无法将“Int”类型的值转换为预期的参数类型“UnsafeMutablePointer<Int32>！”

Question

通过使用这个Answer，我在 swift 4.1 中遇到了这个错误，即Cannot convert value of type 'Int' to expected argument type 'UnsafeMutablePointer<Int32>!'

var notify_token: Int
notify_register_dispatch("com.apple.springboard.lockstate", notify_token, DispatchQueue.main, { (_ token: Int) -> Void in 
    var state: UInt64 = UINT64_MAX
    notify_get_state(token, state)
    if state == 0 {
        print("unlock device")
    }
    else {
        print("lock device")
    }

如何解决？

Answer 1

试试这样的：

var notify_token: Int32

notify_register_dispatch("com.apple.springboard.lockstate", &notify_token, DispatchQueue.main, { (_ token: Int) -> Void in
    var state: UInt64 = UINT64_MAX
    notify_get_state(token, state)
    if state == 0 {
        print("unlock device")
    }
    else {
        print("lock device")
    }
}