可以;定义和使用协议

-1

我想将一些Objective-C代码迁移到我的Swift代码，但在Swift中存在一些协议错误。在我的Objective-C中，所有工作都很完美。可以;定义和使用协议

我有一类说MGCDayPlannerEKViewController，

public class MGCDayPlannerEKViewController : MGCDayPlannerViewController, UIPopoverPresentationControllerDelegate { 

    public var calendar: NSCalendar! 
    public var visibleCalendars: Set<NSObject>! 
    public var eventStore: EKEventStore! { get } 
    weak public var delegate: MGCDayPlannerEKViewControllerDelegate! 

    /** designated initializer */ 
    public init!(eventStore: EKEventStore!) 
    public func reloadEvents() 
} 

public protocol MGCDayPlannerEKViewControllerDelegate : NSObjectProtocol { 

    @available(iOS 4.0, *) 
    optional public func dayPlannerEKEViewController(vc: MGCDayPlannerEKViewController!, willPresentEventViewController eventViewController: EKEventViewController!) 
    @available(iOS 4.0, *) 
    optional public func dayPlannerEKViewController(vc: MGCDayPlannerEKViewController!, navigationControllerForPresentingEventViewController eventViewController: EKEventViewController!) -> UINavigationController! 
}

在我的雨燕类，我继承这个类，并创建我的新类

protocol WeekViewControllerDelegate :MGCDayPlannerEKViewControllerDelegate,CalendarViewControllerDelegate,UIViewControllerTransitioningDelegate { 

} 
class WeekViewController: MGCDayPlannerEKViewController { 

    var delegate: WeekViewControllerDelegate? 
    var showDimmedTimeRanges = false 
    var isiPad : Bool { 
     if UIDevice.currentDevice().userInterfaceIdiom == .Pad { 
      return true 
     }else{ 
      return false 
     } 
    } 
}

内一个协议，但在这里，我得到错误在委托声明中。错误是

Property 'delegate' with type 'WeekViewControllerDelegate?' cannot override a property with type 'MGCDayPlannerEKViewControllerDelegate!' (aka 'ImplicitlyUnwrappedOptional<MGCDayPlannerEKViewControllerDelegate>')

我在做什么错？

来源

2016-12-28 H Raval

此错误意味着在您的父类中有一个与它的子项名称相同的属性。在您的代码WeekViewController和MGCDayPlannerEKViewController有一个属性称为delegate。您需要重命名类别MGCDayPlannerEKViewController或WeekViewController中的变量delegate。

来源

2016-12-28 10:36:34

可以;定义和使用协议

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