Swift - UITableView didSelectRowAtIndexPath& didDeselectRowAtIndexPath Add&删除indexPath ID [英] Swift - UITableView didSelectRowAtIndexPath & didDeselectRowAtIndexPath Add & Remove indexPath IDs

问题描述

这是代码：

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    let selectedItem = items.objectAtIndex(indexPath.row) as String
    let itemId = selectedItem.componentsSeparatedByString("$%^")
    //itemId[1] - Item Id
}

func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
    let selectedItem = items.objectAtIndex(indexPath.row) as String
    let itemId = selectedItem.componentsSeparatedByString("$%^")
    //itemId[1] - Item Id
}

如何添加项目ID在数组或字符串或其他东西......？例如，当您选择行0,1,4,5时，您在数组或字符串中添加了不同的项目ID，然后当我想取消选择它们时，如何取消选择取消选择的indexPath.row中的确切项目ID并查找它在数组或字符串或其他东西......并删除它？
对不起我的英语，如果你有问题在评论中提问我会解释我是否可以

How to add Item Id "in Array or in String or something else..."? When you select rows 0,1,4,5 for example you have different Item Ids added "in Array or in String" and then when I want to deselect them how to deselect exact Item Id from the indexPath.row that is deselected and find it "in Array or in String or something else..." and deleted it ? Sorry for my broken english if you have a questions ask in comments and I will explain if I can

推荐答案

你可以通过向表视图控制器添加 Dictionary 属性来实现这一点：

You could do this pretty simply by adding a Dictionary property to your table view controller:

class ViewController : UITableViewController {
    var selectedItems: [String: Bool] = [:]

    // ...

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        let selectedItem = items.objectAtIndex(indexPath.row) as String
        let itemId = selectedItem.componentsSeparatedByString("$%^")
        // add to self.selectedItems
        selectedItems[itemId[1]] = true
    }

    func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
        let selectedItem = items.objectAtIndex(indexPath.row) as String
        let itemId = selectedItem.componentsSeparatedByString("$%^")
        // remove from self.selectedItems
        selectedItems[itemId[1]] = nil
    }

    // can access the items as self.selectedItems.keys
    func doSomething() {
        for item in selectedItems.keys {
            println(item)
        }
    }
}

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