我创建一个应用程序只是为了学习这门语言。基本上我正试图制作一个应用程序，允许你打赌CSGO团队将获胜的假钱。所以现在我在应用程序的一部分，允许用户创建一个赌注。然后用户可以看到他可以接受另一个用户下注的所有赌注。我以前做过这一切，但我注意到了一个bug，所以我决定修复它。问题是它现在崩溃了。
我需要该应用程序转到另一个屏幕，允许您在团队中下注。然后单击该框并设置您希望在该特定团队上下注多少。然后，当您点击底部的提交Button时，它会将用户信息和投注信息上传到Firebase Database。然后它将返回上一个屏幕，显示尚未填充的所有投注。所以他也应该这样。
问题是，当我使用POPView控制器返回上一个显示投注的视图控制器时，它为表视图提供了一个索引超出范围的错误。奇怪的是，如果我将方法getBetsFor移动到viewDidLoad而不是视图会出现，那么它的工作正常。问题是它会出现故障并且不会显示用户刚刚做出的赌注。
我知道我的代码很可怕我曾尝试将其中的一部分放入MVC格式，但我的代码没有进一步说明。
下面的代码是从Firebase Database获取赌注的代码，然后将该数据放入对象数组中，然后将对象显示在TableView
//
// BetView.swift
// EDraft
//
// Created by Devin Tripp on 3/20/17.
// Copyright © 2017 Devin Tripp. All rights reserved.
//
import UIKit
import Foundation
import Firebase
class BetView: UIViewController, UITableViewDelegate, UITableViewDataSource{
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var teamOne: UILabel!
@IBOutlet weak var teamTwo: UILabel!
let datRef = FIRDatabase.database().reference(fromURL: "https://edraft-77b47.firebaseio.com/")
var userMoney = String()
let getData = GatherData()
var testies: String?
var teamTOne = String()
var teamTTwo = String()
let screenSize: CGRect = UIScreen.main.bounds
let navBar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 60, width: UIScreen.main.bounds.width, height: 50))
var navItem = UINavigationItem(title: "Money: ")
let doneItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.add, target: nil, action: #selector(sayHello(sender:)))
let backItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.done, target: nil, action: #selector(goBack(sender:)))
override func viewWillAppear(_ animated: Bool) {
self.getData.betObjects.removeAll()
self.getData.getBetsFor(completion: { (result) in
if result == true {
//show the spinning wheel thing
self.tableView.reloadData()
} else {
// error
}
})
}
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(navBar)
self.tableView.separatorStyle = .none
navItem.rightBarButtonItem = doneItem
navItem.leftBarButtonItem = backItem
navBar.setItems([navItem], animated: false)
teamOne.text = teamTOne
teamTwo.text = teamTTwo
/*
getData.getBetsFor(completion: { (result) in
if result == true {
self.tableView.reloadData()
} else {
}
})
*/
getData.getMoneyFromUser(username: self.getData.userName, completion: { (money) in
if money == true {
let usermoney = String(self.getData.userMoney)
//update the UI
self.navItem.title = "$" + usermoney
print(self.getData.userMoney)
} else {
print("no money found")
}
})
}
func tableView(_ tableView: UITableView, shouldUpdateFocusIn context: UITableViewFocusUpdateContext) -> Bool {
return true
}
func updateBet(_ index: Int, completion: @escaping (_ something: Bool) -> Void) {
let userID = FIRAuth.auth()?.currentUser?.uid
datRef.child("User").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let value = snapshot.value as? NSDictionary
let username = value?["username"] as? String
self.getData.userName = username!
// ...
