斯威夫特3 UnsafePointer（$ 0）在Xcode不再编译8测试版6

我的一小段代码片段如下...：

：

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

...确实不再与下面的错误，我不明白编译

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

如何解决？

来源

2016-08-19 Stéphane de Luca

注意http://stackoverflow.com/a/25623647/1187415已经更新为当前斯威夫特3. –

119

从Xcode的8个β6的发行说明：

一种Unsafe[Mutable]RawPointer类型已被引入，替换Unsafe[Mutable]Pointer<Void>。已从UnsafePointer<T>转换为 UnsafePointer<U>已被禁止。 Unsafe[Mutable]RawPointer 提供了用于非类型化内存访问的API，以及用于将内存绑定到类型的API。绑定内存允许在指针类型之间进行安全转换。见bindMemory(to:capacity:),assumingMemoryBound(to:), 和withMemoryRebound(to:capacity:)。（SE-0107）

在你的情况，你可能需要编写这样的事：

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

来源

2016-08-19 21:45:53 OOPer

是，它为me..Thanks工作 – TBI

更换

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

与

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

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

      SCNetworkReachabilityCreateWithAddress(nil, $0) 

     } 

    }) else { 

     return false 
    }

来源

2016-09-29 08:04:50 macfnl

斯威夫特3更新了语法，确切的解决方案是，

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

来源

2017-01-10 12:04:04 Gaurav

斯威夫特3 UnsafePointer（$ 0）在Xcode不再编译8测试版6

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