CGRect r = CGRectMake(0, myUIScrollView.contentSize.height - 1, 1, 1);
[myUIScrollView scrollRectToVisible:r animated:YES];

CGRect rectBottom = CGRectZero;
rectBottom.size = myUIScrollView.frame.size;
rectBottom.origin.y = myUIScrollView.contentSize.height - rectBottom.size.height;
rectBottom.origin.x = 0;

[myUIScrollView scrollRectToVisible:rectBottom animated:YES];

#import "ViewController.h"

//#define WORKAROUND

@interface ViewController ()
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) UITextView *textView;
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTap)]];

    self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 240)];
    self.scrollView.contentSize = CGSizeMake(320, 400);
    self.scrollView.backgroundColor = [UIColor lightGrayColor];
    [self.view addSubview:self.scrollView];

#ifdef WORKAROUND
    UIScrollView* dummyScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(20, 280, 280, 100)];
    self.textView = [[UITextView alloc] initWithFrame:dummyScrollView.bounds];
    [dummyScrollView addSubview:self.textView];
    [self.scrollView addSubview:dummyScrollView];
#else
    self.textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 280, 280, 100)];
    [self.scrollView addSubview:self.textView];
#endif

    self.textView.backgroundColor = [UIColor grayColor];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)viewTap
{
    if (self.textView.isFirstResponder) {
        [self.textView resignFirstResponder];
    }
    else {
        [self.textView becomeFirstResponder];
    }
}

- (void)keyboardWasShown:(NSNotification*)aNotification
{
#ifdef WORKAROUND
    [self.scrollView scrollRectToVisible:CGRectInset(self.textView.superview.frame, 0, -10) animated:YES];
#else
    [self.scrollView scrollRectToVisible:CGRectInset(self.textView.frame, 0, -10) animated:YES];
#endif
}

@end