iPhone UIButton addTarget:action:forControlEvents: not working
- by Aaron Vegh
I see there are similar problems posted here, but none of the solutions work for me. Here goes:
I have a UIButton instance inside a UIView frame, which is positioned within another UIView frame, which is positioned in the main window UIView. To wit:
UIWindow
--> UIView (searchView)
--> UISearchBar (findField)
--> UIView (prevButtonView)
--> UIButton (prevButton)
--> UIView (nextButtonView)
--> UIButton (nextButton)
So far, so good: everything is laid out as I want it. However, the buttons aren't accepting user input of any kind. I am using the UIButton method addTarget:action:forControlEvents: and to give you an idea of what I'm doing, here's my code for nextButton:
nextButton = [UIButton buttonWithType:UIButtonTypeCustom];
[nextButton setImage:[UIImage imageNamed:@"find_next_on.png"] forState:UIControlStateNormal];
[nextButton setImage:[UIImage imageNamed:@"find_next_off.png"] forState:UIControlStateDisabled];
[nextButton setImage:[UIImage imageNamed:@"find_next_off.png"] forState:UIControlStateHighlighted];
[nextButton addTarget:self action:@selector(nextResult:) forControlEvents:UIControlEventTouchUpInside];
The method nextResult: never gets called, the state of the button doesn't change on touching, and there's not a damned thing I've been able to do to get it working. I assume that there's an issue with all these layers of views: maybe something is sitting on top of my button, but I'm not sure what it could be.
In the interest of information overload, I found a bit of code that would print out all my view info. This is what I get for my entire view hierarchy:
UIWindow
{{0, 0}, {320, 480}}
UILayoutContainerView
{{0, 0}, {320, 480}}
UINavigationTransitionView
{{0, 0}, {320, 480}}
UIViewControllerWrapperView
{{0, 64}, {320, 416}}
UIView
{{0, 0}, {320, 416}}
UIWebView
{{0, 44}, {320, 416}}
UIScroller
{{0, 0}, {320, 416}}
UIImageView
{{0, 0}, {54, 54}}
UIImageView
{{0, 0}, {54, 54}}
UIImageView
{{0, 0}, {54, 54}}
UIImageView
{{0, 0}, {54, 54}}
UIImageView
{{-14.5, 14.5}, {30, 1}}
UIImageView
{{-14.5, 14.5}, {30, 1}}
UIImageView
{{0, 0}, {1, 30}}
UIImageView
{{0, 0}, {1, 30}}
UIImageView
{{0, 430}, {320, 30}}
UIImageView
{{0, 0}, {320, 30}}
UIWebDocumentView
{{0, 0}, {320, 21291}}
UIView
{{0, 0}, {320, 44}}
UISearchBar
{{10, 8}, {240, 30}}
UISearchBarBackground
{{0, 0}, {240, 30}}
UISearchBarTextField
{{5, -2}, {230, 31}}
UITextFieldBorderView
{{0, 0}, {230, 31}}
UIPushButton
{{205, 6}, {19, 19}}
UIImageView
{{10, 8}, {15, 15}}
UILabel
{{30, 7}, {163, 18}}
UIView
{{290, 15}, {23, 23}}
UIButton
{{0, 0}, {0, 0}}
UIImageView
{{-12, -12}, {23, 23}}
UIView
{{260, 15}, {23, 23}}
UIButton
{{0, 0}, {0, 0}}
UIImageView
{{-12, -12}, {23, 23}}
UINavigationBar
{{0, 20}, {320, 44}}
UINavigationButton
{{267, 7}, {48, 30}}
UIImageView
{{0, 0}, {48, 30}}
UIButtonLabel
{{11, 7}, {26, 15}}
UINavigationItemView
{{79, 8}, {180, 27}}
UINavigationItemButtonView
{{5, 7}, {66, 30}}
MBProgressHUD
{{0, 0}, {320, 480}}
UIActivityIndicatorView
{{141, 206}, {37, 37}}
UILabel
{{117, 247}, {86, 27}}
The relevant part is noted above the UINavigationBar section.
Anyone have any suggestions? I'm all out.
Thanks for reading.
Aaron.
