在自定義返回按鈕的時候，側滑手勢返回往往默認失效了，怎么讓側滑有效呢

UIButton? *btn =[UIButton buttonWithType:UIButtonTypeCustom];

[btn setTitle:@"返回" forState:UIControlStateNormal];

[btn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

btn.frame=CGRectMake(0, 0, 60, 40);

[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

UIBarButtonItem? *item =[[UIBarButtonItem alloc]initWithCustomView:btn];

self.navigationItem.leftBarButtonItem=item;

添加下面這一句代碼即可

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