问题描述
AutoLayout添加了一个NSAutoresizingMaskLayoutConstraint，它会引起冲突，目前尚不清楚在何处以及如何发生冲突.
AutoLayout is adding a NSAutoresizingMaskLayoutConstraint that causes a conflict, and it's unclear where and how.
问题是:293的高度从哪里来?
The question is: where does the height of 293 come from?
UIView层次结构:
UIView hierarchy:
自动版式日志已编号. Xcode标签未显示在AutoLayout日志中.
The AutoLayout log has been numbered. Xcode labels didn't show up in the AutoLayout logs.
第1行似乎很麻烦.根据约束，看来这是Post View Cell，这是自定义的UICollectionViewCell.
Line 1 seems to be the trouble. Based on the constraints, it seems this is Post View Cell, which is a custom UICollectionViewCell.
但是sizeForItemAt UICollectionViewDelegate函数没有返回该值.如果您将返回值硬编码为CGSize(width: 300, height: 100)之类的值，则293仍会出现在日志中.
Yet the sizeForItemAt UICollectionViewDelegate function does not return this value. If you hard code the return value to something like CGSize(width: 300, height: 100), 293 still appears in the log.
那么293是哪里来的?
So where is 293 coming from?
第2行是代码中设置的约束，这是正确的值.此视图应为Attachment View.
Line 2 is a constraint set in code, and this is the right value. This view should be Attachment View.
第3行和第4引用Post Content View，它是UIStackView.
Lines 3 & 4 refer to Post Content View, which is a UIStackView.
第5行是Text View.
第6行是Attachment View.
第7行是UIStackView(Post Content View)设置的间距.
Line 7 is the spacing set by the UIStackView (Post Content View).
1. "<NSAutoresizingMaskLayoutConstraint:0x600002a47610 h=--& v=--& UIView:0x7facf0e126b0.height == 293 (active)>",
2. "<NSLayoutConstraint:0x600002a79a40 UIView:0x7facf0e07110.height == 280 (active)>",
3. "<NSLayoutConstraint:0x600002a785a0 V:[UIStackView:0x7facf0e12890]-(10)-| (active, names: '|':UIView:0x7facf0e126b0 )>",
4. "<NSLayoutConstraint:0x600002a79180 V:|-(10)-[UIStackView:0x7facf0e12890] (active, names: '|':UIView:0x7facf0e126b0 )>",
5. "<NSLayoutConstraint:0x600002a7cff0 'UISV-canvas-connection' UIStackView:0x7facf0e12890.top == UITextView:0x7facf283a600'hi'.top (active)>",
6. "<NSLayoutConstraint:0x600002a7cf00 'UISV-canvas-connection' V:[UIView:0x7facf0e07110]-(0)-| (active, names: '|':UIStackView:0x7facf0e12890 )>",
7. "<NSLayoutConstraint:0x600002a7d270 'UISV-spacing' V:[UITextView:0x7facf283a600'hi']-(5)-[UIView:0x7facf0e07110] (active)>"
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x600002a79a40 UIView:0x7facf0e07110.height == 280 (active)>
推荐答案
只要您拥有translatesAutoresizingMaskIntoConstraints为true的视图，NSAutoresizingMaskLayoutConstraint就会出现(不幸的是，当您在其中创建视图时，这是默认设置)代码).确保不是这种情况.
An NSAutoresizingMaskLayoutConstraint can arise any time you have a view for which translatesAutoresizingMaskIntoConstraints is true (which, unfortunately, is the default when you create a view in code). Make sure that that's not the case.
这篇关于由AutoLayout系统设置的NSAutoresizingMaskLayoutConstraint引入的神秘值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！