ios - UICollectionViewCell 复选标记返回 nil
<p><p>我尝试关注 <a href="https://stackoverflow.com/a/42426809/8766540" rel="noreferrer noopener nofollow">this</a>
但是当我做 <code>cell.checkmarkView.checked = true</code> 它返回 nil 所以一切都崩溃了。
这是我的 MyCollectionViewCell:</p>
<pre><code>class MyCollectionViewCell: UICollectionViewCell {
@IBOutlet weak var myLabel: UILabel!
var checkmarkView: SSCheckMark!
override init(frame: CGRect) {
super.init(frame: frame)
checkmarkView = SSCheckMark(frame: CGRect(x: frame.width-40, y: 10, width: 35, height: 35))
checkmarkView.backgroundColor = UIColor.white
contentView.addSubview(checkmarkView)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
//fatalError("init(coder:) has not been implemented")
}}
</code></pre>
<p>你能帮我理解什么是错的吗？</p>
<p>我的collectionView cellforitemat...</p>
<pre><code> func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! MyCollectionViewCell
cell.myLabel.text = self.listCivics()
cell.layer.borderWidth = 1
cell.checkmarkView.checked = true
return cell
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您的单元格是从 Storyboard 加载的。因此， <code>init(frame:)</code> 不会被调用。你也应该在 <code>init(coder:)</code> 中初始化你的复选标记。</p>
<pre><code>required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let contentBounds = contentView.bounds
checkmarkView = SSCheckMark(frame: CGRect(x: contentBounds.width - 40, y: 10, width: 35, height: 35))
checkmarkView.backgroundColor = UIColor.white
// adapt to changes in cell size
checkmarkView.autoresizingMask = [ .flexibleLeftMargin, .flexibleBottomMargin ]
contentView.addSubview(checkmarkView)
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - UICollectionViewCell 复选标记返回 nil，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/46714486/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/46714486/
</a>
</p>
页:
[1]