uitextview scrollRangeToVisible scroll from top to bottom everytime

Question

I have two uitextview in storyboard. What I need is when the user type something in one textview should show the exact same data in another textview, also when the text is below the textview area it should automatically scroll up showing the last line. This is my code in uitextview delegate

<code>
-(void)textViewDidChange:(UITextView *)textView
{
    self.textview2.text = textview.text;
    NSRange selection = self.textview2.selectedRange;

        [self.textview2 scrollRangeToVisible:NSMakeRange([self.textview2.text length], 0)];];

}
</code>

This code works but the problem is everytime it scrolls from top to bottom which irritates user. Any solution will be appreciated?

Vijay-Apple-Dev.blogspot.com · Accepted Answer · 2014-12-15 08:54:25Z

1

Try this dude

-(void)textViewDidChange:(UITextView *)textView
{

    self.textview2.text = textview.text;

    [self.textview2 scrollRectToVisible:CGRectMake(0, self.textview2.contentSize.height, self.textview2.contentSize.width, CGFLOAT_MAX)
                               animated:NO];
}

answered Dec 15, 2014 at 8:54

Vijay-Apple-Dev.blogspot.com

25.7k7 gold badges69 silver badges76 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Onik IV · Accepted Answer · 2014-12-22 08:42:00Z

0

Both textView must have the viewController as delegate:

     self.textView1.delegate = self;
     self.textview2.delegate = self;

Then implement this methods in this way:

 -(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if ([scrollView isEqual:self.textview2])
{
     [self.textview2 scrollRangeToVisible:NSMakeRange([self.textview2.text length], 0)];

}
}

-(void)textViewDidChange:(UITextView *)textView
  {

 if ([textView isEqual:self.textView1])
 {


self.textview2.text = textView.text;

[self.textview2 scrollRangeToVisible:NSMakeRange([self.textview2.text length], 0)];
}

}

The problem is the way textView work, when you make this: self.textview2.text = textView.text; the text in the textView is first point to nil, (no text, contentOffSet point to 0.0), then the new text is pointing. The content change between zero and a big content (in fact bigger and bigger). the textContainer and textStorage of the text view are in charge of this work...

edited Dec 22, 2014 at 8:42

answered Dec 15, 2014 at 8:43

Onik IV

5,0452 gold badges21 silver badges24 bronze badges

19 Comments

user1495387 Over a year ago

thank you for the help, but this is not my requirement. I need another textview to be scroll bottom when the user type and press return key in the first textview

Onik IV Over a year ago

@user1495387 Try this answer, please.

user1495387 Over a year ago

this is some how the same way i did, and i told you it scroll from top to bottom everytime i enter return key

Onik IV Over a year ago

What do you want to happen, when you press the return key, and how do you do the textView end editing ?

Onik IV Over a year ago

@user1495387 another question, both textView have the same dimensions and fonts ?

|

Collectives™ on Stack Overflow

uitextview scrollRangeToVisible scroll from top to bottom everytime

2 Answers 2

Comments

19 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

19 Comments

Your Answer

Sign up or log in

Post as a guest

Related