要预加载UIViewController
的视图,只需访问其view
属性:
let _ = myViewController.view
要将所有视图控制器预加载到UITabBarController
,您可以执行以下操作:
if let viewControllers = tabBarController.viewControllers {
for viewController in viewControllers {
let _ = viewController.view
}
}
或者更紧凑一些:
tabBarController.viewControllers?.forEach { let _ = $0.view }