UIImageView not responding to gestures on certain edges - ios

Question

I am making a custom control which consists of UIImageView and Label. The control behaves like a checkbox.
Here is the code:
-(instancetype) initWithTitle:(NSString *)title normalCheckBoxImage:(NSString *)normalCheckBoxImage selectedCheckBoxImage:(NSString *)selectedCheckBoxImage
{
self = [super init];
self.userInteractionEnabled = YES;
self.normalCheckBoxImageName = normalCheckBoxImage;
self.selectedCheckBoxImageName = selectedCheckBoxImage;
self.title = title;
[self setupSubViews];
[self registerGestureRecognizers];
return self;
}
-(void) registerGestureRecognizers
{
UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(checkBoxTapped:)];
singleTapGestureRecognizer.delegate = self;
singleTapGestureRecognizer.numberOfTapsRequired = 1;
[self.checkBoxImageView addGestureRecognizer:singleTapGestureRecognizer];
}
-(void) checkBoxTapped:(UITapGestureRecognizer *) recognizer
{
self.isChecked = !self.isChecked;
if(self.isChecked)
{
[self.checkBoxImageView setImage:[UIImage imageNamed:self.selectedCheckBoxImageName]];
}
else
{
[self.checkBoxImageView setImage:[UIImage imageNamed:self.normalCheckBoxImageName]];
}
}
-(void) setupSubViews
{
self.checkBoxImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:self.normalCheckBoxImageName]];
self.checkBoxImageView.frame = CGRectMake(0, 0, 50, 50);
NSLog(#"width = %f; height = %f",self.checkBoxImageView.frame.size.width,self.checkBoxImageView.frame.size.height);
[self.checkBoxImageView setUserInteractionEnabled:YES];
// The init with frame should be replaced by the NSConstraints
self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(self.checkBoxImageView.frame.size.width + 5, 10, 100, 20)];
self.titleLabel.text = self.title;
[self addSubview:self.checkBoxImageView];
[self addSubview:self.titleLabel];
}
I have attached gesture recognizer to the UIImageView. But for some reason it only fires when I am close to the left edge of the UIImageView. I am not sure what I am doing wrong. If I touch in the middle of the uIImageView then it does not do anything.
Here is the image:

Answer 1

The problem was the frame for the super view was not correct. Instead of width and height of 50 X 50 it was 50 X 20.
AZCheckBox *checkbox = [[AZCheckBox alloc] initWithTitle:#"I agree" normalCheckBoxImage:#"NormalCheckBoxImage" selectedCheckBoxImage:#"SelectedCheckBoxImage"];
checkbox.frame = CGRectMake(100, 100, 200, 50);
checkbox.delegate = self;
[self.view addSubview:checkbox];