Ios 自定义单元格中的按钮操作不调用委托函数
我在视图的文件所有者中使用此代码,该视图在我的表视图中用作自定义单元格:Ios 自定义单元格中的按钮操作不调用委托函数,ios,swift,xcode,Ios,Swift,Xcode,我在视图的文件所有者中使用此代码,该视图在我的表视图中用作自定义单元格: import UIKit protocol PostCellViewDelegate: class { func postSettingsAction() } class PostCellView: UITableViewCell { weak var delegate: PostCellViewDelegate? @IBAction func postSettingsClicked(_
import UIKit
protocol PostCellViewDelegate: class {
func postSettingsAction()
}
class PostCellView: UITableViewCell {
weak var delegate: PostCellViewDelegate?
@IBAction func postSettingsClicked(_ sender: UIButton) {
delegate?.postSettingsAction()
print("here2")
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let _ = commonInitialization()
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
let _ = commonInitialization()
}
func customise(imageName : String , color : UIColor, logoLabelValue : String, websiteValue: String)
{
}
func commonInitialization() -> UIView
{
let bundle = Bundle.init(for: type(of: self))
let nib = UINib(nibName: "PostCellView", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
view.frame = bounds
view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
addSubview(view)
return view
}
}
import UIKit
class ViewController: UIViewController, PostCellViewDelegate, UITableViewDataSource, UITableViewDelegate {
func postSettingsAction() {
print("hi there")
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 4
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = PostCellView(style: UITableViewCellStyle.default , reuseIdentifier: "Cell")
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 170
}
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
在具有表视图的视图控制器中:
import UIKit
protocol PostCellViewDelegate: class {
func postSettingsAction()
}
class PostCellView: UITableViewCell {
weak var delegate: PostCellViewDelegate?
@IBAction func postSettingsClicked(_ sender: UIButton) {
delegate?.postSettingsAction()
print("here2")
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let _ = commonInitialization()
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
let _ = commonInitialization()
}
func customise(imageName : String , color : UIColor, logoLabelValue : String, websiteValue: String)
{
}
func commonInitialization() -> UIView
{
let bundle = Bundle.init(for: type(of: self))
let nib = UINib(nibName: "PostCellView", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
view.frame = bounds
view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
addSubview(view)
return view
}
}
import UIKit
class ViewController: UIViewController, PostCellViewDelegate, UITableViewDataSource, UITableViewDelegate {
func postSettingsAction() {
print("hi there")
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 4
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = PostCellView(style: UITableViewCellStyle.default , reuseIdentifier: "Cell")
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 170
}
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
正如在单击按钮时所预期的那样,代理应该调用postSettingsAction(),但是这不会发生。这里可能有什么问题,我应该如何纠正?您尚未将代理分配给视图控制器。您需要在
tableView(\utableview:UITableView,cellForRowAt indexath:indexPath)中设置委托方法:
此外,在初始化单元时,我们应使用可重用性,包括:
let cell = tableView.dequeueReusableCell(withIdentifier:"Cell") as! PostCellView
将您的方法更新为:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier:"Cell") as! PostCellView
cell.delegate = self // Assign delegate
return cell
}
您需要满足委托人的要求。只有这样,你才能接到电话。所以加上
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = PostCellView(style: UITableViewCellStyle.default , reuseIdentifier: "Cell")
cell.delegate = self
return cell
}
您忘记为单元格设置委托。cell.delegate=self在tableView(:,cellForRowAt:)中,您在ViewController中设置的self
?请阅读,然后您的问题显示了演示问题的最低代码谢谢@Sh_Khan,我错过了这一部分。