ios - UIStackView 隐藏/取消隐藏排列的 subview 问题
<p><p>我正在根据在 Segment Control 中点击的 Segment 隐藏和取消隐藏 dropDownView(由文本字段和按钮组成的 UIView)。以下是 View 层次结构:-</p>
<p> <a href="/image/NSK0y.png" rel="noreferrer noopener nofollow"><img src="/image/NSK0y.png" alt="enter image description here"/></a> </p>
<p>以下是隐藏/取消隐藏 dropDownView 的代码:- </p>
<pre><code> private func animateView(view: UIStackView, toHidden hidden: Bool) {
UIView.animate(withDuration: 0.25)
{
let firstView = view.arrangedSubviews
firstView.isHidden = hidden
}
}
func segmentValueChanged(_ sender: UISegmentedControl) {
let segmentSelected = segmentControl.selectedSegmentIndex
switch segmentSelected {
case 0:
animateView(view: mainStackView, toHidden: true)
case 1:
animateView(view: mainStackView, toHidden: true)
case 2:
animateView(view: mainStackView, toHidden: true)
case 3:
animateView(view: mainStackView, toHidden: false)
default:
break
}
}
</code></pre>
<p>我面临的问题是在更改段超过 10-15 次后,上述代码停止工作并且 DropDown View 与段控制重叠,我不知道为什么。任何有助于理解此问题的帮助表示赞赏。</p>
<p>我也试过了<br/>
<强> 1。设置需求布局,<br/>
2.设置NeedsDisplay和<br/>
3.将dropDownView的高度限制优先级从999降低
1000</strong></p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>似乎在 completionClosure 中的附加设置 isHidden 修复了该问题(Swift 5 语法):</p>
<pre><code>private func animateView(view: UIStackView, toHidden hidden: Bool) {
let firstView = view.arrangedSubviews
UIView.animate(withDuration: 0.25) {
firstView.isHidden = hidden
view.layoutIfNeeded()
} completion {
firstView.isHidden = hidden
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - UIStackView 隐藏/取消隐藏排列的 subview 问题,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/50424480/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/50424480/
</a>
</p>
页:
[1]