iOS APP 在前台时弹出本地通知

iOS10 之后使用才有效果

1.在 AppDelegate.m 文件里面添加下面的方法。

- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {

    completionHandler(UNNotificationPresentationOptionBadge
                      |UNNotificationPresentationOptionSound
                      |UNNotificationPresentationOptionAlert);
}

2. 对content添加属性的方式实现。

               UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
                content.body = @"本地通知--content";
                content.title = @"本地通知--title";
                content.sound = [UNNotificationSound defaultSound];
                content.badge = @(msgArr.count);
                //10之后的系统可以设置在前台显示
                [content setValue:@(YES) forKeyPath:@"shouldAlwaysAlertWhileAppIsForeground"];
                //  触发模式
                UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:1 repeats:NO];

                // 创建本地通知
                NSString *requestIdentifer = [NSString stringWithFormat:@"TestRequestww1%u",arc4random() % 1000];
                UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:requestIdentifer content:content trigger:trigger];

                //把通知加到UNUserNotificationCenter, 到指定触发点会被触发
                [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {

                }];