自定义 UINavigationController 开启滑动返回效果

/* 为 self 创造弱引用 */

__weak typeof(self) weakSelf = self;

/* 开启返回手势效果 */

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {

self.interactivePopGestureRecognizer.delegate = weakSelf;

}