Enable UserInteraction to some part of UIViewController - ios

Question

I have been researching about it since last 3 to 4 hours but I didn't get any information. My issue is I want to enable userInteraction to some part of the UIViewController.
Description:
I have a UIViewController. I have added 30 tableviews. I have stored one value in the application. If that value is 1 then I have to enable user interaction for tableview1 only and if the value is 2 then tableview2 only ........etc
. Please let me know if I am not clear. Thank you for spending your valuable time. Thanks in advance

Answer 1

A simple way to do it is to subclass UIView and override - (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event.
Return NO for the part of the UIView (represented as ignoreRect in the sample) you want the subviews to ignore touches.
#interface InteractionView ()
#property (nonatomic) CGRect ignoreRect;
#end
#implementation InteractionView
- (void)awakeFromNib {
self.ignoreRect = CGRectMake(0.0f, 0.0f, 300.0f, 300.0f);
}
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
if (CGRectContainsPoint(self.ignoreRect, point)) {
return NO;
}
return [super pointInside:point withEvent:event];
}
#end
If you need more tweaking for an expected behavior : for exemple return a specific view for a specific zone, return the top view of a specific zone, ... you may use
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
if (CGRectContainsPoint(self.ignoreRect, point)) {
return nil; // Edit that part if you want to return a chosen view
}
return [super hitTest:point withEvent:event];
}

Answer 2

Another solution without - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event. is to adding UIButton as a subview to the part of UIView you want to close interaction.
for example if you want to close interaction of the bottom half of view.
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, self.view.frame.size.height*0.5f, self.view.frame.size.width, self.view.frame.size.height*0.5);
[self.view addSubview:button];
since it will get the touch events, half of the view will be closed to user interaction.
EDIT
IBOutletCollection(UITableView) NSArray *allTableViews;// get all your tableviews reference to this array. set tag in interface builder for each array to reach later.
then when you want to enable/disable interaction of related tableview
int tagToOpenInteraction = 1;//or whatever it is
for(UITableView *t in allTableViews)
{
if(t.tag == tagToOpenInteraction)
[t setUserInteractionEnabled:YES];
else
[t setUserInteractionEnabled:NO];
}