ios - 从 textView 中的字符索引获取单词(iOS)
<p><p>在点击 UITextVIew 时，我试图获取点击发生的单词(使用放置在 UITextView 中的 UITapGestureRecognizer)。我能够抓取所选字符的索引，但我没有成功抓取完整的单词，它似乎只在我点击第一个字母时才有效。 </p>
<pre><code>func textTapped(_ tapGestureRecognizer: UITapGestureRecognizer){
if let textView = textTapGestureRecognizer?.view as? UITextView {
let layoutManager = textView.layoutManager
var location: CGPoint = textTapGestureRecognizer!.location(in: textView)
location.x -= textView.textContainerInset.left
location.y -= textView.textContainerInset.top
let characterIndex = layoutManager.characterIndex(for: location, in: textView.textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
if characterIndex < textView.textStorage.length {
// print the character index successfully
print("character index: \(characterIndex)")
// print the character at the index successfully
let myRange = NSRange(location: characterIndex, length: 1)
let substring = (textView.attributedText.string as NSString).substring(with: myRange)
print("character at index: \(substring)")
let tapPosition: UITextPosition? = textView.closestPosition(to: location)
//fetch the word at this position (or nil, if not available)
if let textRange = textView.tokenizer.rangeEnclosingPosition(tapPosition!, with: .word, inDirection: 1) {
if let tappedWord = textView.text(in: textRange) {
print("selected word :\(tappedWord)")
//This only prints when I seem to tap the first letter of word.
}
}
}
}
}
</code></pre>
<p>我总是能够打印出字符索引和被点击的字符，但是，捕获单词是个问题。如何每次都从带有字符索引的 textView 中获取整个单词？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>问题显然源于我在获取位置后设置的 .x 和 .y 值。我所要做的就是删除这些行:</p>
<pre><code>location.x -= textView.textContainerInset.left
location.y -= textView.textContainerInset.top
</code></pre></p>
<p style="font-size: 20px;">关于ios - 从 textView 中的字符索引获取单词(iOS)，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/41860197/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/41860197/
</a>
</p>
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