IOS setting System volume and listening system volume changes

Very simple to call

First introduced mediaplayer.framework in engineering

#import <MediaPlayer/MediaPlayer.h>

1. Get the System volume

Get System Volume

Mpvolumeview *volumeview = [[Mpvolumeview alloc] init];

UISlider *volumeviewslider= Nil;

For (UIView *view in [Volumeview Subviews]) {

if ([View.class.description isequaltostring:@ "Mpvolumeslider"]) {

Volumeviewslider = (uislider*) view;

Break

}

}

float systemvolume = Volumeviewslider.value;

2. Monitoring methods

[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (volumechanged:) name:@ " Avsystemcontroller_systemvolumedidchangenotification "Object:nil";

-(void) volumechanged: (nsnotification *) notification

{

[notification.userinfo[@ "Avsystemcontroller_audiovolumenotificationparameter"] floatvalue];

}

3. Remember to destroy OH

-(void) dealloc

{

[[Nsnotificationcenter Defaultcenter] removeobserver:self name:@ "Avsystemcontroller_ Systemvolumedidchangenotification "Object:nil";

}

IOS setting System volume and listening system volume changes