/* 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;
}
/* 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;
}
本文标题：自定义 UINavigationController 开启滑动返
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