I'm using HMSegmentedControl, an open-source UISegmentedControl subclass. I'm trying to react to the user tapping on the currently selected segment. HMSegmentedControl only supports reacting to a segment CHANGE, with either UIControlEventValueChanged or a block that executes when the index is changed. I need to react to the currently selected segment in order to present a drop-down menu. Here is what I've done so far:
-(void)segmentedControlValueChanged:(HMSegmentedControl *)control { CGFloat midX = self.view.frame.size.width / 2 - _filterView.frame.size.width / 2; _filterView.frame = CGRectMake(midX, -_filterView.frame.size.height+64, _filterView.frame.size.width, _filterView.frame.size.height); _filterView.hidden = YES; _filterBackgroundView.alpha = 0.0f; _filterBackgroundView.hidden = YES; } -(void)segmentedControlTouchUpInside:(UIGestureRecognizer *)gr { if(!_filterView) { _filterView = (HomeFilterView *)[[NSBundle mainBundle] loadNibNamed:@"HomeFilterView" owner:self options:nil].firstObject; CGFloat midX = self.view.frame.size.width / 2 - _filterView.frame.size.width / 2; _filterView.frame = CGRectMake(midX, -_filterView.frame.size.height+64, _filterView.frame.size.width, _filterView.frame.size.height); _filterView.delegate = self; [self.view insertSubview:_filterView belowSubview:self.segmentedControl]; } if(!_filterBackgroundView) { _filterBackgroundView = [[UIView alloc] initWithFrame:self.view.bounds]; _filterBackgroundView.backgroundColor = [UIColor blackColor]; _filterBackgroundView.alpha = 0.0f; [self.view insertSubview:_filterBackgroundView belowSubview:_filterView]; } _filterView.hidden = NO; _filterBackgroundView.hidden = NO; [UIView animateWithDuration:0.5f delay:0.0f usingSpringWithDamping:0.55f initialSpringVelocity:0.0f options:UIViewAnimationOptionCurveLinear animations:^{ CGFloat midX = self.view.frame.size.width / 2 - _filterView.frame.size.width / 2; CGFloat y = self.segmentedControl.frame.size.height + self.segmentedControl.frame.origin.y; _filterView.frame = CGRectMake(midX, y-70, _filterView.frame.size.width, _filterView.frame.size.height); } completion:^(BOOL finished) { }]; [UIView animateWithDuration:0.25f animations:^{ _filterBackgroundView.alpha = 0.5f; } completion:^(BOOL finished) { }]; } I added a tap gesture recognizer to the segmented control. So, if a user selects the current segment, only segmentedControlTouchUpInside: will be fired. If a user selected a different segment, segmentedControlTouchUpInside: is fired, followed by segmentedControlValueChanged:. I'm relying on the segmentedControlValueChanged: method to be called after the gesture-recognizer method, and essentially "undo" the adding of the drop-down to the UI.
This is the only way I could figure out to handle the tapping of the current segment. It seems to accomplish what I'm going for in the UI, but can anyone think of a better way of doing this? Is this safe to do?
