ios13.0 后修改系统音量
if (([musicPlayer respondsToSelector:@selector(setVolume:)]) && [[[UIDevice currentDevice]
systemVersion] floatValue] >= 13.0) {
//消除警告
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
[musicPlayer setVolume:volume];
#pragma clang diagnostic pop
}
ios13.0 之前修改系统音量
MPVolumeView *volumeView = [[MPVolumeView alloc] init];
volumeView.frame = CGRectMake(-1000, -100, 100, 100);
UISlider* volumeViewSlider = nil;
for (UIView *view in [volumeView subviews]){
if ([view.class.description isEqualToString:@"MPVolumeSlider"]){
volumeViewSlider = (UISlider*)view;
break;
}
}
[volumeViewSlider setValue:volume animated:YES];
ios 监听系统音量
if (@available(iOS 15.0,*)) {
AVAudioSession *audio = [AVAudioSession sharedInstance];
[audio addObserver:self forKeyPath:@"outputVolume" options:NSKeyValueObservingOptionNew context:nil];
}else{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(volumeChanged:) name:@"AVSystemController_SystemVolumeDidChangeNotification" object:nil];
}
// 监听音量改变
-(void)volumeChanged:(NSNotification *)notification{
self.volum = [[[notification userInfo] objectForKey:@"AVSystemController_SystemVolumeDidChangeNotification"] floatValue];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqual:@"outputVolume"]) {
// NSLog(@"%@", change);
self.volum = [[change objectForKey:@"new"] floatValue];
}
}
