1、导航手势侧滑导致导航华东不流畅或者有缺块,如:viewControllerA-->viewControllerB
解决办法:1.检查A-->B时,B界面的backGroundColoer是否设置,否则透明色会导致这种现象
2.分别在A界面的viewWillAppear和viewWilldisAppear方法添加
[self.navigationController setNavigationBarHidden:NO animated:YES];
[self.navigationController setNavigationBarHidden:YES animated:YES];