iOS电话等中断事件的开始和结束通知

#import "ViewController.h"#import <AVFoundation/AVFoundation.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleAudioSessionInterruptNoti:) name:AVAudioSessionInterruptionNotification object:[AVAudioSession sharedInstance]];}//音频播放中断的通知-(void)handleAudioSessionInterruptNoti:(NSNotification*)noti{    NSDictionary *userInfo = noti.userInfo;    AVAudioSessionInterruptionType type = [userInfo[AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];    switch (type)    {        case AVAudioSessionInterruptionTypeBegan:        {            //需要停止播放操作        }            break;        case AVAudioSessionInterruptionTypeEnded:        {            AVAudioSessionInterruptionOptions options = [userInfo[AVAudioSessionInterruptionOptionKey] unsignedIntegerValue];            if (options == AVAudioSessionInterruptionOptionShouldResume)            {                //需要执行播放操作            }        }            break;        default:            break;    }}