因為在IOS8中要想設(shè)置applicationIconBadgeNumber鸥咖，需要用戶的授權(quán)结借，在IOS8中妓羊，需要加上下面的代碼：
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
但是這兩句如果是在IOS7的系統(tǒng)中運行的話就會報錯顶岸，所以需要先判斷IOS的版本精拟，完整代碼如下：
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 8.0) {
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
}
如果是注冊消息推送的話，需要這樣寫：
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 8.0) {
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[application registerForRemoteNotifications];
}
