UIScrollView programmatically add buttons and scroll - ios

Question

I'm new to ios and Objective-C. Please be a little bit patient with me.
THe functionality in my app, which I'm trying to develop, is a small scrolling toolbar, which contains several buttons, state toggling buttons. Also there is another button above the toolbar which slides in and out the toolbar. The second functionality I achieved successfully, using a view for the whole setup and when the slide button touch up event animates the whole view up and down.
For the scrollview, I wanted to add buttons programmatically, hence I drew an outlet to the class and tried adding a self created button as a subview. However I cannot see the button. Nor can I observe the scrollview sliding.
THe following is the way I'm adding the button:
Also, my total view for the above functionality is very less in size than the total view controller
UIButton *button = [[UIButton alloc] init];
button.titleLabel.text = #"hello";
[_scrollTop setContentSize:self.view.frame.size];
[_scrollTop addSubview:button];
The two images down, I hope, should help you understand the functionality I'm trying to develop. If anybody is aware of existence of similar functionality, please do direct me.
Edit: Code totally is
//
// HCILocationViewController.m
// app2
//
// Created by Ravi Vooda on 13/03/13.
// Copyright (c) 2013 housing.co.in. All rights reserved.
//
#import "HCILocationViewController.h"
#import "HCIAnnotationViewController.h"
#interface HCILocationViewController ()
#property int widMap;
#property BOOL showExploreOptions;
#end
#implementation HCILocationViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
_mapLocationView.delegate = self;
MKPointAnnotation *annotation = [[HCIAnnotationViewController alloc]
initwithHouse:[self singleHome]];
[_mapLocationView addAnnotation:annotation];
_widMap = 10000;
_showExploreOptions = NO;
/*
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);//give values whatever you want.
[_scrollTop addSubview:button];
*/
[self addButtonsToScrollView];
}
- (void)addButtonsToScrollView
{
NSInteger buttonCount = 4;
CGRect buttonFrame = CGRectMake(5.0f, 5.0f, self.scrollTop.frame.size.width-10.0f, 40.0f);
for (int index = 0; index <buttonCount; index++) {
UIButton *button = [[UIButton alloc]initWithFrame:buttonFrame];
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[button setTag:index+1];
NSString *title = [NSString stringWithFormat:#"Button %d",index+1];
[button setTitle:title forState:UIControlStateNormal];
[self.scrollTop addSubview:button];
buttonFrame.origin.y+=buttonFrame.size.height+5.0f;
}
CGSize contentSize = self.scrollTop.frame.size;
contentSize.height = buttonFrame.origin.y;
[self.scrollTop setContentSize:contentSize];
}
- (void)buttonPressed:(UIButton *)button
{
NSLog(#"button pressed");
switch (button.tag) {
case 1:
//Do something
break;
default:
break;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(MKAnnotationView*) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
NSString *identifier = #"currDetailsIdentifier";
MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[_mapLocationView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annotationView == nil) {
annotationView = [[MKPinAnnotationView alloc]
initWithAnnotation:annotation
reuseIdentifier:identifier];
} else {
annotationView.annotation = annotation;
}
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
return annotationView;
}
-(void) mapViewDidFinishLoadingMap:(MKMapView *)mapView
{
MKMapRect zoomRect = MKMapRectNull;
for (id <MKAnnotation> annotation in mapView.annotations) {
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(
annotationPoint.x - (_widMap / 2),
annotationPoint.y - (_widMap/2),
_widMap,
_widMap);
if (MKMapRectIsNull(zoomRect)) {
zoomRect = pointRect;
} else {
zoomRect = MKMapRectUnion(zoomRect, pointRect);
}
}
[mapView setVisibleMapRect:zoomRect animated:YES];
}
-(void) setMyHouse:(NSDictionary *)singleHouse {
self.singleHome = singleHouse;
}
- (IBAction)toggleExploreOptionsView:(UIButton *)sender {
sender.selected = !sender.selected;
if (_showExploreOptions){
NSLog(#"Close Options");
[UIView animateWithDuration:0.2 animations:^{
_exploreView.frame = CGRectMake(_exploreView.frame.origin.x, _exploreView.frame.origin.y + _exploreOptionsView.frame.size.height, _exploreView.frame.size.width, _exploreView.frame.size.height + _exploreOptionsView.frame.size.height);
}];
}
else {
NSLog(#"Open Options");
[UIView animateWithDuration:0.2 animations:^{
_exploreView.frame = CGRectMake(_exploreView.frame.origin.x, _exploreView.frame.origin.y - _exploreOptionsView.frame.size.height, _exploreView.frame.size.width, _exploreView.frame.size.height - _exploreOptionsView.frame.size.height);
}];
}
_showExploreOptions = !_showExploreOptions;
}
#end

Answer 1

If I understood your question correctly you need to have view which should show up and collapse on a button click event. When the view is shown, it should have a scrollable list of buttons. And you are asking help to show many buttons to scrollView.
Demo Source Code
- (void)addButtonsToScrollView
{
NSInteger buttonCount = 5;
CGRect buttonFrame = CGRectMake(5.0f, 5.0f, self.scrollTop.frame.size.width-10.0f, 40.0f);
for (int index = 0; index <buttonCount; index++) {
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setFrame:buttonFrame];
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[button setTag:index+1];
NSString *title = [NSString stringWithFormat:#"Button %d",index+1];
[button setTitle:title forState:UIControlStateNormal];
[self.scrollTop addSubview:button];
buttonFrame.origin.y+=buttonFrame.size.height+5.0f;
}
CGSize contentSize = self.scrollTop.frame.size;
contentSize.height = buttonFrame.origin.y;
[self.scrollTop setContentSize:contentSize];
}
- (void)buttonPressed:(UIButton *)button
{
switch (button.tag) {
case 1:
//Do something
break;
default:
break;
}
}