iOS Swift-prepareForSegue-indexPathForSelectedRow

Question

我想知道是否有一種方法可以使用不同的“ indexPath”值作為segue中使用的鍵...

原因是，我有未分組和排序的JSON feed數據：

{ "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，然后編寫了自己的分組和排序代碼。 當我在TableView中顯示分組和排序的數據時，常規（行鍵）不對應JSON鍵。 這會破壞主數據/明細數據。 基本上，在表視圖中，給定的主記錄我得到了錯誤的詳細信息。 例：

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

印刷品：

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}

參見“路徑= ...” ???

問題：是否可以將我的JSON“ objectId”用作“ indexPathForSelectedRow（）?. row”值，而不是“ prepareForSegue”中的tableViews部分和行值？ （有口，我知道...）

這是分組和排序：

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指示表視圖中的位置。 如果使用數組在UITableViewDataSource構建表，則可以僅使用indexPathForSelectedRow()?.row和/或indexPathForSelectedRow()?.section作為此數組的索引。

編輯：根據您的評論，您將需要撤銷用於獲取nameSection的步驟。

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

因此，給定單元格的indexPath ，您可以使用前兩行檢索key和nameSection 。 給定這些值，您將需要一個函數，該函數可以根據原始結果數組的key / nameSection（反向getData_VendorsByCategory和/或getData_VendorsByName ）找到一個對象。 我建議在進行分組和排序時創建一個查找數組或字典。

例如，如果添加了以下內容：

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

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

您可以像這樣檢索供應商對象：

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