iPhone SDK - UIButton not working in custom view - iphone

Question

This is driving me nuts... I've seen a few posts on similar issues but can't seem to make it work, so here it is:
it is a very simple example, I am just creating a custom UIButton in a custom view, then assigning it a custom action to respond to touch events. When I run the app, the button is created, but nothing happens when I try to click it.
Here is the code for my custom class:
#import "MySegmentedControl.h"
#implementation MySegmentedControl
#synthesize button1;
- (id)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])) {
CGFloat a = frame.origin.x+5;
CGFloat b = frame.origin.y+5;
CGFloat l = frame.size.width-15;
CGFloat h = frame.size.height-15;
CGFloat c = a+l;
CGFloat d = b;
CGRect frame2 = CGRectMake(a, b, l, h);
UIButton *mybutton1 = [UIButton buttonWithType:UIButtonTypeCustom];
mybutton1.frame = frame2;
[mybutton1 setTitle:#"TEST" forState:UIControlStateNormal];
mybutton1.titleLabel.textColor = [UIColor blackColor];
mybutton1.backgroundColor = [UIColor blueColor];
[mybutton1 addTarget:self action:#selector(action)forControlEvents:UIControlEventTouchUpInside];
[self setButton1:mybutton1];
self.userInteractionEnabled = YES;
button1.userInteractionEnabled = YES;
[self addSubview:button1];
[self bringSubviewToFront:button1];
}
return self;
}
-(void)action {
[button1 setTitle:#"done" forState:UIControlStateNormal];
button1.backgroundColor = [UIColor greenColor];
NSLog(#"Working!");
}
And here is the appDelegate:
#import "MySegmentedControlAppDelegate.h"
#import "MySegmentedControl.h"
#implementation MySegmentedControlAppDelegate
#synthesize window;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
[window makeKeyAndVisible];
MySegmentedControl *mycontrol = [[MySegmentedControl alloc] initWithFrame:CGRectMake(10,50,135,50)];
[window addSubview:mycontrol];
return YES;
}
as you can see from the custom class, from what I've read in other posts I've tried to add a few things to increase my chances of success:
enabling the custom's view userinteraction
bringing the UIButton to front
making sure the button's frame is completely included in the view's frame
...
... yet it still doesn't work!...
Any help would be greatly appreciated - thanks!
Edit: here is also the header for the custom view:
#import <UIKit/UIKit.h>
#interface MySegmentedControl : UIView {
UIButton *button1;
}
#property (nonatomic, retain) IBOutlet UIButton *button1;
- (void)action;
#end

Answer 1

Can you join the header file of your custom view too?
(Sorry to do that in answer, I don't just have enough reputation for the moment).
Edit (and real answer) :
I've build a projet similar to yours and I think I've find the problem.
Your button frame is not good. Look at this screenshot from simulator, custom UIView frame is in red (just add self.backgroundColor=[UIColor redColor]; in your view constructor) :
By using this code :
CGFloat a = frame.origin.x+5;
CGFloat b = frame.origin.y+5;
CGFloat l = frame.size.width-15;
CGFloat h = frame.size.height-15;
You refer at the frame in windows base coordinates ! So your button is outside of your view and it can't handle touch event.
If you want to place your button dynamically, you should use this :
CGFloat a = self.bounds.origin.x+5;
CGFloat b = self.bounds.origin.y+5;
GFloat l = self.bounds.size.width-15;
CGFloat h = self.bounds.size.height-15;
By using self.bounds you use view base coordinate and it's working (see screenshots below) !
Hope this helps !