本文语法为Swift4
代码
主要涉及到距离传感器的调用
代码语言：javascript复制func addProximityMonitoring(){
UIDevice.current.isProximityMonitoringEnabled = true;
if(UIDevice.current.isProximityMonitoringEnabled){
NotificationCenter.default.addObserver(self, selector: #selector(ChatViewController.sensorStateChange(_:)), name: NSNotification.Name.UIDeviceProximityStateDidChange, object: nil);
}
}
func removeProximityMonitoring(){
UIDevice.current.isProximityMonitoringEnabled = true;
if(UIDevice.current.isProximityMonitoringEnabled){
UIDevice.current.isProximityMonitoringEnabled = false;
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIDeviceProximityStateDidChange, object: nil);
}
}
@objc func sensorStateChange(_ notification:NotificationCenter){
do{
if(UIDevice.current.proximityState){
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord);
}else{
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback);
}
}catch{
}
}
