[英]UIButton in custom UIScrollView class not responding to touches
我有一个如下的视图结构;
-->Custom Scroll View
-->Container View
-->View
-->Button
我的问题是我向UIButton添加了一个目标,但是未调用touch函数。 我试图在自定义视图类或视图控制器中添加目标。 但是,两者都不起作用。
我检查了什么;
isUserInteractionEnabled
都设置为true,并且所有视图都为true。 我检查了堆栈溢出中的每个答案,其中大多数都讨论了isUserInteraction和层次结构,我认为它们在我的情况下都是正确的。
我如何创建自定义视图并在其中添加按钮。
class TyreChangeScrollView: UIScrollView {
//E-Mail
let emailTitleLbl = BaseLabel()
let emailBgView = UIView()
let emailLbl = BaseLabel()
public let emailInfoBtn = UIButton()
let contentView: UIView = {
let v = UIView()
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
var shouldSetupConstraints = true
override init(frame: CGRect) {
super.init(frame: frame)
updateUI()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func updateUI(){
addSubview(contentView)
emailTitleLbl.translatesAutoresizingMaskIntoConstraints = false
emailTitleLbl.text = "E-POSTA ADRESİ"
emailTitleLbl.textAlignment = .left
contentView.addSubview(emailTitleLbl)
emailLbl.translatesAutoresizingMaskIntoConstraints = false
emailLbl.text = "hello@hello.com"
emailLbl.textAlignment = .left
emailInfoBtn.setImage(UIImage(named: "info"), for: .normal)
emailInfoBtn.isUserInteractionEnabled = true
emailBgView.backgroundColor = Color.Common.fieldBg
emailBgView.addSubview(emailLbl)
emailBgView.addSubview(emailInfoBtn)
contentView.addSubview(emailBgView)
}
override func updateConstraints() {
if(shouldSetupConstraints) {
// AutoLayout constraints
contentView.translatesAutoresizingMaskIntoConstraints = false
// constrain the scroll view to 8-pts on each side
contentView.anchor(self.topAnchor, left: self.leftAnchor, bottom: self.bottomAnchor, right: self.rightAnchor, topConstant: 0, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
contentView.widthAnchor.constraint(equalTo: self.widthAnchor, multiplier: 1.0).isActive = true
emailTitleLbl.anchor(phoneLbl.bottomAnchor, left: contentView.leftAnchor, bottom: nil, right: contentView.rightAnchor, topConstant: 10, leftConstant: 20, bottomConstant: 0, rightConstant: 16, widthConstant: 0, heightConstant: 0)
emailLbl.anchor(emailBgView.topAnchor, left: emailBgView.leftAnchor, bottom: emailBgView.bottomAnchor, right: nil, topConstant: 0, leftConstant: 15, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
emailInfoBtn.anchor(emailBgView.topAnchor, left: nil, bottom: emailBgView.bottomAnchor, right: emailBgView.rightAnchor, topConstant: 0, leftConstant: 0, bottomConstant: 0, rightConstant: 10, widthConstant: 0, heightConstant: 0)
emailBgView.anchor(emailTitleLbl.bottomAnchor, left: contentView.leftAnchor, bottom: nil, right: contentView.rightAnchor, topConstant: 10, leftConstant: 20, bottomConstant: 0, rightConstant: 16, widthConstant: 0, heightConstant: 50)
shouldSetupConstraints = false
}
super.updateConstraints()
}
}
我如何声明自定义类并将目标添加到UIButton。
class TyreChangeViewController: BaseViewController{
let scrollView = TyreChangeScrollView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
designUI()
scrollView.emailInfoBtn.addTarget(self, action: #selector(emailBtnTapped(_:)), for: UIControlEvents.touchUpInside)
scrollView.phoneInfoBtn.addTarget(self, action: #selector(phoneBtnTapped(_:)), for: UIControlEvents.touchUpInside)
}
override func viewWillAppear(_ animated: Bool) {
scrollView.anchor(topLayoutGuide.bottomAnchor, left: view.leftAnchor, bottom: bottomLayoutGuide.topAnchor, right: view.rightAnchor, topConstant: 10, leftConstant: 10, bottomConstant: 10, rightConstant: 10, widthConstant: 0, heightConstant: 0)
}
func designUI(){
view.backgroundColor = Color.Common.screenBgColor
scrollView.backgroundColor = Color.Common.screenBgWhite
view.addSubview(scrollView)
}
@objc func emailBtnTapped(_ sender: UIButton){
print("hello")
}}
编辑:如果我在内容视图中添加了高度限制,则按钮可以正常工作,但现在无法滚动。
contentView.heightAnchor.constraint(equalTo: self.heightAnchor, multiplier: 1.0).isActive = true
添加约束后,刷新布局是必须的
override func viewWillAppear(_ animated: Bool) {
scrollView.anchor(topLayoutGuide.bottomAnchor, left: view.leftAnchor, bottom: bottomLayoutGuide.topAnchor, right: view.rightAnchor, topConstant: 10, leftConstant: 10, bottomConstant: 10, rightConstant: 10, widthConstant: 0, heightConstant: 0)
self.view.layoutIfNeeded()
}
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