iOS Swift - prepareForSegue - indexPathForSelectedRow

Question

我想知道是否有办法使用不同的“indexPath”值作为 segue 中使用的键...

原因是，我有未分组和排序的 JSON 提要数据:

{ "results":
[
 {
 "BusCat01": "Household",
 "CompanyDescription": "Household",
 "CompanyName": "Bed \u0026 Bath Store",
 "objectId": "Vq3lmoE0PA",
 },
 {
 "BusCat01": "Food",
 "CompanyDescription": "Hot Dogs",
 "CompanyName": "Wiener Schnitzl",
 "objectId": "xcCeuVoexD",
 },
 {
 "BusCat01": "Clothing",
 "CompanyDescription": "Clothing",
 "CompanyName": "Banana Republic",
 "objectId": "FGV8QuHmiw",
 }
]
}

我使用了 JSON，然后编写了自己的分组和排序代码。当我在 TableView 中显示分组和排序数据时，序号(行键)不对应 JSON 键。这会损坏主/详细数据。基本上，我在 TableView 中得到了给定主记录的错误详细信息。示例:

println("cellForRowAtIndexPath indexPath: \(indexPath)")

打印:

cellForRowAtIndexPath indexPath: {length = 2, path = 0 - 0}

cellForRowAtIndexPath indexPath: {length = 2, path = 0 - 1}

cellForRowAtIndexPath indexPath: {length = 2, path = 0 - 2}

cellForRowAtIndexPath indexPath: {length = 2, path = 0 - 3}

cellForRowAtIndexPath indexPath: {length = 2, path = 1 - 0}

cellForRowAtIndexPath indexPath: {length = 2, path = 1 - 1}

cellForRowAtIndexPath indexPath: {length = 2, path = 2 - 0}

cellForRowAtIndexPath indexPath: {length = 2, path = 2 - 1}

cellForRowAtIndexPath indexPath: {length = 2, path = 3 - 0}

看到“path = ...”？？？

问题:是否可以使用我的 JSON“objectId”作为“indexPathForSelectedRow()?.row”值，而不是“prepareForSegue”中的 tableViews 部分和行值？ (满口，我知道...)

这是分组和排序:

func getData_VendorsByCategory() {
    clearData()
    if vendors.count > 0 {
        for object in vendors {
            let key = object.busCat01
            if vendsInCatDict.indexForKey(key!) != nil { // Add item to a pre-existing List that contains pre-existing Items
                vendsInCatDict[key!]?.append(object.companyName!)
                vendsArr.append(object.companyName!)
                vendsArr = sorted(vendsArr, descending)
            } else { // Create an array and add item to it
                vendsInCatDict[key!] = [object.companyName!]
                catsArr.append(key!)
                catsArr = sorted(catsArr, descending)
                vendsArr.append(object.companyName!)
                vendsArr = sorted(vendsArr, descending)
            }
        }
    }
}

func getData_VendorsByName() {
    clearData()
    if vendors.count > 0 {
        for object in vendors {
            let key = object.companyName as String?
            var index = advance(key!.startIndex, 1)
            var firstCharacter = key!.substringToIndex(index)

            if vendsInCatDict.indexForKey(firstCharacter) != nil { // Add item to a pre-existing List that contains pre-existing Items
                vendsInCatDict[firstCharacter]?.append(object.companyName!)
                vendsArr.append(object.companyName!)
                vendsArr = sorted(vendsArr, descending)
            } else { // Create an array and add item to it
                vendsInCatDict[firstCharacter] = [object.companyName!]
                catsArr.append(firstCharacter)
                catsArr = sorted(catsArr, descending)
                vendsArr.append(object.companyName!)
                vendsArr = sorted(vendsArr, descending)
            }
        }
    }
}

Answer 1

indexPath 指示 TableView 中的位置。如果您使用数组在 UITableViewDataSource 中构建表格，则只需使用 indexPathForSelectedRow()?.row 和/或 indexPathForSelectedRow()?.section 作为这个数组的索引。

编辑:根据您的评论，您需要反转用于获取 nameSection 的步骤。

    let key = catsArr[indexPath.section]
    let nameSection = vendsInCatDict[key]!
    cell.textLabel?.text = nameSection[indexPath.row]
    return cell

因此，给定单元格的 indexPath，您可以使用前两行检索 key 和 nameSection。给定这些值，您将需要一个函数，该函数可以根据对象的键/名称部分在原始结果数组中找到对象(反向 getData_VendorsByCategory 和/或 getData_VendorsByName)。我建议在进行分组和排序时创建查找数组或字典。

例如，如果您添加了如下内容:

// Top of class
var vendorMap : [String:AnyObject] = []

// In group/search
for object in vendors {
    let key = object.companyName as String?
    vendorMap[key!] = object

您可以像这样检索供应商对象:

let key = catsArr[indexPath.section]
let nameSection = vendsInCatDict[key]!
let vendor = vendorMap[nameSection[indexPath.row]]