小技巧集锦

1、设置图片颜色

self.navigationBar.tintColor = UIColor.white

2、禁止颜色更改

self.navigationController?.navigationBar.backIndicatorImage = 
UIImage.init(named: "return_icon")!.withRenderingMode(.alwaysOriginal)

3、右滑返回和scrollview滑动冲突

scrollView.panGestureRecognizer.require(toFail: (self.navigationController?.interactivePopGestureRecognizer)!)

4、导航栏右滑返回失效
http://www.hangge.com/blog/cache/detail_1092.html