ios - 如何在 UIStackView 中堆叠自定义 View
<p><p>注意:我是使用 iOS UI 的新手。</p>
<p>我想创建一个自定义 View ，在里面堆叠自定义 View 。</p>
<p>所以我创建了<strong>自定义 UIStackView</strong> </p>
<pre><code>class CustomStackView: UIStackView {
func addItem(color:UIColor){
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: "RowView", bundle: bundle)
let rowView = RowView();
let view = nib.instantiate(withOwner: rowView, options: nil).first as! UIView
rowView.addSubview(view)
rowView.view.backgroundColor = color;
addArrangedSubview(rowView)
}
}
class RowView :UIView{
@IBOutlet var view: UIView!
override public var intrinsicContentSize: CGSize {
return CGSize(width: view.frame.width,height:view.frame.height)
}
}
</code></pre>
<p>在 <code>RowView.xib</code> 我创建了一个简单的布局用于测试:</p>
<pre><code>Simulated Metrics = Freeform
Height = 100
</code></pre>
<p> <a href="/image/RrBfz.png" rel="noreferrer noopener nofollow"><img src="/image/RrBfz.png" alt="enter image description here"/></a> </p>
<p>还有 ViewController.swift:</p>
<pre><code>class ViewController: UIViewController {
@IBOutlet weak var customStackView: CustomStackView!
@IBOutlet weak var constraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
customStackView.addItem(color: UIColor.red)
customStackView.addItem(color: UIColor.blue)
customStackView.addItem(color: UIColor.green)
}
@IBAction func click(_ sender: Any) {
constraint.constant = -customStackView.frame.height
UIView.animate(withDuration: 4, animations: {
self.view.layoutIfNeeded();
},completion:nil)
}
}
</code></pre>
<p><strong>结果:</strong></p>
<p> <a href="/image/xrhjWm.png" rel="noreferrer noopener nofollow"><img src="/image/xrhjWm.png" alt="enter image description here"/></a> </p>
<p>第一项和第二项显示正确，但第三项高于预期。</p>
<p>此外，如果我单击按钮(应该隐藏 Stackview)，请保持“额外”高度可见:</p>
<p> <a href="/image/aUbrbm.png" rel="noreferrer noopener nofollow"><img src="/image/aUbrbm.png" alt="enter image description here"/></a> </p>
<p>我该如何解决这个问题？</p>
<p>编辑:尝试了添加尾随 View 的@KristijanDelivuk 解决方案。并没有奏效。将青色添加到 View 中我得到了这个结果:</p>
<pre><code>override func viewDidLoad() {
super.viewDidLoad()
customStackView.addItem(color: UIColor.red)
customStackView.addItem(color: UIColor.blue)
customStackView.addItem(color: UIColor.green)
let view = UIView();
view.heightAnchor.constraint(equalToConstant: 50).isActive = true;
view.backgroundColor = UIColor.cyan;
customStackView.addArrangedSubview(view)
}
</code></pre>
<p> <a href="/image/eLYr9m.png" rel="noreferrer noopener nofollow"><img src="/image/eLYr9m.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以尝试添加一个空的 UIView 作为 UIStackView 的最后一个元素:</p>
<p>所以你的层次结构应该是这样的:</p>
<pre><code>- STACKVIEW
-- 1ST ADDED CUSTOM VIEW
-- 2ND ADDED CUSTOM VIEW
-- 3RD ADDED CUSTOM VIEW
-- EMPTY UIVIEW
</code></pre>
<p>Empty UIView 将从第三个 View 中占用所有未分配的空间，并且所有空间都应该正确显示。 </p>
<p>对于隐藏/显示 stackview 后重新定位按钮，您可以创建例如“顶部约束”，然后点击将顶部约束高度更改为 (-) stackview.height 或 (+) stackview.height - 这应该没有任何问题.</p></p>
<p style="font-size: 20px;">关于ios - 如何在 UIStackView 中堆叠自定义 View ，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/44823982/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/44823982/
</a>
</p>
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