swift - UIStackView 内的项目溢出

Question

我以UIStackView编程方式创建了一个内部放置UITextView的 s。
当UITextViews 的数量超过 5 时，框开始溢出屏幕。这是情况的屏幕截图：

这是代码：

let stackview = UIStackView(arrangedSubviews: letterBoxes)
stackview.axis = .horizontal
stackview.spacing = 10
stackview.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(stackview)
stackview.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
stackview.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true

我错过了什么？谢谢你

标签： swiftuistackview

Answer 1

也像这样添加.leading和.trailing约束

view.addConstraint(NSLayoutConstraint(item: stackview, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1, constant: 0))            
view.addConstraint(NSLayoutConstraint(item: stackview, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1, constant: 0))

所以完整的代码如下所示：

let stackview = UIStackView(arrangedSubviews: letterBoxes)
stackview.axis = .horizontal
stackview.spacing = 10
stackview.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(stackview)
stackview.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
stackview.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true

view.addConstraint(NSLayoutConstraint(item: stackview, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1, constant: 0))
view.addConstraint(NSLayoutConstraint(item: stackview, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1, constant: 0))