You'll need to create a UIScrollView wrapper and set the proper contentSize:
m_coreText.frame=CGRectMake(0, 0, self.view.bounds.size.width, [m_coreText sizeThatFits:CGSizeMake(self.view.bounds.size.width, MAXFLOAT)].height);
UIScrollView* scroll=[[UIScrollView alloc] initWithFrame:self.view.bounds];
scroll.autoresizingMask=UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
scroll.contentSize=m_coreText.frame.size;
[scroll addSubview:m_coreText];
[self.view addSubview:scroll];