You shouldn't put lbAnimation inside viewAnimation. And need some calculate duration of animation time.
- (IBAction)startAction:(id)sender { NSString * htmlString = @"<html>" " <head>" " <style type='text/css'>" " body { font: 16pt 'Gill Sans'; color: #1a004b; }" " i { color: #822; }" " </style>" " </head>" " <body>Here is some <i>formatting!</i> <a href='#'><font color='green'>Google</font></a><font color='red'> example text</font><a href='#'>YouTube</a><b> bold</b> and <i>italic</i></body>" "</html>"; NSError *err = nil; NSAttributedString * attrStr = [[NSAttributedString alloc] initWithData: [htmlString dataUsingEncoding:NSUTF8StringEncoding] options: @{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes: nil error: &err]; _viewAnimation.frame = CGRectMake(self.view.frame.size.width, _viewAnimation.frame.origin.y, _viewAnimation.frame.size.width, _viewAnimation.frame.size.height); _viewAnimation.hidden = NO; _lbAnimation.hidden = YES; CGRect rect = [attrStr boundingRectWithSize:CGSizeMake(FLT_MAX, _lbAnimation.frame.size.height) options:NSStringDrawingUsesLineFragmentOrigin context:nil]; [UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{ _viewAnimation.frame=CGRectMake(0, _viewAnimation.frame.origin.y, _viewAnimation.frame.size.width, _viewAnimation.frame.size.height); } completion:^(BOOL finished) { _lbAnimation.hidden = NO; _lbAnimation.attributedText = attrStr; _lbAnimation.frame = CGRectMake(self.view.frame.size.width, _lbAnimation.frame.origin.y, rect.size.width, _viewAnimation.frame.size.height); CGFloat duration = 6; CGFloat ratio = _viewAnimation.frame.size.width / (rect.size.width + _viewAnimation.frame.size.width); [UIView animateWithDuration:duration * ratio delay:duration * (1-ratio) + 0.1f options:UIViewAnimationOptionCurveLinear animations:^{ _viewAnimation.frame = CGRectMake(_viewAnimation.frame.origin.x, _viewAnimation.frame.origin.y, 0, _viewAnimation.frame.size.height); } completion:^(BOOL finished) { _viewAnimation.hidden = YES; }]; [UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveLinear animations:^{ _lbAnimation.frame=CGRectMake(-rect.size.width, _lbAnimation.frame.origin.y, rect.size.width, _lbAnimation.frame.size.height); } completion:^(BOOL finished) { }]; }]; }
You can check my demo.
