自定义返回按钮侧滑返回失效

在b控制器中加入

self.navigationController.interactivePopGestureRecognizer.delegate= (id)self;

self.navigationController.interactivePopGestureRecognizer.enabled=YES;

- (void)viewDidAppear:(BOOL)animated

{

[super viewDidAppear:animated];

self.navigationController.interactivePopGestureRecognizer.enabled = NO;}