解决使用[self.navigationController pushViewController:VC animated:YES]; push卡顿

例 1

UIViewController *vc = [UIViewController new];

[self.navigationController pushViewController:vc animated:YES];

上述代码推出界面会卡顿

解决办法：

UIViewController *vc = [UIViewController new];

vc.view.backgroundColor = [UIColor 推出时你想要的控制器View的颜色]

/**

*  如

*/

vc.view.backgroundColor = [UIColor whiteColor];

[self.navigationController pushViewController:vc animated:YES];