blocks|key|191006|text|最后，我找到了一个解决问题的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|191007|可以通过将UITextView子类化，然后覆盖caretRectForPosition:position函数来更改光标高度。例如：|offset|length|style|CODE|191008|-+(CGRect)caretRectForPosition:(UITextPosition+*)position+{
++++CGRect+originalRect+=+[super+caretRectForPosition:position];
++++originalRect.size.height+=+18.0;
++++return+originalRect;
}|code-block|syntax|javascript|191009|文档链接：https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrectforposition|191010|191011|更新:+Swift+2.x或Swift+3.x|191012|参见Nate's+answer。|191013|191014|更新:+Swift+4.x或Swift+5.x|191015|对于Swift+4.x，请使用caretRect(for+position:+UITextPosition)+->+CGRect。|191016|import+UIKit

class+MyTextView:+UITextView+{

++++override+func+caretRect(for+position:+UITextPosition)+->+CGRect+{
++++++++var+superRect+=+super.caretRect(for:+position)
++++++++guard+let+font+=+self.font+else+{+return+superRect+}

++++++++//+"descender"+is+expressed+as+a+negative+value,+
++++++++//+so+to+add+its+height+you+must+subtract+its+value
++++++++superRect.size.height+=+font.pointSize+-+font.descender+
++++++++return+superRect
++++}
}|191017|文档链接：https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrect|191018|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrectforposition|1|https://stackoverflow.com/a/34537839/1467988|2|https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrect^0|0|5|A|N|T|0|0|5|2G|0|0|0|0|2|D|1|0|0|0|F|1D|0|0|5|25|2|0^^$0|@$1|2|3|4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1F|8|@$D|1G|E|1H|F|G]|$D|1I|E|1J|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|1K|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1L|8|@]|9|@$D|1M|E|1N|1|1O]]|A|$]]|$1|O|3|-4|5|6|7|1P|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1R|8|@]|9|@$D|1S|E|1T|1|1U]]|A|$]]|$1|T|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1W|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1X|8|@$D|1Y|E|1Z|F|G]]|9|@]|A|$]]|$1|Y|3|Z|5|J|7|20|8|@]|9|@]|A|$K|L]]|$1|10|3|11|5|6|7|21|8|@]|9|@$D|22|E|23|1|24]]|A|$]]|$1|12|3|-4|5|6|7|25|8|@]|9|@]|A|$]]]|13|$14|$5|15|16|17|A|$18|19]]|1A|$5|15|16|17|A|$18|1B]]|1C|$5|15|16|17|A|$18|1D]]]]

Finally I found a solution that solve my problem.
Changing the cursor height is possible by subclassing the <code>UITextView</code>, then overriding the <code>caretRectForPosition:position</code> function. For example:
<pre><code>- (CGRect)caretRectForPosition:(UITextPosition *)position {
 CGRect originalRect = [super caretRectForPosition:position];
 originalRect.size.height = 18.0;
 return originalRect;
}
</code></pre>
Documentation link: <a href="https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrectforposition" rel="nofollow noreferrer">https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrectforposition</a>
<hr />
<h2>Update: Swift 2.x or Swift 3.x</h2>
See <a href="https://stackoverflow.com/a/34537839/1467988">Nate's answer</a>.
<hr />
<h2>Update: Swift 4.x or Swift 5.x</h2>
For Swift 4.x use <code>caretRect(for position: UITextPosition) -&gt; CGRect</code>.
<pre><code>import UIKit

class MyTextView: UITextView {

 override func caretRect(for position: UITextPosition) -&gt; CGRect {
 var superRect = super.caretRect(for: position)
 guard let font = self.font else { return superRect }

 // &quot;descender&quot; is expressed as a negative value, 
 // so to add its height you must subtract its value
 superRect.size.height = font.pointSize - font.descender 
 return superRect
 }
}
</code></pre>
Documentation link: <a href="https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrect" rel="nofollow noreferrer">https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrect</a>

I'm using <code>NSMutableParagraphStyle</code> in my <code>UITextview</code> for adding linespace between each row text.

When I type something in textview, cursor height is normal. but when I move cursor position to text on the 2nd row (not the last row), cursor height is getting bigger.

<img src="https://i.stack.imgur.com/rDA2u.png" alt="big caret">

What should I do to make cursor height normal in every row of the texts?
 This is code I'm currently using:

<pre><code>NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = 30.;
textView.font = [UIFont fontWithName:@"Helvetica" size:16];
textView.attributedText = [[NSAttributedString alloc] initWithString:@"My Text" attributes:@{NSParagraphStyleAttributeName : paragraphStyle}];
</code></pre>

UITextView lineSpacing cause different cursor height between paragraph lines

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在UITextview中使用NSMutableParagraphStyle在每行文本之间添加行空间。当我在textview中输入内容时，光标高度正常。但是当我将光标移动到第二行(而不是最后一行)上的文本时，光标高度变大了。​​我应该怎么做才能使光标高度在文本的每一行中正常？这是我目前使用的代码：NSMutablePa...

UITextView lineSpacing导致段落行间光标高度不同-腾讯云开发者社区-腾讯云

问UITextView lineSpacing导致段落行间光标高度不同
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