ios - iOS 11 中的静默推送通知被忽略。

Question

如果我在 iOS 11 上尝试发送静音推送通知(无角标(Badge)/声音/警报)并且只是内容可用，根据静音通知的规范，通知将被忽略并且不会转发到应用程序。

这是通知

{
    "aps" : {
        "content-available" : 1,
    }, 
    "type" : "0"
}

设备日志有:

<Error>: Ignoring notification with no alert, sound or badge (it.my.app.dev): C146-3838

更完整:

Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Received remote notification request C146-3838 [ hasAlertContent: 0, hasSound: 0 hasBadge: 0 hasContentAvailable: 1 hasMutableContent: 0 ]
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Deliver push notification request C146-3838
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Passing content-available push to Duet
Dec 27 10:11:30 iPierX SpringBoard(DuetActivityScheduler)[59] <Notice>: SUBMITTING: <private>
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Error>: Ignoring notification with no alert, sound or badge (it.my.app.dev): C146-3838
Dec 27 10:11:30 iPierX SpringBoard(UserNotificationsServer)[59] <Notice>: [it.my.app.dev] Not saving push notification C146-3838 to store [ error=Error Domain=UNErrorDomain Code=1401 "Notification has no user-facing content" UserInfo={NSLocalizedDescription=Notification has no user-facing content} ]
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: Submitted Activity: com.apple.pushLaunch.it.my.app.dev:EA2367 <private>
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: Daemon Canceling Activities: {(
    com.apple.pushLaunch.it.my.app.dev:EA2367
)}
Dec 27 10:11:30 iPierX dasd(DuetActivitySchedulerDaemon)[1645] <Notice>: CANCELED: com.apple.pushLaunch.it.my.app.dev:EA2367 <private>

Answer 1

这也有效，并且在它到达时不播放声音:

{
    aps = {
        "content-available" : 1,
        sound : ""
    };
}