public static T MethodHook <T>(Class cls, Selector sel, T imp)
where T : class
{
if (imp is Delegate)
{
MethodHookInfo info;
string name = cls.Name + "|" + sel.Name;
if (_mHookList.ContainsKey(name))
{
info = _mHookList[name];
info.hook_imp = imp as Delegate;
Objc.class_replaceMethod(cls.Handle, sel.Handle, Marshal.GetFunctionPointerForDelegate(info.hook_imp), "@:");
}
else
{
info = new MethodHookInfo();
info.imp_type = typeof(T);
info.hook_imp = imp as Delegate;
info.old_imp = Objc.class_replaceMethod(cls.Handle, sel.Handle, Marshal.GetFunctionPointerForDelegate(info.hook_imp), "@:");
_mHookList.Add(name, info);
}
if (info.old_imp != IntPtr.Zero)
{
return(Marshal.GetDelegateForFunctionPointer(info.old_imp, typeof(T)) as T);
}
}
return(null);
}
public static void MethodUnhook(Class cls, Selector sel)
{
string name = cls.Name + "|" + sel.Name;
if (_mHookList.ContainsKey(name))
{
MethodHookInfo info = _mHookList[name];
Objc.class_replaceMethod(cls.Handle, sel.Handle, info.old_imp, "@:");
_mHookList.Remove(name);
}
}
