UIButtons in UIScrollView stop working after 3 rows - objective-c

Question

I have a UIScrollView with a list of UIViews within it. Bit like a fancy tableview. One issue I am having is the buttons work ok for the first 3 'rows' in the scrollview, but none of the buttons after this respond when i scroll down. Looks like its working ok for the buttons that show on screen when the view has loaded but anything further down when i scroll will now respond at all...
code from within the uiview repeated within uiscrollview
-(void)addButtons
{
UIButton *visiteWebSite = [UIButton buttonWithType:UIButtonTypeCustom];
[visiteWebSite addTarget:self
action:#selector(visitSite:)
forControlEvents:UIControlEventTouchDown];
[visiteWebSite setTintColor:[UIColor colorWithRed:247 green:143 blue:30 alpha:1.0]];
visiteWebSite.frame = CGRectMake(440.0, 10.0, 120.0, 26.0);
if(![self IsPhone5]) {
visiteWebSite.frame = CGRectMake(350.0, 10.0, 120.0, 26.0);
}
//visiteWebSite.backgroundColor = [UIColor orangeColor]; //[UIColor colorWithRed:247 green:143 blue:30 alpha:1.0];
[visiteWebSite setBackgroundImage:[UIImage imageNamed:#"orangeBG"] forState:UIControlStateNormal];
[visiteWebSite setTitle:#"VISITE WEBSITE" forState:UIControlStateNormal];
visiteWebSite.titleLabel.font = [UIFont fontWithName:#"arial" size:12];
[self addSubview:visiteWebSite];
UIButton *getDirections = [UIButton buttonWithType:UIButtonTypeCustom];
[getDirections addTarget:self
action:#selector(getDirections:)
forControlEvents:UIControlEventTouchDown];
[getDirections setTitle:#"GET DIRECTIONS" forState:UIControlStateNormal];
getDirections.titleLabel.font = [UIFont fontWithName:#"arial" size:12];
getDirections.frame = CGRectMake(440.0, 46.0, 120.0, 26.0);
if(![self IsPhone5]) {
getDirections.frame = CGRectMake(350.0, 46.0, 120.0, 26.0);
}
[getDirections setBackgroundImage:[UIImage imageNamed:#"orangeBG"] forState:UIControlStateNormal];
[self addSubview:getDirections];
}
Code from Parent View containing the UIScrollView
-(void)performSearch
{
[self.loadinglabel removeFromSuperview];
NSString* searchTerm = txtSearch.text;
searchTerm = [searchTerm stringByReplacingOccurrencesOfString:#" " withString:#""];
NSData *urldata = [NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://www.collectioncosmetics.co.uk/storelocatorapi?store=%#",searchTerm]]];
NSString *json = [[NSString alloc] initWithData:urldata encoding:NSUTF8StringEncoding];
SBJsonParser *jsonParser = [[SBJsonParser alloc] init];
NSArray *jsonObjects = [jsonParser objectWithString:json];
float y = 0;
float height = 84;
if([jsonObjects count] < 1) {
UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:#"NO RESULTS" message:#"There are no stores near the postcode you searched" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[alertView show];
[self back:nil];
return;
}
for (int i = 0; i < [jsonObjects count]; i++)
{
NSDictionary *dict = [jsonObjects objectAtIndex:i];
CARStoreResult* result = [[CARStoreResult alloc] initWithFrame:CGRectMake(0, height*i, tv.frame.size.width, height)];
result.name = [dict objectForKey:#"name"];
result.street = [dict objectForKey:#"street"];
result.area = [dict objectForKey:#"area"];
result.county = [dict objectForKey:#"County"];
result.postcode = [dict objectForKey:#"PostCode"];
result.distance = [dict objectForKey:#"distance"];
result.usersPostCode = searchTerm;
result.y = y;
result.num = i;
y = y + height;
[result build];
[tv addSubview:result];
}
[tv setFrame:CGRectMake(tv.frame.origin.x, tv.frame.origin.y, tv.frame.size.width, height*[jsonObjects count])];
[self.scrollView setContentSize:tv.frame.size];
[Flurry logEvent:#"Store Locator"];
}

Answer 1

FIXED!
instead of adding the views to a view within the scrollview i added them just directly to the scrollview. with the scrollview having scrollView.canCancelContentTouches set to NO.
//[tv addSubview:result];
[self.scrollView addSubview:result];
}
//[tv setFrame:CGRectMake(tv.frame.origin.x, tv.frame.origin.y, tv.frame.size.width, height*[jsonObjects count])];
[self.scrollView setContentSize:CGSizeMake(320, height*[jsonObjects count])];
//[self.scrollView setContentSize:tv.frame.size];
[Flurry logEvent:#"Store Locator"];