所以，我有一个带有 UITableView 的 ViewController(PledgeViewController) 和另一个名为 PledgeTableViewCell.swift 的文件，它是一个 UITableCell 文件。当有人单击 PledgeTableViewCell.swift 中的按钮 (plsBtn) 时，我设置了一个闭包，该闭包反馈到 PledgeViewController 中，然后我从那里处理我的操作。我现在想做的是：
当有人单击 PledgeTableViewCell 中的 plsBtn 时，我正在 PledgeViewController 中处理该操作。但我想在该 indexPath 处读取 TableViewCell 中标签的值，并将其发送到 PledgeViewController 以进行进一步计算。我可以用闭包本身来做到这一点还是有另一种方法？谢谢！
PledgeTableViewCell.swift：
import UIKit
import Firebase
import FirebaseDatabase
class PledgeTableViewCell: UITableViewCell {
var plusBtnAction: ((Any) -> Void)?
var minusBtnAction: ((Any) -> Void)?
@IBOutlet weak var rewardAmtLabel: UILabel!
@IBOutlet weak var ticketClasslabel: UILabel!
@IBOutlet weak var ticketDescLabel: UILabel!
@IBOutlet weak var ticketCountLabel: UILabel!
@IBOutlet weak var plusBtn: UIButton!
@IBOutlet weak var minusBtn: UIButton!
var ref: DatabaseReference!
var currentID = ""
var ticket_count: Int = 0
let userID = Auth.auth().currentUser!.uid
@IBAction func minusBtn(_ sender: Any) {
if var tickCount = Int(ticketCountLabel.text!) {
if(tickCount > 0)
{
tickCount -= 1
ticketCountLabel.text = String(tickCount)
}
}
self.minusBtnAction?(sender)
}
@IBAction func plusBtn(_ sender: AnyObject) {
if var tickCount = Int(ticketCountLabel.text!) {
//I WANT TO SEND THIS 'TICKCOUNT' TO THE PLEDGEVIEWCONTROLLER
tickCount += 1
ticketCountLabel.text = String(tickCount)
}
self.plusBtnAction?(sender)
}
}
PledgeViewController.swift：
import UIKit
import Foundation
import FirebaseDatabase
import Firebase
class PledgeViewController: UIViewController, UITableViewDataSource, UITableViewDelegate{
var getID: String!
var rewards = [Rewards]()
var ticket_count: Int = 0
var ref: DatabaseReference!
let userID = Auth.auth().currentUser!.uid
var rewardID: String!
@IBOutlet weak var pledgeAmtLabel: UILabel!
@IBOutlet weak var RewardChooseTable: UITableView!
@IBAction func pledgeBtn(_ sender: Any) {
//get the text from the label and run all the checks to see if the tickets are available
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
/* myIndex = indexPath.row
finalId = idTable[myIndex]
let story = stories[indexPath.row]
ArtcallID = story.id
performSegue(withIdentifier: "singleArtcall", sender: self)
*/
let reward = rewards[indexPath.row]
let id = reward.rewardID
reward.countUp()
print("The reward that was touched is: " + id )
print("One of the buttons were touched")
}
let RewardRef = Database.database().reference().child("Rewards")
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return rewards.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TakePledgeCell", for: indexPath) as! PledgeTableViewCell
let reward = rewards[indexPath.row]
cell.reward = reward
cell.currentID = getID
rewardID = reward.rewardID
cell.plusBtnAction = { sender in
let reward = self.rewards[indexPath.row]
cell.reward = reward
let local_id = reward.rewardID
self.ref=Database.database().reference().child("Fund_Project_Request").child(self.getID).child(self.userID).child(local_id).child("Ticket_count")
self.ref.observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
if snapshot.value is NSNull{
self.ticket_count = 0
self.ticket_count += 1
self.ref.setValue(self.ticket_count)
}
else{
self.ticket_count = snapshot.value as! Int
self.ticket_count += 1
self.ref.setValue(self.ticket_count)
}
}) { (error) in
print(error.localizedDescription)
}
Database.database().reference().child("Rewards").child(self.getID).child(local_id).child("reward_ticket_amount").observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let reward_amt = snapshot.value as! Int
self.pledgeAmtLabel.text = String(reward_amt)
}) { (error) in
print(error.localizedDescription)
}
// Do whatever you want from your button here.
}
cell.minusBtnAction = { sender in
let reward = self.rewards[indexPath.row]
cell.reward = reward
let local_id = reward.rewardID
self.ref=Database.database().reference().child("Fund_Project_Request").child(self.getID).child(self.userID).child(local_id).child("Ticket_count")
self.ref.observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
if snapshot.value is NSNull{
}
else{
self.ticket_count = snapshot.value as! Int
if(self.ticket_count != 0)
{
self.ticket_count -= 1
self.ref.setValue(self.ticket_count)
}
}
}) { (error) in
print(error.localizedDescription)
}
}
return cell
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
RewardRef.child(getID).observe(.value, with: { (snapshot) in
self.rewards.removeAll()
for child in snapshot.children {
let childSnapshot = child as! DataSnapshot
let reward = Rewards(snapshot: childSnapshot)
self.rewards.insert(reward, at: 0)
}
self.RewardChooseTable.reloadData()
})
}
override func viewDidLoad() {
super.viewDidLoad()
print("The id received from the SingleViewControl is:" + getID)
}
}
您可以在闭包本身中与发件人一起传递标签值。
class PledgeTableViewCell: UITableViewCell {
var plusBtnAction: ((String) -> Void)?
var minusBtnAction: ((String) -> Void)?
@IBAction func minusBtn(_ sender: Any) {
if var tickCount = Int(ticketCountLabel.text!) {
if(tickCount > 0)
{
tickCount -= 1
ticketCountLabel.text = String(tickCount)
}
self.minusBtnAction?(tickCount)
}
}
@IBAction func plusBtn(_ sender: AnyObject) {
if var tickCount = Int(ticketCountLabel.text!) {
//I WANT TO SEND THIS 'TICKCOUNT' TO THE PLEDGEVIEWCONTROLLER
tickCount += 1
ticketCountLabel.text = String(tickCount)
self.plusBtnAction?(ticketCount)
}
}
}
在cellForRow:方法中PledgeViewController
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TakePledgeCell", for: indexPath) as! PledgeTableViewCell
.....
cell.plusBtnAction = { labelText in
//handle labelText here
}
}
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