ios - UITextField 不会自动调整宽度以适应内容，直到 resignFirstResponder 被调用？
<p><p>我不确定为什么会这样，但基本上我有一个静态单元格，它由 <code>UITextField</code> 组成。 <code>inputView</code> 是一个 <code>UIPickerView</code> 并且它的 <code>inputAccessoryType</code> 是一个 <code>UIToolBar</code>。</p>
<p>我是这样创建的:</p>
<pre><code>var repeat_ARRAY: = []
override func viewDidLoad()
{
super.viewDidLoad()
repeat_ARRAY.append("No Cycle")
repeat_ARRAY.append("Semi-Monthly")
toolBar.barStyle = UIBarStyle.default
toolBar.isTranslucent = true
toolBar.sizeToFit()
let doneButton = UIBarButtonItem(title: "Done", style: .done, target: self, action: #selector(ViewController.dismissPicker(_:) ) )
let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)
toolBar.setItems(, animated: false)
toolBar.isUserInteractionEnabled = true
createCell()
}
func numberOfComponents(in pickerView: UIPickerView) -> Int
{
return 1
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
{
return repeat_ARRAY
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
{
textField.text = repeat_ARRAY
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
{
return repeat_ARRAY.count
}
func dismissPicker(_ sender: UIBarButtonItem)
{
textField.resignFirstResponder()
}
func createCell()
{
textField.text = "No Cycle"
textField.delegate = self
let pickerView: UIPickerView = UIPickerView()
pickerView.delegate = self
pickerView.dataSource = self
textField.inputView = pickerView
textField.inputAccessoryView = toolBar
}
</code></pre>
<p>这就是它在 Storyboard中的设置方式:</p>
<p> <a href="/image/pP51c.png" rel="noreferrer noopener nofollow"><img src="/image/pP51c.png" alt="enter image description here"/></a> </p>
<p>最初加载 ViewController 时，<code>textField.text</code> 的值为 <strong>No Cycle</strong>，非常适合。但是，当我滚动 <code>UIPickerView</code> 以选择第二行时，即 <strong>Semi-Monthly</strong>，文本会像这样被截断:</p>
<p> <a href="/image/Y7Qrk.png" rel="noreferrer noopener nofollow"><img src="/image/Y7Qrk.png" alt="enter image description here"/></a> </p>
<p>直到我点击 <strong>Done</strong> <code>UIBarButtonItem</code> 调用 <code>textField.resignFirstResponder</code> 才知道 <code>textField</code> 的宽度自动扩展以适应字符串 <strong>Semi-Monthly</strong> 的内容，如下所示:
<a href="/image/gVplX.png" rel="noreferrer noopener nofollow"><img src="/image/gVplX.png" alt="enter image description here"/></a> </p>
<p>我不太明白为什么会这样？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>为您的文本字段设置“前导、尾随、顶部和固定高度约束”，您的问题将得到解决!如果你不能同时设置前导和尾随，那么你应该设置固定宽度。 </p></p>
<p style="font-size: 20px;">关于ios - UITextField 不会自动调整宽度以适应内容，直到 resignFirstResponder 被调用？，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/43284605/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/43284605/
</a>
</p>
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