ios - UITapGestureRecognizer 不在导航栏标题 View 中的 UIView 上工作？

Question

我正在尝试在 navigationBar titleView 上添加 tapGesture 但没有收到任何事件。请告诉我如何解决这个问题。

 let titleView = UIView()
 titleView.frame = CGRect(x: 0, y: 0, width: 100, height: 60)
 titleView.backgroundColor = UIColor.yellow

 let profileImageView = UIImageView()
 profileImageView.contentMode = .scaleAspectFill
 profileImageView.layer.cornerRadius = 20
 profileImageView.clipsToBounds = true
 profileImageView.loadImageUsingCacheWithUrlString(urlString: user.image)
 titleView.addSubview(profileImageView)
 profileImageView.translatesAutoresizingMaskIntoConstraints = false
 profileImageView.leftAnchor.constraint(equalTo: titleView.leftAnchor).isActive = true
 profileImageView.centerYAnchor.constraint(equalTo: titleView.centerYAnchor).isActive = true
 profileImageView.widthAnchor.constraint(equalToConstant: 40).isActive = true
 profileImageView.heightAnchor.constraint(equalToConstant: 40).isActive = true

 let nameLabel = UILabel()
 nameLabel.text = user.name
 nameLabel.font = UIFont(name: "HelveticaNeue-Medium", size: 17)
 titleView.addSubview(nameLabel)
 nameLabel.translatesAutoresizingMaskIntoConstraints = false
 nameLabel.leftAnchor.constraint(equalTo: profileImageView.rightAnchor, constant: 8).isActive = true
 nameLabel.centerYAnchor.constraint(equalTo: profileImageView.centerYAnchor).isActive = true
 nameLabel.rightAnchor.constraint(equalTo: titleView.rightAnchor).isActive = true
 nameLabel.heightAnchor.constraint(equalTo: profileImageView.heightAnchor).isActive = true

 self.navigationItem.titleView = titleView
 titleView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(showChatTableViewController)))

Answer 1

确保将 isUserInteractionEnabled 设置为 true。默认情况下它是 true 但如果它在你的情况下不起作用然后尝试设置 true

确保调试您的代码并检查添加 titleView 后是否能够打印出 self.navigationItem.titleView ？

let titleView = UIView()
titleView.frame = CGRect(x: 0, y: 0, width: 100, height: 60)
titleView.backgroundColor = UIColor.yellow
titleView.isUserInteractionEnabled = true

self.navigationItem.titleView = titleView
titleView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(showChatTableViewController)))

@objc func showChatTableViewController() {
    print("tapped")
}