UITextView lineSpacing cause different cursor height between paragraph lines

Question

I'm using NSMutableParagraphStyle in my UITextview 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.

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

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}]; 

Answer 1

Finally I found a solution that solve my problem.

Changing the cursor height is possible by subclassing the UITextView, then overriding the caretRectForPosition:position function. For example:

- (CGRect)caretRectForPosition:(UITextPosition *)position {     CGRect originalRect = [super caretRectForPosition:position];     originalRect.size.height = 18.0;     return originalRect; } 

Documentation link: https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrectforposition

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Update: Swift 2.x or Swift 3.x

See Nate's answer.

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Update: Swift 4.x or Swift 5.x

For Swift 4.x use caretRect(for position: UITextPosition) -> CGRect.

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     } } 

Documentation link: https://developer.apple.com/documentation/uikit/uitextinput/1614518-caretrect