Swift 3 - 在投入值時總是得到零

我目前在獲取一些數據時遇到了錯誤的類型轉換。Swift 3 - 在投入值時總是得到零

這裏是我在調試控制檯中的數據：

(7, ["name": Doe, "id": 2042, "website": http://somedomaine.com/, "logo": http://somedomaine.com/img/, "category_id": 33, "category": Institutional partners, "order": 7])

我相信這是真的很明顯，但我無法弄清楚如何獲得數據，如name或id和它給我頭痛。這是我所做的：

let section = (index as NSIndexPath).section + 1 as Int 
let row = (index as NSIndexPath).row as Int 

let sectionContent = posts![ section ] as? Array<Any> 

let entry = (sectionContent?[ row ] as AnyObject)

之後，我能得到的最好的是nil！

這裏是一個小更細節：posts變量在類的，像這樣的頂部開始：

internal var posts: [ Int: AnyObject ]?

的數據分析是這樣的（原始數據來自JSON提要這是罰款）：

func parsePosts(posts: [ Dictionary< String, AnyObject > ]) -> ([ Int: AnyObject ], Int) { 

    var theCategories = [ Int : AnyObject ]() 
    var theSponsors = [ Int : AnyObject ]() 
    var theDict = [ Int : Array<Any> ]() 

    for item in posts { 

     let itemID = item[ "id" ] as! Int 
     let sponsorMeta = item[ "sponsor_meta" ] 
     let category = sponsorMeta?[ "category" ] as? String 
     let title = item[ "title" ] 
     let name = title?[ "rendered" ] as? String 

     if !(category ?? "").isEmpty { 

      let order = Int((sponsorMeta?[ "order" ] as? String)!) 
      let categoryID = sponsorMeta?[ "category_id" ] as! Int 
      let categoryOrder = sponsorMeta?[ "category_order" ] as! Int 
      let website = sponsorMeta?[ "url" ] as? String 
      let logo = sponsorMeta?[ "logo" ] as? [ String: Any ] 
      let logoSizes = logo?[ "sizes" ] as? [ String: Any ] 
      let imgUrl = logoSizes?[ "medium_large" ] as? String 

      let sponsor = [ "id": itemID, "name": (name)! as String, "logo": imgUrl! as String, "website": (website)! as String, "category": category!, "order": order!, "category_id": categoryID ] as [ String : Any ] 
      let category = [ "name": category!, "order": categoryOrder ] as [ String : Any ] 

      theCategories[ categoryID ] = category as AnyObject 
      theSponsors[ itemID ] = sponsor as AnyObject 

     } 

    } 

    for (k, value) in theCategories { 

     let categoryOrder = value[ "order" ] as! Int 
     var catDict = [ Int : [ String: AnyObject ] ]() 

     for (_, element) in theSponsors { 

      let sponsorCategoryID = element[ "category_id" ] as! Int 

      if sponsorCategoryID == k { 

       let sponsorOrder = element[ "order" ] as! Int 
       catDict[ sponsorOrder ] = element as? [ String : AnyObject ] 

      } 

     } 

     let sortedCat = catDict.sorted(by: { $0.0 < $1.0 }) 
     theDict[ categoryOrder ] = sortedCat 

    } 

    let sortedDict = theDict.sorted(by: { $0.0 < $1.0 }) 
    var finalDict = [ Int: AnyObject ]() 

    for (t, v) in sortedDict { 
     finalDict[ t ] = v as AnyObject? 
    } 

    return (finalDict, theCategories.count) 

}

我相信這只是一個很小的事情，但我已經玩了幾個小時與鑄造類型，我還沒有找到一個解決辦法。

有人有建議嗎？這將非常感激。謝謝！

來源

2016-11-24 LancelotKiin

無關你的問題，但應該沒有必要投'index'到'NSIndexPath'：http://stackoverflow.com/questions/39631905/nsindexpath-and-indexpath-in-swift-3-0。 –

首先，'parsePosts'的返回類型是一個元組，其次是你使用了太多的'Any（Object）'，其中類型顯然更具體'String'或'Int'。閱讀JSON並學習理解和區分類型。 – vadian

@vadian這就是我錯過的！謝謝！但是對於您的評論的其他部分，您是否有關於上述代碼的具體建議？ – LancelotKiin

我看到你已經創建了一個元組，爲了從元組訪問這些數據，我建議這種方法

let posts = (7, dataDictioanry: ["name": "Doe", "id": 2042, "website": "http://somedomaine.com/", "logo": "http://somedomaine.com/img/", "category_id": 33, "category": "Institutional partners", "order": 7]) 

posts.dataDictioanry["name"]

來源

2016-11-24 12:59:19

Swift 3 - 在投入值時總是得到零

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