check if a uiView has handled touch - objective-c

Question

What I want to do is put a UIView on top of another UIView, and both of them are screen size. The top UIView includes lots cocos nodes and will respond when I touch them. But when I touch a place that has no cocos node, the bottom UIView should respond.
I don't know how to do this. My imagine is check if top uiView is handled touch, do nothing. other wise let the bottom UIView start respond. But I don't know how to check that. I only know how to check touch but it seems the UIView will also be touched when I touch some place it can't handle.

Answer 1

I think you not requires 2 views.
Just take one view only and add all your node to that view.
in .h
IBOutlet UIView *bgView;//your view
UITapGestureRecognizer *viewTapRecognizer;// view tap recognizer
in .m
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
viewTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handelGesture:)];
[bgView addGestureRecognizer:viewTapRecognizer];
for (UIView *subView in [bgView subviews]) {
UITapGestureRecognizer *nodeTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handelGesture:)];
[subView addGestureRecognizer:nodeTapRecognizer];
}
}
- (void)handelGesture:(UITapGestureRecognizer*)sender {
if (sender == viewTapRecognizer) {
// your view is tapped
NSLog(#"........Tapped view..........");
}
else {
// your node is tapped
NSLog(#"........Tapped node..........");
}
}
Try this. it might work for you.

Answer 2

You can achieve it by 2 ways: using pointInside... method or hitTest... method.
If you will use pointInside... you can use only your views (the top view and the bottom view). You will subclass UIView with the top view and override pointInside... method. You will return YES if user's tapped a cocoa node else returns NO.
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
BOOL inside = [self didUserTapCocoaNode:point];
return inside;
}
If you want more complex logic, you should use third view, subclass of UIView (the container view), that will be contain the top view and the bottom view. Override method hitTest..., and return the bottom or the top view.
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
UIView* result = nil;
if ([self touchedCocoaNode:point])
{
result = self.topView;
}
else
{
result = self.bottomView;
}
return result;
}
UPD
Example implementation of didUserTapCocoaNode with pseudo code:
- (BOOL)didUserTapCocoaNode:(CGPoint)pointInSelf
{
__block BOOL tappedSomeNode = NO;
[self.nodes enumerateObjectsUsingBlock:^(NodeType* obj, NSInteger idx, BOOL* stop){
CGPoint pointInNode = [obj convertPoint:pointInSelf fromView:self];
tappedSomeNode = [obj pointInside:pointInNode withEvent:nil];
*stop = tappedSomeNode;
}]
return tappedSomeNode;
}