XQMuse/Root/Course/VC/CourseDetialOfflineVC.swift
@@ -183,10 +183,7 @@ var v = min(scrollView.contentOffset.y / JQ_NavBarHeight, 1) if view_video.isHidden{v = 1.0;return} navigationController?.navigationBar.standardAppearance.backgroundColor = .white.withAlphaComponent(v) print("--->\(v)") if v > 0{ (navigationItem.leftBarButtonItem?.customView as? UIButton)?.setImage(UIImage(named: "btn_back")?.withTintColor(.black.withAlphaComponent(v)), for: .normal)
