PN（推送通知）远程通知到达时如何长时间播放声音

Question

当使用Objective-c PN（推送通知）到达设备时，如何重复声音文件。

Answer 1

You can find how to Custom Alert Sounds in this website: Managing Your App's Notification Support and the ringtone can not be Over 30s

Preparing Custom Alert Sounds

For remote notifications in iOS, you can specify a custom sound that iOS plays when it presents a local or remote notification for an app. The sound files must be in the main bundle of the client app.

Custom alert sounds are played by the iOS system-sound facility, so they must be in one of the following audio data formats:

Linear PCM

MA4 (IMA/ADPCM)

µLaw

aLaw

You can package the audio data in an aiff, wav, or caf file. Then, in Xcode, add the sound file to your project as a nonlocalized resource of the app bundle.

You may use the afconvert tool to convert sounds. For example, to convert the 16-bit linear PCM system sound Submarine.aiff to IMA4 audio in a CAF file, use the following command in the Terminal app:

afconvert /System/Library/Sounds/Submarine.aiff ~/Desktop/sub.caf -d ima4 -f caff -v

You can inspect a sound to determine its data format by opening it in QuickTime Player and choosing Show Movie Inspector from the Movie menu.

Custom sounds must be under 30 seconds when played. If a custom sound is over that limit, the default system sound is played instead.

You can make this example dictionary send to APNs server with your custom alert sound name for the value of 'sound' :

// Create the payload body
$body['aps'] = array(
                    'alert' => 'TestNotification',
                    'sound' => 'YourCustomAlertSoundName.caf',
                    'badge' => 8

After making a good ringtone to your project's main bundle, the important step is to add the sound file you added (YourCustomAlertSoundName.caf) to Build Phases-> Copy Bundle Resources in the Project Settings, and the ringtone can not be Over 30s, otherwise the system will enable the default ringtone (default).

Answer 2

You just have to set custom file into sound on push payload. Put the same audio file into your build resource and just fire notification from server, it will play audio.

{
   "aps" : 
   { 
       "alert" : "This is your alert text" 
       "sound" : "YOUR_COSTOM_FILE_NAME.mp4"
   },
}

When the application is in foreground mode, then you need to play same audio file when you get receive notification.