Swift #选择器未解析标识符函数
在init函数中#选择器似乎找不到调用函数 这是上课时间Swift #选择器未解析标识符函数,swift,Swift,在init函数中#选择器似乎找不到调用函数 这是上课时间 import UIKit protocol ExpandableHeaderViewDelegate { func toggleSection(header: ExpandableHeaderView, section: Int) } class ExpandableHeaderView: UITableViewHeaderFooterView { var delegate: ExpandableHeaderViewDelegate?
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
}
}
以下是错误:
Use of unresolved identifier 'selectHeaderView'
init函数添加手势识别器找不到selectHeaderView。它的行为就好像它不是班级的一部分。我做错了什么?更改此选项:
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderView(_:))))
致:
您的类确实没有名为
selectHeaderView(:)
的方法<代码>选择HeaderView(:)。但是,您的类确实有一个方法selectHeaderView(手势:)
。在这种情况下,参数标签很重要<代码>\:表示没有外部参数标签
你应该写
#selector(selectHeaderView(gesture:))
您还可以让Swift决定参数标签
#selector(selectHeaderView)
或者只需#选择器(selectHeaderView)
#selector(selectHeaderView)