使用相机时切入后台报错:Thread1:EXC_BAD_ACCESS(code=1,address=0x1)解决办法之一

来源：互联网发布：地形数据涉密规定编辑：程序博客网时间：2024/05/22 00:53

问题是ARC错误release的对象再次被release。

程序切入后台时不会走disapear方法

参考了http://songzengbin.github.io后总结如下

加入监听监听切入后台或进入前台,手动执行disappear

在init中

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(enterBackgorund:) name:UIApplicationDidEnterBackgroundNotification object:nil];    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(enterForeground:) name:UIApplicationWillEnterForegroundNotification object:nil];    #pragma mark application  enterBackgorund enterForeground-(void)enterBackgorund:(NSNotification *)notif{[self viewWillDisappear:YES];}-(void)enterForeground:(NSNotification *)notif{[self viewWillAppear:YES];}- (void)viewWillAppear:(BOOL)animated{[self.mapView viewWillAppear];self.isMapViewShowing = !self.mapView.hidden;self.mapView.delegate = self; // 此处记得不用的时候需要置nil，否则影响内存的释放}- (void)viewWillDisappear:(BOOL)animated{[self.mapView viewWillDisappear];self.isMapViewShowing = NO;self.mapView.delegate = nil; // 不用时，置nil}在dealloc中    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillEnterForegroundNotification object:nil];[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];

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