Snapkit seems to be blocking all the GestureRecognizers on subviews - ios

Question

I've created a custom UIView which has a UITapGestureRecognizer added to it in it's own init:
class BoxView: UIView, UIGestureRecognizerDelegate {
override init(frame: CGRect) {
super.init(frame: frame)
self.construct()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.construct()
}
convenience init() {
self.init(frame: CGRect.zero)
}
func construct() {
self.backgroundColor = UIColor.whiteColor()
self.frame.size = CGSize(width: 125, height: 125)
let tapGesture = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
tapGesture.delegate = self
self.addGestureRecognizer(tapGesture)
}
func handleTap(sender: UITapGestureRecognizer? = nil) {
print("handleTap called!")
}
}
I'm using it in a ViewController, like this:
import Foundation
import UIKit
import AVFoundation
class StartViewController: UIViewController {
private var boxView: BoxView = BoxView()
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.blackColor()
self.view.addSubview(self.boxView)
/* block: XXX
self.boxView.snp_makeConstraints { (make) -> Void in
make.center.equalTo(self.view)
}
*/
}
}
The gestures don't seem to work as soon as I uncomment the block marked "XXX" in the ViewController which adds the SnapKit constraints. Can someone help me understand what's going on here? Am I using the gesture recognizer correctly?

Answer 1

Looks like I missed an important constraint, adding a "size" constraint on the custom view (BoxView) fixed it.
func construct() {
self.backgroundColor = UIColor.whiteColor()
self.frame.size = CGSize(width: 125, height: 125)
self.snp_makeConstraints { (make) -> Void in
make.size.equalTo(self.frame.size)
}
let tapGesture = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
tapGesture.delegate = self
self.addGestureRecognizer(tapGesture)
}