無法將類型“ Int”的值轉換為預期的參數類型“ UnsafeMutablePointer <Int32> ！

Question

通過使用此答案，我在swift 4.1中遇到此錯誤，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")
    }

如何解決呢？

Answer 1

嘗試這樣的事情：

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")
    }
}