserDefaults.standard.value(forKey: DefaultsKey.storeID.rawValue) as! Int
    let barcode = object["barcode"] as! String
    let mrp = object["mrp"] as! String
    let productDiscount = object["product_discount"] as! String

    reorderDictionary.setObject((storeID), forKey: "store_id" as NSCopying)
    reorderDictionary.setObject((barcode), forKey: "barcode" as NSCopying)
    reorderDictionary.setObject((mrp), forKey: "mrp" as NSCopying)
    reorderDictionary.setObject((productDiscount), forKey: "product_discount" as NSCopying)

    reorderArray.add(reorderDictionary)
    let cell = tableView.cellForRow(at: indexPath) as! OrderHistoryProductDetailsTableViewCell
    cell.contentView.backgroundColor = UIColor.red
    print(reorderArray)
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath) as! OrderHistoryProductDetailsTableViewCell
    let object = reorderArray.object(at: (indexPath as NSIndexPath).row) as! NSDictionary
    reorderArray.remove(object)
    cell.contentView.backgroundColor = UIColor.clear
    print(reorderArray)
}

reorderArray 是 NSMutableArray()

Answer 1

你不应该在 Swift 中使用诸如 NSMutableArray 或 NSDictionary 之类的基础类，除非你有充分的理由，但简单的答案是你可以使用 remove 从 NSMutableArray 中删除对象的实例，您可以轻松地从索引路径中找到相关对象:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath) as! OrderHistoryProductDetailsTableViewCell
    let object = orderDetailsArray.object(at: (indexPath as NSIndexPath).row) as! NSDictionary
    reorderArray.add(object)
    cell.contentView.backgroundColor = UIColor.red
    print(reorderArray)
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    let object = orderDetailsArray.object(at: (indexPath as NSIndexPath).row) as! NSDictionary
    reorderArray.remove(object)
    let cell = tableView.cellForRow(at: indexPath) as! OrderHistoryProductDetailsTableViewCell
    cell.contentView.backgroundColor = UIColor.clear
    print(reorderArray)
}