一级页面进行系统右滑返回，导致整个app卡死

解决方法： app一级页面，大家都知道再返回是没有任何相关的页面，由于这个原因造成页面卡死，所以现在在一级页面分别添加禁用和开启右滑返回手势。

/在一级界面显示出来后取消右滑手势/

• (void)viewDidAppear:(BOOL)animated {
  [super viewDidAppear:animated];

  [self cancelSideBack];
  }
  /在一级界面消失后开启右滑手势/

• (void)viewDidDisappear:(BOOL)animated {
  [super viewDidDisappear:animated];

  [self startSideBack];
  }

/** * 关闭ios右滑返回 */

• (void)cancelSideBack
  {
  self.isCanUseSideBack = NO;

  if([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
  self.navigationController.interactivePopGestureRecognizer.delegate=(id)self;
  }
  }

/* 开启ios右滑返回 */

• (void)startSideBack
  {
  self.isCanUseSideBack=YES;

  if([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
  self.navigationController.interactivePopGestureRecognizer.delegate = nil;
  }
  }

/当在第一级界面右滑时会返回yes，因为可能你已经push过了然后又pop回来，以至于右滑被关闭，所以需要设置为yes/

• (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer*)gestureRecognizer {
  return self.isCanUseSideBack;
  }