'AnyObject'沒有名爲'contactName'的成員阻止我的循環

Question

我正在尋找從函數中讀取coredata中的數據並在事後循環結果的最佳方法。

我已經嘗試了很多方法，但似乎掛起了試圖獲取每個對象內的特定數據片斷。

這是我的設置。

func readData()->NSArray{ 
    let entityName:String = "Properties" 
    let appDel:AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate 
    let context:NSManagedObjectContext = appDel.managedObjectContext 

    // Specify what this will be working with 
    let request = NSFetchRequest(entityName: entityName) 

    // This will return instance of the object needed. Without which this would be 
    // a pain to work with. This bit saves a few steps. 
    request.returnsObjectsAsFaults = false; 

    // Get the data and put it into a variable 
    var results = context.executeFetchRequest(request, error: nil) 

    return results! 
} 

而且我在這裏把它..

var properties = Properties() 
    var getInfo = properties.readData() 
    println(getInfo) 

    for eachInfo:AnyObject in getInfo{ 
     println(eachInfo) 
    } 

這轉儲出這樣的事情...

<NSManagedObject: 0x7f87fa711d60> (entity: Properties; id: 0xd000000000040000 <x-coredata://F627AD12-3CEC-4117-8294-616ADEE068DC/Properties/p1> ; data: { 
acreage = 0; 
conditionId = 0; 
contactBusinessName = nil; 
contactEmail = nil; 
contactName = Bob; 
contactPhoneNumber = 456456456; 
isFav = nil; 
latitude = 0; 
longitude = 0; 
price = 0; 
propertyCity = nil; 
propertyId = nil; 
propertyState = nil; 
propertyStreetAddress = nil; 
propertyType = 0; 
propertyZip = nil; 
squareFeet = 0; 
year = 0; 

}）

這是偉大的。但當我去訪問下面的代碼內的數據......

for eachInfo:AnyObject in getInfo{ 
     println(eachInfo.contactName) 
    } 

我得到以下錯誤。

「‘AnyObject’沒有一個名爲成員‘聯繫人姓名’」

我相信有一些簡單的我失蹤，但我不能找到它。

任何協助，甚至更好的方式將不勝感激。

---

已回答。

首先，將名稱空間添加到核心數據對象。 http://i.stack.imgur.com/qNNLo.png

其次，強類型的函數的輸出，以便數據輸入到自定義對象。在這種情況下，它被稱爲「屬性」。

func readData()->Array<Properties>{ 


    let appDel:AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate 
    let context:NSManagedObjectContext = appDel.managedObjectContext 

    // Specify what this will be working with 
    let request = NSFetchRequest(entityName: entityName) 

    // This will return instance of the object needed. Without which this would be 
    // a pain to work with. This bit saves a few steps. 
    request.returnsObjectsAsFaults = false; 

    // Get the data and put it into a variable 
    var results = context.executeFetchRequest(request, error: nil) 

    return results! as Array<Properties> 


} 

最後，調用函數並遍歷數據。

 var properties = Properties() 
    var getInfo = properties.readData() 

    for eachInfo in getInfo{ 

     println(eachInfo.contactName) 

    } 

Answer 1

嘗試

func readData()->Array<Properties>{ 
    let entityName:String = "Properties" 
    let appDel:AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate 
    let context:NSManagedObjectContext = appDel.managedObjectContext 

    // Specify what this will be working with 
    let request = NSFetchRequest(entityName: entityName) 

    // This will return instance of the object needed. Without which this would be 
    // a pain to work with. This bit saves a few steps. 
    request.returnsObjectsAsFaults = false; 

    // Get the data and put it into a variable 
    var results = context.executeFetchRequest(request, error: nil) 

    return results! as Array<Properties> 
} 

var getInfo:Array<Properties> = properties.readData() 
println(getInfo) 

for eachInfo in getInfo{ 
    println(info.contactName) 

} 

我沒有在Mac在這裏，但我敢肯定的財產以後這樣的作品。這樣你就可以強有力地鍵入數據。

Answer 2

找到它。

將結果作爲NSArray傳回時，需要在此情況下將其轉換爲NSManageObject類。

因此，正確調用並顯示返回內部的單個信息看起來像這樣。

var properties = Properties() 
    var getInfo = properties.readData() 
    println(getInfo) 

    for eachInfo:AnyObject in getInfo{ 

     // Cast AnyObject type into the equavalent NSManagedObject. 
     let info = eachInfo as Properties 
     println(info.contactName) 

    }