Create Grid of UIVews in NSArray - objective-c

Question

What I am trying to do is align views in a grid that are in an array. I have created the views and the array.
for (int i = 0; i < [directoryContents count]; i++){
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0,0,100,120)];
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, 100, 100);
button.accessibilityIdentifier = [directoryContents objectAtIndex:i];
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, 100, 20)];
label.textAlignment = NSTextAlignmentCenter;
label.text = [directoryContents objectAtIndex:i];
[containerView addSubview:button];
[containerView addSubview:label];
[self.view addSubview:containerView];
[_containerViewArray addObject:containerView];
}
[self layoutViews:_containerViewArray inView:self.view];
What I have working is aligning them next to each other the problem I am having is I need to have them wrap down instead of going off the edge. What I am doing to algin them is this
- (void)layoutViews:(NSArray *)views inView:(UIView *)contentView
{
NSInteger overallWidth = 0;
for ( UIView *view in views ) {
overallWidth += view.frame.size.width;
}
CGSize contentSize = contentView.frame.size;
CGFloat startOffset = (contentSize.height - overallWidth)/2.0;
CGFloat offset = startOffset;
for ( UIView *view in views ) {
CGRect frame = view.frame;
frame.origin.x = offset;
view.frame = frame;
offset += view.frame.size.width;
}
}

Answer 1

If we assumed that we have an array of sections (your views) and you need to layout 3 item per row the view has size 98*98 and spacing 6.5px horizontally and 8px Vertically
for (int i = 0; i< [sectionsArray count]; i++) {
int row = (int)i/3;
int col = i%3;
float x = 6.5 + (104.5*col);
float y = 8 + (106*row);
UIView *sectionView = [[UIView alloc] initWithFrame:CGRectMake(x, y, 98, 98)];
sectionView.backgroundColor = [UIColor clearColor];
//button
UIButton *sectionButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[sectionButton setTintColor:[UIColor grayColor]];
sectionButton.frame = CGRectMake(0, 0, 98, 98);
sectionButton.tag = i+100;
[sectionButton addTarget:self action:#selector(showSectionDetail:) forControlEvents:UIControlEventTouchUpInside];
[sectionView addSubview:sectionButton];
//adding title
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 75, 98, 20)];
titleLabel.textAlignment = UITextAlignmentCenter;
titleLabel.backgroundColor=[UIColor clearColor];
titleLabel.font=[UIFont fontWithName:#"Helvetica" size:14];
titleLabel.textColor = [UIColor colorWithRed:241.0/255.0 green:124.0/255.0 blue:22.0/255.0 alpha:1.0];
titleLabel.text = [[sectionsArray objectAtIndex:i] objectForKey:#"Title"];
[sectionView addSubview:titleLabel];
[titleLabel release];
[scroll addSubview:sectionView];
[sectionView release];
}
int numberOfRows;
if ([sectionsArray count]/3.0f == 0) {
numberOfRows = [sectionsArray count]/3;
}else{
numberOfRows = [sectionsArray count]/3 +1;
}
scroll setContentSize:CGSizeMake(320, numberOfRows*106);

Answer 2

Here's what I used until the UICollectionView was released, easy to modify to accommodate for how many rows you want in the grid, and the size of the views.
NSUInteger buttonWidth = 100;
NSUInteger buttonHeight = 100;
NSUInteger space = 5;
float scrollContentY = (ceilf((float)imageNames.count / 3.0f) * (buttonHeight + space));
[myArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
int row = idx / 3;
int column = idx % 3;
UIView *view = [UIView new];
[view setBackgroundColor:[UIColor redColor]];
view.frame = CGRectMake((buttonWidth + space) * column + space, (buttonHeight + space) * row + space , buttonWidth, buttonHeight);
[view setTag:(NSInteger)idx];
[self.scrollView addSubview:view];
[self.scrollView setContentSize:CGSizeMake(self.scrollView.frame.size.width, scrollContentY)];
}];
Mind you, this might not be advisable if you have a large array to enumerate because this doesn't have any kind of reusable views. It will alloc/init a view for every item in the array.