Connect a UITapGestureRecognizer to a UIView - objective-c

Question

I'm trying to connect a gesture to a UIView so I can tap on the object, but it is not working. What am I doing wrong?
Shape.h
#import <UIKit/UIKit.h>
#interface Shape : UIView;
- (id) initWithX: (int)xVal andY: (int)yVal;
#end
Shape.m
#import "Shape.h"
#implementation Shape
- (id) initWithX:(int )xVal andY:(int)yVal {
self = [super init];
UIView *shape = [[UIView alloc] initWithFrame:CGRectMake(xVal, yVal, 10, 10)];
shape.backgroundColor = [UIColor redColor];
shape.userInteractionEnabled = YES;
[self addSubview:shape];
return self;
}
#end
MODIFIED CODE: The following code is in the main ViewController. I have removed the UITapGestureRecognizer from the Shape class. The code works if I make the following change, but then it is 'box' that responds to the tap gesture, not 'shape':
[shape addGestureRecognizer:tap];
to
[box addGestureRecognizer:tap];
- (void)handlerTap:(UITapGestureRecognizer *)recognizer {
//CGPoint location = [recognizer locationInView:[recognizer.view superview]];
NSLog(#"Success");
}
-(void)drawShapes{
NSLog(#"Draw");
if(!box){
box = [[UIView alloc] initWithFrame:CGRectMake(0, 0, screenWidth, screenHeight-100)];
box.backgroundColor = [UIColor colorWithRed: 0.8 green: 0.8 blue: 0.0 alpha:0.2];
[self.view addSubview:box];
}
for (int i = 0; i<5; i++) {
int x = arc4random() % screenWidth;
int y = arc4random() % screenHeight;
Shape * shape =[[Shape alloc] initWithX:x andY:y ];
[box addSubview:shape];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];
[tap setNumberOfTapsRequired:1];
[tap addTarget:self action:#selector(handlerTap:)];
[box addGestureRecognizer:tap];
}
}
SOLUTION: I have learned that
self = [super init];
needs to be changed to include a CGRECT that defines the boundaries of the view that *shape is placed into.
self = [super initWithFrame:CGRectMake(xVal, yVal, 10, 10)];
Also, *shape needs to be placed at 0,0 to ensure its correct placement within its parent.
UIView *shape = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
#import "Shape.h"
#implementation Shape
- (id) initWithX:(int )xVal andY:(int)yVal {
self = [super initWithFrame:CGRectMake(xVal, yVal, 10, 10)];
UIView *shape = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
shape.backgroundColor = [UIColor redColor];
shape.userInteractionEnabled = YES;
[self addSubview:shape];
return self;
}
#end

Answer 1

You should set the target of the gesture recognizer to self, not the view, because you implemented the handlerTap: method in the Shape class.