【发布时间】:2018-01-19 12:20:08
【问题描述】:
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this 教程。
我在 MainController 中使用了 ContainerView 并且正确添加了子控制器,但我在调整子控制器的大小以匹配 containerview 时遇到了困难
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 无法正常工作 子视图控制器没有正确调整大小,因为在主控制器中 navbar 大约为 64 并且相同高度的部分从底部被剪裁在子视图控制器中。
MainController的元素约束
导航栏左=上=右=0,高度=64
UIContainerView left=right=bottom=0 and top to navbar = 0
【问题讨论】:
-
主要容器约束?
-
对不起,我的意思是它的 MainController。我放置在主控制器中的元素
-
我应该发布一个演示代码以供参考以编程方式添加约束吗?你可以去看看
-
试试哥们可能是我做错了什么
-
我可以得到你的代码文件吗?还是 Xcode 项目?
标签: ios swift autolayout