我试图弄清楚如何等待一个类函数的回调（我想）。
我的课看起来像这样：
public class DataLogOut
{
public delegate void OnLogoutResponse(ResponseData data);
public event OnLogoutResponse onLogoutResponse;
public static void LogoutPlayer()
{
new EndSessionRequest().SetDurable(true).Send((response) => {
if (!response.HasErrors)
{
GS.Reset();
if (onLogoutResponse != null)
{
onLogoutResponse(new ResponseData()
{
//data = response
});
}
}
else
{
if (onLogoutResponse != null)
{
onLogoutResponse(new ResponseData()
{
errors = response.Errors,
hasErrors = response.HasErrors
});
}
}
});
}
}
现在，我这样称呼“ LogOutPlayer”：
public void LogOut()
{
DataLogOut.LogoutPlayer();
DataLogOut.onLogoutResponse += onLogoutResponse;
}
现在我在两个脚本中都出错。在第一篇中，我得到了：委托调用可以简化
...并且在第二个脚本中，我不允许这样做：
DataLogOut.onLogoutResponse += onLogoutResponse;
真的希望有人可以帮助我，在此先感谢:-)
您的代码中有几个问题。请查看评论：
public class DataLogOut
{
// No need for this, we will use "EventHandler"
// public delegate void OnLogoutResponse(ResponseData data);
//public event OnLogoutResponse onLogoutResponse; -> replaced by
public event EventHandler<ResponseData> onLogoutResponse;
// Convenience Method to fire the event
protected virtual void OnLogoutResponse( ResponseData data )
{
var handler = onLogoutResponse;
if( handler != null ){
handler( this, data );
}
}
// Let's simplify it by making it non-static
//public static void LogoutPlayer()
public void LogoutPlayer
{
new EndSessionRequest().SetDurable(true).Send((response) => {
if (!response.HasErrors)
{
GS.Reset();
OnLogoutResponse(new ResponseData()
{
//data = response
});
}
else
{
OnLogoutResponse(new ResponseData()
{
errors = response.Errors,
hasErrors = response.HasErrors
});
}
});
}
}
用法：
public void LogOut()
{
// I made it non-static, so we need an instance ...
var logout = new DataLogout();
// first register for the event, then have it fired.
logout.onLogoutResponse += onLogoutResponse;
// ^-- You tried to register the handler on the class. Which failed,
// because the event was not static.
logout.LogoutPlayer();
}
// the handler's signature now must look like this:
public void onLogoutResponse( object sender, ResponseData data ){
// your code here
}
如果您想保留它static，那么也将事件设为静态：
public static event EventHandler<ResponseData> onLogoutResponse;
那么您也需要使便捷事件触发为静态
protected static void OnLogoutResponse( ResponseData data )
{
var handler = onLogoutResponse;
if( handler != null ){
handler( typeof(DataLogout), data ); // cannot use "this", of course in static context.
}
}
然后可以像您的示例一样使用它：
public void LogOut()
{
// first register for the event, then have it fired.
DataLogout.onLogoutResponse += onLogoutResponse;
// ^-- You tried to register the handler on the class. Which failed,
// because the event was not static.
DataLogout.LogoutPlayer();
}
// the handler's signature now must look like this:
public void onLogoutResponse( object sender, ResponseData data ){
// your code here
}
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