无法使用类型为int的rvalue初始化UIRemote NotificationType类型的参数

Question

当我使用[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];注册远程推送通知时，会发生错误cannot initialize a parameter of type 'UIRemoteNotificationType' with an rvalue of type 'int'，有人知道为什么吗？谢谢。

我的项目环境：Xcode 4.2 + iOS 5.

Answer 1

您应该明确地将其强制转换为UIRemoteNotificationType

[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationType)(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];