View 的Push 方法：

?? if let tabVC = UIApplication.shared.keyWindow?.rootViewController as? UITabBarController,

? ? ? ? let?navi = tabVC.selectedViewControlleras?UINavigationController{

? ? ? ? ? ? let?playVC =BCPlayerViewController()

? ? ? ? ? ? playVC.hidesBottomBarWhenPushed = true

? ? ? ? ? ? navi.pushViewController(playVC,animated:true)

? ? ? ? }

問(wèn)題：當(dāng)在?BCPlayerViewController?popViewController 回去時(shí)出現(xiàn)界面卡頓

原因：BCPlayerViewController 上添加了一個(gè)UIImageView ：

?bgImageView.frame = CGRectMake(0, 0,kScreenWidth, kScreenHeight)

?bgImageView.sd_setImage(with: NSURL(string: BCPlayerManager.shared.player?.songModel.albumimg ?? "") as URL?, ? ? ? placeholderImage: UIImage(named: "lost_icon"))

bgImageView.contentMode = .scaleAspectFill

?view.addSubview(bgImageView)

?解決方式：在popViewController 之前，移除這個(gè)UIImageView

? bgImageView.removeFromSuperview()

? ?self.navigationController?.popViewController(animated: true)

另：真正的原因是這一句：bgImageView.sd_setImage(with: NSURL(string: BCPlayerManager.shared.player?.songModel.albumimg ?? "")?as?URL?, ? ? ? placeholderImage: UIImage(named: "lost_icon")) 取消了就沒(méi)事了。原因不明。