无法转换类型＆＃39; Int＆＃39;预期的参数类型＆＃39; UnsafeMutablePointer <int32>！＆＃39;

Question

使用此Answer我在swift 4.1中收到此错误，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")
    }

如何解决这个问题？

Answer 1

尝试这样的事情：

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")
    }
}