'locationManager(_:didUpdateLocations:)' 的参数与协议 'CLLocationManagerDelegate' 预期的可选性不同

Question

我已经在我的 viewcontroller 中实现了 CLLocationManagerDelegate，但我收到以下警告

Parameters of 'locationManager(_:didUpdateLocations:)' have different optionality than expected by protocol 'CLLocationManagerDelegate'

Parameters of 'locationManager(_:didFailWithError:)' have different optionality than expected by protocol 'CLLocationManagerDelegate'

Parameter of 'locationManager(_:didChangeAuthorizationStatus:)' has different optionality than expected by protocol 'CLLocationManagerDelegate'

由此我明白了 “ 参数的可选性（变量是否可选）与原始协议方法定义中的不同 “

但是我没发现原件和我带的有什么区别。

在这里

在协议定义中

optional public func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])

optional public func locationManager(manager: CLLocationManager, didFailWithError error: NSError)

optional public func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus)

在我实现的协议中

func locationManager(manager: CLLocationManager,
        didUpdateLocations locations: [CLLocation])

func locationManager(manager: CLLocationManager,
        didFailWithError error: NSError)

func locationManager(manager: CLLocationManager,
        didChangeAuthorizationStatus status: CLAuthorizationStatus)

我的xcode版本是7.1.1

谁能解释一下为什么弹出警告？

Answer 1

重新启动 xcode 解决了问题...有时事情很奇怪

'locationManager(_:didUpdateLocations:)' 的参数与协议 'CLLocationManagerDelegate' 预期的可选性不同

Parameters of 'locationManager(_:didUpdateLocations:)' has different optionality than expected by protocol 'CLLocationManagerDelegate'

ios

xcode

swift

cllocationmanager

optional-parameters