在init函数中,#selector似乎找不到调用函数。
这是班上
import UIKit
protocol ExpandableHeaderViewDelegate {
func toggleSection(header: ExpandableHeaderView, section: Int)
}
class ExpandableHeaderView: UITableViewHeaderFooterView {
var delegate: ExpandableHeaderViewDelegate?
var section: Int!
@IBOutlet weak var titleLabel: UILabel!
override init(reuseIdentifier: String?){
super.init(reuseIdentifier: reuseIdentifier)
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderView(_:))))
}
@objc func selectHeaderView(gesture: UITapGestureRecognizer){
let cell = gesture.view as! ExpandableHeaderView
delegate?.toggleSection(header: self, section: cell.section)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderView(_:))))
}
func custonInt(title: String, section: Int, delegate: ExpandableHeaderViewDelegate){
self.titleLabel.text = title
self.section = section
self.delegate = delegate
}
override func layoutSubviews(){
super.layoutSubviews()
self.titleLabel.textColor = UIColor.white
self.contentView.backgroundColor = UIColor.darkGray
}
}
这是错误:
Use of unresolved identifier 'selectHeaderView'
init函数添加手势识别器找不到selectHeaderView。它的表现就好像它不是课程的一部分。我在做什么错了?
答案 0 :(得分:1)
更改此:
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderView(_:))))
收件人:
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderView(gesture:))))
答案 1 :(得分:0)
您的类确实没有名为selectHeaderView(_:)
的方法。 selectHeaderView(_:)
。但是,您的课程确实具有方法selectHeaderView(gesture:)
。在这种情况下,参数标签确实很重要。 _:
表示没有外部参数标签。
您应该写
#selector(selectHeaderView(gesture:))
您还可以让Swift决定参数标签
#selector(selectHeaderView)