//为了隐藏默认的返回按钮
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:[UIView new]];
//开启手势操作
self.navigationController.interactivePopGestureRecognizer.delegate = nil;
iOS7 滑动返回相关总结
原文：http://my.oschina.net/u/811205/blog/384784
