Question

我正在创建一个应用程序，我必须在视图控制器中打开2-3个视图控制器，因为我想为这些视图控制器共享相同的滑动抽屉和导航栏。我已经关注了this教程。

我在 MainController 中使用了 ContainerView ，并且正确添加了子控制器，但我很难调整子控制器的大小以匹配containerview

 self.mainContainer.addSubview(vc.view)
 self.mainContainer.translatesAutoresizingMaskIntoConstraints = false
 addChildViewController(vc)
 NSLayoutConstraint.activate([
 vc.view.leadingAnchor.constraint(equalTo:mainContainer.leadingAnchor),
 vc.view.trailingAnchor.constraint(equalTo: mainContainer.trailingAnchor),
 vc.view.topAnchor.constraint(equalTo: mainContainer.topAnchor),
 vc.view.bottomAnchor.constraint(equalTo: mainContainer.bottomAnchor)
 ])
vc.didMove(toParentViewController: self)

我收到以下错误

[LayoutConstraints] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. 
    Try this: 
        (1) look at each constraint and try to figure out which you don't expect; 
        (2) find the code that added the unwanted constraint or constraints and fix it. 
    (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSAutoresizingMaskLayoutConstraint:0x170095c70 h=-&- v=-&- UIView:0x127e17630.midY == UIView:0x127e15070.midY + 32   (active)>",
    "<NSLayoutConstraint:0x1740970c0 V:|-(0)-[UIView:0x127e17630]   (active, names: '|':UIView:0x127e15070 )>",
    "<NSLayoutConstraint:0x174097020 UIView:0x127e17630.bottom == UIView:0x127e15070.bottom   (active)>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x174097020 UIView:0x127e17630.bottom == UIView:0x127e15070.bottom   (active)>

我认为 self.mainContainer.translatesAutoresizingMaskIntoConstraints = false 在某种程度上不起作用子视图控制器未正确调整大小，因为在导航栏大约64 的主控制器中，相同高度的部分将从底部剪切到子视图控制器中。

MainController的元素约束

navbar left = top = right = 0，height = 64
UIContainerView left = right = bottom = 0 and top to navbar = 0

Answer 1

vc.view.translatesAutoresizingMaskIntoConstraints = false

Answer 2

您可以简单地设置vc's的框架，即

，而不是将约束应用于view vc。

    vc.view.frame = self.containerView.bounds //Here
    self.containerView.addSubview(vc.view)
    self.addChildViewController(vc)
    vc.didMove(toParentViewController: self)

在UIContainerView swift ios中调整子视图控制器的大小

2 个答案: