如果用户允许本地通知,是否没有简单的测试方法？在我拒绝发送本地通知后,我在控制台中发现了警告.当相关事件发生时,它表示该应用程序尝试发送通知,即使用户不允许它.我想在尝试显示通知之前检查是否允许它.在我的情况下看评论,我该怎么做？
我的代码是：
app = [UIApplication sharedApplication];
-(void)showBackgroundNotification:(Nsstring *) message {
//check if app is in background and check if local notifications are allowed.
if (app.applicationState == UIApplicationStateBackground /*&& localnotificationsAreAllowed*/){
UIlocalnotification *note = [[UIlocalnotification alloc]init];
note.alertBody = message;
note.fireDate = [NSDate dateWithTimeIntervalSinceNow:0.0];
[app schedulelocalnotification :note];
}
}
我得到用户的提示,如下所示：
UIUserNotificationSettings *settings;
if ([app respondsToSelector:@selector(registerUserNotificationSettings:)])
{
settings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeBadge|UIUserNotificationTypeAlert|UIUserNotification TypeSound) categories:nil];
[app registerUserNotificationSettings:settings];
}
我不能使用设置对象？
编辑：我想我已经解决了.这似乎有效.
-(void)showBackgroundNotification:(Nsstring *) message {
if (app.applicationState == UIApplicationStateBackground && [app currentUserNotificationSettings].types != UIUserNotificationTypeNone){
UIlocalnotification *note = [[UIlocalnotification alloc]init];
note.alertBody = message;
note.fireDate = [NSDate dateWithTimeIntervalSinceNow:0.0];
[app schedulelocalnotification :note];
}
}
解决方法
这是我在不太具体的情况下使用的内容：
+ (BOOL)notificationsEnabled {
UIUserNotificationSettings *settings = [[UIApplication sharedApplication] currentUserNotificationSettings];
return settings.types != UIUserNotificationTypeNone;
}
我通常在通知管理器中保留一组这些类型的方法.