相关疑难解决方法(0)

如果我有一个像这样的方法:

func someMethod(contextPtr: UnsafeMutablePointer<Void>)

我如何从中获取对象contextPtr？

func someMethod(contextPtr: UnsafeMutablePointer<Void>){    
    let object:MyObject = contextPtr.memory
}

得到:

'Void'不能转换为'MyObject'

什么是秘诀

更多详情:

我在这里做的是设置一个全局回调函数SCNetworkReachability:

func callback(reachability:SCNetworkReachability, flags: SCNetworkReachabilityFlags, info: UnsafeMutablePointer<Void>) {

    let r:Reachability = info.memory
}

然后添加回调如下:

var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
var s = self
withUnsafeMutablePointer(&s) {
    context.info = UnsafeMutablePointer($0)
}
SCNetworkReachabilitySetCallback(reachability, callback, &context)