UITextView not showing scroll bars

I have made UITextView programmatically but it is not showing the vertical and horizontal scroll bars. The code I have used is as follows,

UITextView *txtView = [[UITextView alloc] initWithFrame:CGRectMake(origin, imgFrame.size.heigh开发者_高级运维t + 10, mScrollView.frame.size.width, 300)];
txtView.font = [UIFont fontWithName:@"HelveticaNeue" size:12];
txtView.textColor = [UIColor blackColor];
txtView.textAlignment = UITextAlignmentLeft;
txtView.editable = NO;
txtView.scrollEnabled = YES;
txtView.backgroundColor = [UIColor clearColor];
[txtView setAutoresizingMask:UIViewAutoresizingFlexibleWidth]; 
//[txtView flashScrollIndicators];
[txtView setText:[mDescArr objectAtIndex:index]];
[mScrollView  addSubview:txtView];
[txtView release];

How can I make the scrollbars show?

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I think there is no regular way to make them always visible (On Purpose!).

The BOOL txtView.showsVerticalScrollIndicator=TRUE/showsHorizontalScrollIndicator only shows the bar if the scrollView is active and hides it after some milliseconds inactivity.

If you comment [txtView flashScrollIndicators]; out then it only shows it once, to show the User that there is a possibility to scroll.

I think one (ugly) way to make it possible is, to call flashScrollIndicators more often, but this is no proper solution.

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Do you have any text in it? It will only show the scroll bars if the text is bigger than the size of the view.

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As bizarre as it may sound, do you ever collect and remove/edit subviews of your UITextView? When calling subviews from a UITextView (or UIScrollView), it will also return its scroll bars.