Ios 如何使用单独的UITableViewDataSource类管理#选择器?
我的Ios 如何使用单独的UITableViewDataSource类管理#选择器?,ios,swift,uitableview,nsobject,unrecognized-selector,Ios,Swift,Uitableview,Nsobject,Unrecognized Selector,我的UITableView import UIKit class CardDataSource: NSObject, UITableViewDataSource { //MARK:- Property var medialObjects: [MediaCardObject]? let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).f
UITableView
import UIKit
class CardDataSource: NSObject, UITableViewDataSource {
//MARK:- Property
var medialObjects: [MediaCardObject]?
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
var viewController: AddNewVC?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return medialObjects?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let obj = medialObjects![indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "MediaTextTableViewCell") as! MediaTextTableViewCell
cell.btnDelete.tag = indexPath.row
cell.btnDelete.addTarget(self, action: #selector(AddNewVC.deleteItem(sender:)), for: .touchUpInside)
cell.tfCardText.text = obj.path
cell.tfCardText.tag = indexPath.row
cell.tfCardText.returnKeyType = .done
cell.tfCardText.delegate = viewController
cell.selectionStyle = .none
return cell
}
}
在我的UITableView
上加载数据很好,但问题是当我单击“删除”按钮时,它崩溃并显示
***由于未捕获异常“NSInvalidArgumentException”而终止应用程序,原因:'-[MediaCards.CardDataSource
deleteItemWithSender::发送到实例的选择器无法识别
0x600003394cc0'
我也试过了
cell.btnDelete.addTarget(self, action: #selector(viewController?.deleteItem(sender:)), for: .touchUpInside)
以下是AddNewVC
//MARK:- Delete
@objc func deleteItem(sender: UIButton) {
let selectedIndex = sender.tag
deleteObjectIndexPath = IndexPath(row: selectedIndex, section: 0)
confirmDelete()
}
在AddNewVC
类中
var tblDataSource = CardDataSource()
override func viewDidLoad() {
super.viewDidLoad()
tblDataSource.viewController = self
tblMediaCards.dataSource = tblDataSource
if forEdit {
let cards = mediaObject?.cards?.allObjects as! [MediaCard]
for obj in cards {
let mediaCardObj = MediaCardObject.init(type: obj.type ?? "", path: obj.path ?? "", index: Int(obj.index))
self.medialObjects.append(mediaCardObj)
}
medialObjects = medialObjects.sorted(by: { $0.index! < $1.index! })
tblDataSource.medialObjects = medialObjects
self.tblMediaCards.reloadData()
}
}
var tblDataSource=CardDataSource()
重写func viewDidLoad(){
super.viewDidLoad()
tblDataSource.viewController=self
tblMediaCards.dataSource=tblDataSource
如果forEdit{
让cards=mediaObject?.cards?.AllObject为![MediaCard]
用于卡中的obj{
让mediaCardObj=MediaCardObject.init(类型:obj.type??,路径:obj.path??,索引:Int(obj.index))
self.medialObjects.append(mediaCardObj)
}
medialObjects=medialObjects.sorted(按:{$0.index!<$1.index!})
tblDataSource.medialObjects=medialObjects
self.tblMediaCards.reloadData()
}
}
但它仍然因为同样的原因崩溃。尽管代理工作正常。目标错误:
cell.btnDelete.addTarget(self, action: #selector(AddNewVC.deleteItem(sender:)), for: .touchUpInside)
方法AddNewVC.deleteItem(发件人:)
不是self
的一部分,而是另一个类成员的一部分。尝试:
cell.btnDelete.addTarget(self.viewController, action: #selector(AddNewVC.deleteItem(sender:)), for: .touchUpInside)
为了安全起见,我宁愿在同一个viewcontroller中有一个target方法,然后调用datasource/subviewcontroller方法 deleteitem方法在哪里?你能给我们看看吗?当然。问题更新你是对的。我错过了。谢谢你的帮助。:)