Forward event from custom UIControl subclass
- by ggould75
My custom subclass extend UIControl (MyCustomUIControl)
Basically it contains 3 subviews:
UIButton (UIButtonTypeCustom)
UIImageView
UILabel
All the class works great but now I want to connect some events generated from this class to another. In particular when the button is pressed I want to forward the event to the owner viewcontroller so that I can handle the event. The problem is that I can't figure out how to implement this behaviour.
Within EditableImageView I can catch the touch event using [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside] but I don't know how to forward it inside of the buttonPressed selector.
I also tried to implement touchesBegan but it seems never called...
I'd like to capture the button press event from the viewcontroller in this way:
- (void)viewDidLoad {
[super viewDidLoad];
self.imageButton = [[EditableImageView alloc] initWithFrame:CGRectMake(50.0f, 50.0f, 80.0f, 80.0f)];
[imageButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:imageButton];
[imageButton setEditing:NO];
}
This is my UIControl subclass initialization method:
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
[self setBackgroundColor:[UIColor clearColor]];
button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0.0f, 0.0f, frame.size.width, frame.size.height);
[button setImage:[UIImage imageNamed:@"nene_70x70.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
transparentLabelBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"editLabelBackground.png"]];
transparentLabelBackground.hidden = YES;
[self addSubview:transparentLabelBackground];
// create edit status label
editLabel = [[UILabel alloc] initWithFrame:CGRectZero];
editLabel.hidden = YES;
editLabel.userInteractionEnabled = NO; // without this assignment the button will not be clickable
editLabel.textColor = [UIColor whiteColor];
editLabel.backgroundColor = [UIColor clearColor];
editLabel.textAlignment = UITextAlignmentLeft;
UIFont *labelFont = [UIFont systemFontOfSize:16.0];
editLabel.font = labelFont;
editLabel.text = @"edit";
labelSize = [@"edit" sizeWithFont:labelFont];
[self addSubview:editLabel];
}
return self;
}
Thanks.
