ios - UICollectionView becomeFirstResponder 错误行为
<p><p>我正在使用带有自定义单元格的 UIColletionView ,其中包含 UITextField。我发现,当 textField 成为第一响应者时,collectionView 会自动滚动,因此键盘不会覆盖已编辑的字段。</p>
<p>问题是,这个功能不能正常工作。它将文本字段滚动到键盘上方的正确位置,但接下来它会向下滚动一点,因为键盘隐藏了部分文本字段。 </p>
<p>我尝试了一个新项目,只有一个简单的 Collection View ,其中只有一个带有文本字段的原型(prototype)单元格,但它也不起作用。</p>
<p>在我的原始项目中,单元格更复杂,第二个滚动条更大,因此整个文本字段都在键盘下方。</p>
<p>这是 Collection View 中的错误还是我做错了什么? (在简单的项目中几乎不会有任何问题......</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>至于我的示例项目。</p>
<p>UICollectionViewController</p>
<pre><code>import UIKit
private let reuseIdentifier = "Cell"
class CollectionCollectionViewController: UICollectionViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using .
// Pass the selected object to the new view controller.
}
*/
// MARK: UICollectionViewDataSource
override func numberOfSections(in collectionView: UICollectionView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of items
return 50
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as? CollectionViewCell
cell?.field.backgroundColor = .red
return cell ?? UICollectionViewCell()
}
}
</code></pre>
<p>UICollectionViewCell</p>
<pre><code>import UIKit
class CollectionViewCell: UICollectionViewCell {
@IBOutlet var field: UITextField!
}
</code></pre>
<p> <a href="/image/96JrM.png" rel="noreferrer noopener nofollow"><img src="/image/96JrM.png" alt="enter image description here"/></a> </p></p>
<p style="font-size: 20px;">关于ios - UICollectionView becomeFirstResponder 错误行为,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/45739644/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/45739644/
</a>
</p>
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