iOS - Capturing button click on subview added to UITableViewCell - ios

Question

I am trying to use the CollapseClick table control. This all works, but I can't seem to add a button event to the view that is shown when the table cell is expanded.
Looking through the code, it is UITableView, which created UITableViewCells and adds UIViews dynamically. I think the UIView is added here:
+ (CollapseClickCell *)newCollapseClickCellWithTitle:(NSString *)title index:(int)index content:(UIView *)content {
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"CollapseClickCell" owner:nil options:nil];
CollapseClickCell *cell = [[CollapseClickCell alloc] initWithFrame:CGRectMake(0, 0, 320, kCCHeaderHeight)];
cell = [views objectAtIndex:0];
// Initialization Here
cell.TitleLabel.text = title;
cell.index = index;
cell.TitleButton.tag = index;
cell.ContentView.frame = CGRectMake(cell.ContentView.frame.origin.x, cell.ContentView.frame.origin.y, cell.ContentView.frame.size.width, content.frame.size.height);
[cell.ContentView addSubview:content];
return cell;
}
The button displays, but if I try and hook up any events I cannot capture them.
It's probably quite simple. I have put the app here: http://www.havoc-media.com/TravelApp.zip

Answer 1

Upon looking at your code, you have a few overlooks, when it comes to using views.
The most important thing to know about views are that in order to have click events register on subviews the parent view cannot be smaller. The silly thing here is that even though you can visually see a view you inject into your ContentView, the Content view's width is set to zero, which means that all the views inside the ContentView may show, but will not respond to click events and the click events will default to the parentview of the ContentView, thus making your buttons unusable and unresponsive.
To address this in your openCollapseClickCellAtIndex you need to add the code:
cell.ContentView.frame = CGRectMake(cell.ContentView.frame.origin.x, cell.ContentView.frame.origin.y, 320, cell.ContentView.frame.size.height);
Your second issue is your CollapseClickCell xib you created is not communicating back to the view controller. Which means the view you created in the view controller and injected in the CollapseClickCell xib of which you want to report back to the view controller....isn't.
There is a way to address this but in my opinion I would create another custom xib-A to inject into your CollapseClickCell, and have the xib-A handle your button click events instead of test1View. Create a xib called "testView" linked to a test class and put this code in
-(UIView *)viewForCollapseClickContentViewAtIndex:(int)index
{
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"testView" owner:nil options:nil];
UIView *content = [views objectAtIndex:0];
switch (index) {
case 0:
return content; /*test1View;*/
break;
Once these two issues are addressed, your code will work. I can include the additions I made to your code to make it work if you would like to see it?

Answer 2

First of all, this code is not correct:
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"CollapseClickCell" owner:nil options:nil];
CollapseClickCell *cell = [[CollapseClickCell alloc] initWithFrame:CGRectMake(0, 0, 320, kCCHeaderHeight)];
cell = [views objectAtIndex:0];
You are first creating a cell via [collapseClickCell alloc]. But after that you assign the first object of the array created with loadNibNamed:owner:options:nil to the same variable. You either load the cell from the nib or you create it programatically. Simply put, you should just use:
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"CollapseClickCell" owner:nil options:nil];
CollapseClickCell *cell = [views objectAtIndex:0];
Be aware that the rect you were providing to the initWithFrame: method was not being used at all
Adding buttons to a cell is not the most appropriate thing (the whole cell should be the button). But if you absolutely need to, try assigning a uibutton as the accessory view of the cell. Take a look at http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewCell_Class/Reference/Reference.html#//apple_ref/occ/instp/UITableViewCell/accessoryView
Something similar to:
UITableViewCell *cell = (obtain your cell)
UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(buttonTapped) forControlEvents:UIControlEventTouchUpInside];
button.frame = CGRectMake(x,y,width,height);
cell.accessoryView = button;