xcode 宽度和水平位置不明确
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Width and Horizontal Position Are Ambiguous
提问by Glyphs
it seems I have created a simple Image view with the following constraints:
似乎我创建了一个具有以下约束的简单图像视图：
Align Center X to: Superview
将中心 X 对齐到：超级视图
Align Center Y to: Superview
将 Y 中心对齐到：超级视图
Top Space to: Top Layout Guide
顶部空间：顶部布局指南
Bottom Space to: Bottom Layout Guide
底部空间到：底部布局指南
And I have the Width and Horizontal Position Are Ambiguousmessage. I am trying to correct it, but I am not sure about what is happening in the first place.
我有Width 和 Horizontal Position Are Ambiguous消息。我正在尝试纠正它，但我不确定首先发生了什么。
Do you have an idea?
你有想法吗？
回答by konrad.bajtyngier
You need to add the same constraint for left and right as you did for top and bottom.
您需要为左侧和右侧添加与顶部和底部相同的约束。
Or set fixed width.
或者设置固定宽度。
回答by rushisangani
Remove Top Space to: Top Layout Guideand Bottom Space to: Bottom Layout Guideconstraints, Set Image's Width and Heightinstead or (Width + Aspect ratio). Because every view needs x,y, height, width to render itself.
移除Top Space to: Top Layout Guide和Bottom Space to: Bottom Layout Guide约束，改为设置图像的宽度和高度或(Width + Aspect ratio)。因为每个视图都需要 x,y, height, width 来渲染自己。
So You've already set X and Y using Align Center X to: Superviewand Align Center Y to: Superview. So it needs specific width and height now.
所以你用已设置的X和Y居中X到：上海华和 居中y以：上海华。所以它现在需要特定的宽度和高度。
回答by Devanshu Saini
As you have told for constrainst: Align Center X to: Superview
正如您所说的约束：将中心 X 对齐到：超级视图
Align Center Y to: Superview
将 Y 中心对齐到：超级视图
Top Space to: Top Layout Guide
顶部空间：顶部布局指南
Bottom Space to: Bottom Layout Guide
底部空间到：底部布局指南
The left option is of width Consider that any view which is placed behaves like expanding to and fro, we have to stablise it by putting constraints, your missing constraints for setting width (either from leading and trailing or from width) is making this issue
左边的选项是宽度考虑到放置的任何视图的行为都像来回扩展，我们必须通过放置约束来稳定它，设置宽度（从前导和尾随或从宽度）缺少的约束正在导致这个问题
回答by sundersparks
Go to Editor > Resolve Autolayout issue > Add Missing Constraint
去 Editor > Resolve Autolayout issue > Add Missing Constraint
Then the get the solution on the error page, what needs to be updated for example refer to the image where the heightneeds to be modified to 21from 20
然后在错误页面获取解决方案，需要更新的地方例如参考height需要修改为21的图片20
