斯威夫特3 UnsafePointer（$ 0）在Xcode不再編譯8測試版6

我的一小段代碼片段如下...：

：

let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) { 
     SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0)) 
    }

...確實不再與下面的錯誤，我不明白編譯

"'init' is unavailable: use 'withMemoryRebound(to:capacity:_)' to temporarily view memory as another layout-compatible type."

如何解決？

來源

2016-08-19 Stéphane de Luca

注意http://stackoverflow.com/a/25623647/1187415已經更新爲當前斯威夫特3. –

119

從Xcode的8個β6的發行說明：

一種Unsafe[Mutable]RawPointer類型已被引入，替換Unsafe[Mutable]Pointer<Void>。已從UnsafePointer<T>轉換爲 UnsafePointer<U>已被禁止。 Unsafe[Mutable]RawPointer 提供了用於非類型化內存訪問的API，以及用於將內存綁定到類型的API。綁定內存允許在指針類型之間進行安全轉換。見bindMemory(to:capacity:),assumingMemoryBound(to:), 和withMemoryRebound(to:capacity:)。（SE-0107）

在你的情況，你可能需要編寫這樣的事：

let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) { 
    $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in 
     SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress) 
    } 
}

來源

2016-08-19 21:45:53 OOPer

是，它爲me..Thanks工作 – TBI

更換

let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) { 
    SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0)) 
}

與

guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, { 

     $0.withMemoryRebound(to: sockaddr.self, capacity: 1) { 

      SCNetworkReachabilityCreateWithAddress(nil, $0) 

     } 

    }) else { 

     return false 
    }

來源

2016-09-29 08:04:50 macfnl

斯威夫特3更新了語法，確切的解決方案是，

guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, { 
    $0.withMemoryRebound(to: sockaddr.self, capacity: 1) { 
     zeroSockAddress in SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)} 
}) else { 
    return false 
}

來源

2017-01-10 12:04:04 Gaurav

斯威夫特3 UnsafePointer（$ 0）在Xcode不再編譯8測試版6

回答

相關問題