iPhone上的限制推送通知的声音？ [英] Limits on iPhone push notification sounds?

问题描述

有谁知道，可以在一个iPhone应用程序接收到推送通知播放的声音是否有限制？具体来说，有一个最大的音长？

Does anybody know of any limitations on the sounds that can be played when an iPhone app receives a push notification? Specifically, is there a maximum sound length?

此外，我假设声音的音量会匹配任何用户设置自己的铃声音量，并且如果设置为振动模式时，手机会震动，而不是播放声音。这是正确的？

Also, I am assuming that the volume of the sound will match whatever the user has set their ringer volume to, and if set to vibrate mode, the phone will vibrate instead of playing a sound. Is this correct?

推荐答案

我已经测试推送通知音频告警，这并不奇怪竟然是30秒的最大长度。再音频文件将导致内置三音警报正在发挥吧。

I have tested the maximum length of a push notification audio alert, which not surprisingly turned out to be 30 seconds. Any longer audio files will result in the built-in Tri-tone alert being played instead.

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