objective-c - 自定义NSUserNotification对象

我正在尝试修改NSUserNotifictation以传递自定义变量：

@interface MyUserNotification: NSUserNotification
@property (nonatomic) int theid;
@property (nonatomic) NSString* url;
@end

@implementation MyUserNotification
@end

然后在我的AppDelegate对象中初始化时：

MyUserNotification *notification = [[MyUserNotification alloc] init];
notification.theid = theid;

设置theid会引发错误：

-[_NSConcreteUserNotification setTheid:]: unrecognized selector sent to instance 0x100204840

为什么NSConcreteUserNotification对象参与其中？

最佳答案

因此，此类似乎不是要重写的，而是个好消息：是否有userInfo格？

因此，您可以将任何对象作为KV对存储在userInfo字典中。

int theid;
NSUserNotification *notification = [[NSUserNotification alloc] init];
NSDictionary * userInfo = [NSMutableDictionary dictionary];
[userInfo setValue:@(theid) forKey:@"theid"];
notification.userInfo = userInfo;