How to Read Number of lines in UITextView

I am using UITextView In my View , I have requirement to count number of line contained by textview am using following function to read '\n' . However this works only when return key is pressed from keyboard , but in case line warapper (when i type continuous characters i wont get new line char ) . How do i read new char when line is changed without hitting return key ?? Anybody has nay idea how to .. please share it .. I am follwing this link Link

- (BOOL)textView:(UITextV开发者_高级运维iew *)textView shouldChangeTextInRange:(NSRange)range 
 replacementText:(NSString *)text
{
    // Any new character added is passed in as the "text" parameter
    if ([text isEqualToString:@"\n"]) {
        // Be sure to test for equality using the "isEqualToString" message
        [textView resignFirstResponder];

        // Return NO so that the final '\n' character doesn't get added
        return NO;
    }
    // For any other character return YES so that the text gets added to the view
    return YES;
}

In iOS 7, it should exactly be:

float rows = (textView.contentSize.height - textView.textContainerInset.top - textView.textContainerInset.bottom) / textView.font.lineHeight;

You can look at the contentSize property of your UITextView to get the height of the text in pixels, and divide by the line height spacing of the UITextView's font to get the number of text lines in the total UIScrollView (on and off screen), including both wrapped and line broken text.

extension NSLayoutManager {
    var numberOfLines: Int {
        guard let textStorage = textStorage else { return 0 }

        var count = 0
        enumerateLineFragments(forGlyphRange: NSMakeRange(0, numberOfGlyphs)) { _, _, _, _, _ in
            count += 1
        }
        return count
    }
}

Get number of lines in textView:

let numberOfLines = textView.layoutManager.numberOfLines

Just for reference...

Another way you can get the number of lines and also the content, is splitting the lines in an array using the same method mentioned on the answer edit by BoltClock.

NSArray *rows = [textView.text componentsSeparatedByString:@"\n"];

You can iterate through the array to get the content of each line and you can use the [rows count] to get the exact number of rows.

One thing to keep in mind is that empty lines will be counted as well.