无法调用' indexOf'参数类型为'(ChecklistItem)'的参数列表 [英] Cannot invoke 'indexOf' with an argument list of type '(ChecklistItem)'

问题描述

当我编写代码以使用indexOf从数组中查找项目时，它向我显示了上述错误.这是我的代码:-

When I am writing code for finding an item from the array with the use of indexOf it shows me the above stated error. Here is my code:-

func addItemViewController(controller: AddItemViewController, didFinishEditingItem item: ChecklistItem)
{
    if let index = items.indexOf(item)
    {
        let indexPath = NSIndexPath(forRow: index, inSection: 0)

        if let cell = tableView.cellForRowAtIndexPath(indexPath)
        {
            configureTextForCell(cell, withChecklistItem: item)
        }
    }

推荐答案

为了使用 indexOf ， ChecklistItem 必须采用

In order to use indexOf the ChecklistItem must adopt Equatable protocol. Only by adopting this protocol the list can compare an item with other items to find the desired index

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