ios Help Screen semi-transparent overlay - objective-c

Question

Wondering if anyone can shed some light on how to create a semi-transparent Help screen on an ipad or iphone app? Something similar to Googles app.
I have a splitViewController and I want to overlay a see-through black overlay on top of the splitViewController where I can show Help information about each item you can click in the splitViewController.
I followed http://cocoawithlove.com/2009/04/showing-message-over-iphone-keyboard.html which gets me the overlay, but I am now adding clickable UIViews (eg a close button to dismiss the overlay). The issue is when I setup touchesEnded:withEvent I cannot seem to convert clicks from the main LoadingView to closeButton to see what was actually clicked?
See the touches ended at the end of the code
================================================================
#import "HelpView.h"
#import <QuartzCore/QuartzCore.h>
//
CGPathRef NewPathWithRoundRect(CGRect rect, CGFloat cornerRadius)
{
//
// Create the boundary path
//
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL,
rect.origin.x,
rect.origin.y + rect.size.height - cornerRadius);
// Top left corner
CGPathAddArcToPoint(path, NULL,
rect.origin.x,
rect.origin.y,
rect.origin.x + rect.size.width,
rect.origin.y,
cornerRadius);
// Top right corner
CGPathAddArcToPoint(path, NULL,
rect.origin.x + rect.size.width,
rect.origin.y,
rect.origin.x + rect.size.width,
rect.origin.y + rect.size.height,
cornerRadius);
// Bottom right corner
CGPathAddArcToPoint(path, NULL,
rect.origin.x + rect.size.width,
rect.origin.y + rect.size.height,
rect.origin.x,
rect.origin.y + rect.size.height,
cornerRadius);
// Bottom left corner
CGPathAddArcToPoint(path, NULL,
rect.origin.x,
rect.origin.y + rect.size.height,
rect.origin.x,
rect.origin.y,
cornerRadius);
// Close the path at the rounded rect
CGPathCloseSubpath(path);
return path;
}
#implementation HelpView
#synthesize closeButton = _closeButton;
- (id)loadingViewInView:(UIView *)aSuperview
{
HelpView *loadingView =
[[HelpView alloc] initWithFrame:[aSuperview bounds]];
if (!loadingView)
{
return nil;
}
loadingView.opaque = NO;
loadingView.autoresizingMask =
UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[aSuperview addSubview:loadingView];
const CGFloat DEFAULT_LABEL_WIDTH = 100.0;
const CGFloat DEFAULT_LABEL_HEIGHT = 40.0;
CGRect labelFrame = CGRectMake(0, 0, DEFAULT_LABEL_WIDTH, DEFAULT_LABEL_HEIGHT);
UILabel *loadingLabel = [[UILabel alloc] initWithFrame:labelFrame];
loadingLabel.text = NSLocalizedString(#"Close", nil);
loadingLabel.textColor = [UIColor whiteColor];
loadingLabel.backgroundColor = [UIColor clearColor];
loadingLabel.textAlignment = UITextAlignmentCenter;
loadingLabel.font = [UIFont boldSystemFontOfSize:[UIFont labelFontSize]];
loadingLabel.autoresizingMask =
UIViewAutoresizingFlexibleLeftMargin |
UIViewAutoresizingFlexibleRightMargin |
UIViewAutoresizingFlexibleTopMargin |
UIViewAutoresizingFlexibleBottomMargin;
// Background for Close button
CALayer *closeButtonBackground = [CALayer layer];
closeButtonBackground.opacity = 0.3;
closeButtonBackground.borderColor = [UIColor whiteColor].CGColor;
closeButtonBackground.borderWidth = 2.0;
closeButtonBackground.cornerRadius = 5.0;
closeButtonBackground.backgroundColor = [UIColor blackColor].CGColor;
// Finish setting up frame for Close button
labelFrame.origin.x = 0;
labelFrame.origin.y = 0;
loadingLabel.frame = labelFrame;
closeButtonBackground.frame = labelFrame;
CGRect viewRect = CGRectMake(loadingView.frame.size.width -150 ,loadingView.frame.size.height - 85,100,40);
self.closeButton = [[UIView alloc] initWithFrame:viewRect];
self.closeButton.userInteractionEnabled = YES;
self.userInteractionEnabled = NO;
[loadingView addSubview:self.closeButton];
[self.closeButton.layer addSublayer:closeButtonBackground];
[self.closeButton addSubview:loadingLabel];
// Set up the fade-in animation
CATransition *animation = [CATransition animation];
[animation setType:kCATransitionFade];
[[aSuperview layer] addAnimation:animation forKey:#"layerAnimation"];
//[loadingView createGestureRecognizer];
return loadingView;
}
- (void)removeView
{
UIView *aSuperview = [self superview];
[super removeFromSuperview];
// Set up the animation
CATransition *animation = [CATransition animation];
[animation setType:kCATransitionFade];
[[aSuperview layer] addAnimation:animation forKey:#"layerAnimation"];
}
- (void)drawRect:(CGRect)rect
{
rect.size.height -= 1;
rect.size.width -= 1;
const CGFloat RECT_PADDING = 0.0;
rect = CGRectInset(rect, RECT_PADDING, RECT_PADDING);
const CGFloat ROUND_RECT_CORNER_RADIUS = 0.0;
CGPathRef roundRectPath = NewPathWithRoundRect(rect, ROUND_RECT_CORNER_RADIUS);
CGContextRef context = UIGraphicsGetCurrentContext();
const CGFloat BACKGROUND_OPACITY = 0.85;
CGContextSetRGBFillColor(context, 0, 0, 0, BACKGROUND_OPACITY);
CGContextAddPath(context, roundRectPath);
CGContextFillPath(context);
const CGFloat STROKE_OPACITY = 0.25;
CGContextSetRGBStrokeColor(context, 1, 1, 1, STROKE_OPACITY);
CGContextAddPath(context, roundRectPath);
CGContextStrokePath(context);
CGPathRelease(roundRectPath);
}
- (void)handleSingleDoubleTap:(UITapGestureRecognizer *)sender {
NSLog(#"");
CGPoint tapPoint = [sender locationInView:sender.view];
CALayer* layerThatWasTapped = [self.layer hitTest:tapPoint];
CGPoint convertedPoint = [layerThatWasTapped convertPoint:layerThatWasTapped.position toLayer:self.closeButton.layer];
BOOL myBool = [self.closeButton.layer containsPoint:convertedPoint];
[UIView beginAnimations:nil context:NULL];
sender.view.center = tapPoint;
[UIView commitAnimations];
}
- (void) touchesEnded: (NSSet *) touches withEvent: (UIEvent *) event {
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView: self];
CGPoint convertedPoint = [self convertPoint:point toView:[self.closeButton superview]];
if (CGRectContainsPoint(self.closeButton.bounds, convertedPoint)) {
NSLog (#"YAY!");
}
} // touchesEnded

Answer 1

Solved this with NSNotifications. Something like this... its a little static... should be more dynamic.
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:#selector(eventHandler:)
name:#"SomeButtonClicked"
object:nil ];
-(void)eventHandler: (NSNotification *) notification
{
NSString *buttonWhichWasClicked = [[notification userInfo] objectForKey:#"buttonName"];
NSLog(#" %#", buttonWhichWasClicked);
if ([buttonWhichWasClicked isEqualToString:#"close"]){
[self removeView];
}
//Tell other buttons to dim/remove themselves as a new one was selected
}
- (void)removeView
{
//code to remove view
}