class Bridge {
// 前两个是使用__bridge
class func bridge<T: AnyObject>(obj: T) -> UnsafePointer<Void> {
return UnsafePointer(Unmanaged.passUnretained(obj).toOpaque())
}
class func bridge<T: AnyObject>(ptr: UnsafePointer<Void>) -> T {
return Unmanaged<T>.fromOpaque(COpaquePointer(ptr)).takeUnretainedValue()
}
// 后两个是__bridge_transfer
class func bridgeRetained<T : AnyObject>(obj : T) -> UnsafePointer<Void> {
return UnsafePointer(Unmanaged.passRetained(obj).toOpaque())
}
class func bridgeTransfer<T : AnyObject>(ptr : UnsafePointer<Void>) -> T {
return Unmanaged<T>.fromOpaque(COpaquePointer(ptr)).takeRetainedValue()
}
}
// 转UnsafeMutablePointer的话
UnsafeMutablePointer(Unmanaged.passUnretained(self).toOpaque())
