EXC_BAD_ACCESS在HealthKit中讀取dateOfBirthWithError

Question

當我調用以下函數來讀取dataOfBirth時，我在設備上測試時一直收到錯誤的訪問錯誤。我在Xcode 7測試

func updateUsersAge(){ 

    do{ 
     var error : NSError! 
     let birthdate = try currentHealthStore.dateOfBirthWithError() 

     let now = NSDate() 

     let dateComponents = NSCalendar.currentCalendar().components(NSCalendarUnit.NSYearCalendarUnit, fromDate: birthdate, toDate: now, options: NSCalendarOptions.WrapComponents) 
     let age = dateComponents.year 

     self.ageValueLabel.text = NSNumberFormatter.localizedStringFromNumber(NSNumber(integer: age), numberStyle: NSNumberFormatterStyle.NoStyle) 

    } 
    catch{ 

     print("Not avaialble") 
    } 
} 

currentHealthStore在AppDelegate中定義爲全局變量使用夫特2.0：

let currentHealthStore = HKHealthStore() 

並且在接收到錯誤一旦這一行被執行：

let birthdate = try currentHealthStore.dateOfBirthWithError() 

Answer 1

此代碼適用於swift 2，XCode 7.1.1

let birthDay = try healthStore.dateOfBirth() 

在錯誤傳回給出之前已經使用名稱dateOfBirthWithError。