無法將[AnyObject]類型的值轉換爲期望的參數類型[PFObject] - 解析＆Swift II錯誤

-1

這是失敗的行，錯誤消息爲「無法將類型[AnyObject]的值轉換爲期望的參數類型[ PFObject]」無法將[AnyObject]類型的值轉換爲期望的參數類型[PFObject] - 解析＆Swift II錯誤

self.customObtainAllHandlerWithObjects（對象，成功：成功，失敗：失敗）

進口的UIKit 進口解析

類AbstractService：BaseService {

private let _cache = AbstractCache<T>() 
private let _parser = AbstractParser<T>() 

/// Store all completionHandlers for convertFromParseObject operations here. Need this to avoid a concurrent conversions of the same object. 
var conversions = Dictionary<String, [(entity: T) -> Void]>() 

/// Contains ids of objects, which need their videos to be downloaded. 
var queue: [(entityId: String, file: PFFile)] = [] 
var isQueueDownloading = false 

var className: String { 
    get { 
     fatalError("This property must be overridden") 
    } 
} 

// MARK: - Create 

func createEntity() -> T { 
    let entity = T() 
    cache().appendEntity(entity) 
    return entity 
} 

// MARK: - Obtain all 

/// Base method, which obtains entities from Parse database. 
/// 
/// - parameter skip: Number of records, which will be skipped. 
/// - parameter limit: Max number of entities returned. 
/// - parameter constraints: A block, which applies constraints to PFQuery. E.g. query.includeKey("author") or query.whereKey("user", equalTo: PFUser.currentUser()). 
/// - parameter success: Success block. Executes when operation successfully finished. 
/// - parameter failure: Failure block. Executes when operation fails. 

func obtain(skip skip: Int?, limit: Int?, constraints applyConstraints: ((query: PFQuery) -> PFQuery)?, success: (entities: [T]) -> Void, failure: FailureCompletionHandler) { 
    var query = PFQuery(className: className) 
    if let skip = skip { 
     query.skip = skip 
    } 
    query.limit = limit ?? 1000 
    if let applyConstraints = applyConstraints { 
     query = applyConstraints(query: query) 
    } 
    query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in 
     if let error = error { 
      self.callFailureCompletionHandler(failure, error: error) 
     } 
     else { 
      if let objects = objects { 
       self.customObtainAllHandlerWithObjects(objects, success: success, failure: failure) 
      } 
      else { 
       failure(allowRetry: false, errorMessage: "Cannot load \(self.className)") 
      } 
     } 
    } 
}

來源

2015-12-08 Bikini Body

請不要用截圖來展示您的代碼：If一個想驗證它，好心靈將不得不重新鍵入它。此外，它很難閱讀。請添加[最小，完整和可驗證的示例]（http://www.stackoverflow.com/help/mcve）。您可能想閱讀[我如何提出一個好問題]（http://stackoverflow.com/help/how-to-ask），這會增加獲得有用答案的可能性_drastically_。 –

行動，對不起。通過入門指南應該做得更好。試圖找出解決辦法並尋找快速解決方案非常沮喪。 –

你得到這個錯誤，因爲對象類型爲[AnyObject]但你調用函數 - customObtainHandler - 期待PFObject所以你將不得不轉換您的對象更改爲PFObject。

您可以使用作爲關鍵字在類型之間進行轉換。

所以你做這樣的事情：

if let myVar as? PFObject { 
    // now myVar is a PFObject 
}

我不建議這樣做，但你也可以強制使用它轉換：

myVar as! PFObject

來源

2015-12-08 22:08:56 Peyman

無法將[AnyObject]類型的值轉換爲期望的參數類型[PFObject] - 解析＆Swift II錯誤

回答

相關問題