self.datRef.child("Bets").observe(.childAdded, with: { snapshot in
//
// this is the unique identifier of the bet. eg, -Kfx81GvUxoHpmmMwJ9P
guard let dict = snapshot.value as? [String: AnyHashable] else {
print("failed to get dictionary from Bets.\(self.getData.userName)")
return
}
let values = ["OpposingUsername": self.getData.userName,"Show": "no"]
//var val = self.getData.betObjects[index]
//val.opposingUserName = self.getData.userName
self.datRef.child("Bets").child(self.getData.tieBetToUser[index]).observeSingleEvent(of: .value, with: { (snapshot) in
let anothaValue = snapshot.value as? NSDictionary
let user = anothaValue?["Username"] as? String
if user == self.getData.userName {
// let the user know he cannot bet his own bet
completion(false)
} else {
self.datRef.child("Bets").child(self.getData.tieBetToUser[index]).updateChildValues(values)
completion(true)
}
})
})
}) { (error) in
print(error.localizedDescription)
}
}
func getOpoosingUserNames(_ username: String,_ index: Int, completion: @escaping (_ result: Bool) -> Void ) {
let userID = FIRAuth.auth()?.currentUser?.uid
datRef.child("User").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let value = snapshot.value as? NSDictionary
let username = value?["username"] as? String ?? ""
self.datRef.child("Bets").child(self.getData.tieBetToUser[index]).observeSingleEvent(of: .value, with: { snapshot in
let thisValue = snapshot.value as? NSDictionary
if let thisUserName = thisValue?["Username"] as? String {
self.getData.opposingUserName = thisUserName
completion(true)
} else {
completion(false)
}
})
}) { (error) in
print(error.localizedDescription)
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//if makeEmpty == true {
// return 0
//} else {
print(self.getData.betObjects.count)
return self.getData.betObjects.count
//}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCell(withIdentifier: "cellB", for: indexPath) as! CellB
print(self.getData.betObjects[indexPath.row].userName)
cell.userNameLabel?.text = getData.betObjects[indexPath.row].userName
cell.amountOfBet?.text = getData.betObjects[indexPath.row].betAmount
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let alertController = UIAlertController(title: "Accept Bet", message: "Match the bet of " + getData.amountBets[indexPath.row], preferredStyle: .alert)
let okButton = UIAlertAction(title: "No", style: .default, handler: { (action) -> Void in
print("Ok button tapped")
})
let yesButton = UIAlertAction(title: "Yes", style: .default, handler: { (action) -> Void in
// let them know to wait a second or the bet won't go through
var waitController = UIAlertController(title: "Please Wait", message: "Your bet is being processed", preferredStyle: .alert)
self.present(waitController, animated: true, completion: nil)
//take away the usersMoney
self.takeAwayMoney(self.getData.amountBets[indexPath.row],index: indexPath.row, completion: { (result) in
if result == true {
self.updateBet(indexPath.row, completion: { (result) in
if result == true {
self.getOpoosingUserNames(self.getData.userName, indexPath.row, completion: { (anothaResult) in
if anothaResult == true {
self.dismiss(animated: true, completion: {
let successController = UIAlertController(title: "Success", message: "You have made a bet with " + self.getData.opposingUserName, preferredStyle: .alert)
let okButt = UIAlertAction(title: "Ok", style: .default, handler: nil)
successController.addAction(okButt)
self.present(successController, animated: true, completion: nil)
//lastly delete the opposing UserName
let pathIndex = IndexPath(item: indexPath.row, section: 0)
self.getData.betObjects.remove(at: indexPath.row)
self.tableView.deleteRows(at: [pathIndex], with: .fade)
self.tableView.reloadData()
print("Second")
})
self.getData.getMoneyFromUser(username: self.getData.userName, completion: { (money) in
if money == true {
self.userMoney = String(self.getData.userMoney)
//update the UI
self.navItem.title = "$" + self.userMoney
print(self.userMoney)
} else {
print("no money found")
}
})
} else {
}
//wait for the first view to load in case it uploads to fast
})
} else {
self.dismiss(animated: true, completion: {
let cannotBet = UIAlertController(title: "Failed", message: "You cannot bet with yourself dummy", preferredStyle: .alert)
let okButt = UIAlertAction(title: "Ok", style: .default, handler: nil)
cannotBet.addAction(okButt)
self.present(cannotBet, animated: true, completion: nil)
})
}
})
} else {
// user doesn't have money
//display a alert that lets the user know hes broke
print("this should print once")
self.dismiss(animated: true, completion: {
let brokeController = UIAlertController(title: "Failed", message: "Reason: You don't have enough money!", preferredStyle: .alert)
let okButt = UIAlertAction(title: "Ok", style: .default, handler: nil)
brokeController.addAction(okButt)
self.present(brokeController, animated: true, completion: nil)
})
}
var getResult = ""
print("You have taken away the users money")
print("you made it this far almost there")
//let delayInSeconds = 3.0 // 1
//DispatchQueue.main.asyncAfter(deadline: .now() + delayInSeconds) { // 2
})
return
})
alertController.addAction(okButton)
alertController.addAction(yesButton)
present(alertController, animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if(editingStyle == UITableViewCellEditingStyle.delete) {
self.getData.betObjects.remove(at: indexPath.row)
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
//let indexPath = self.tableView.indexPathForSelectedRow!
//var DestViewController : addBets = segue.destination as! addBets
//DestViewController.teamOne = self.teamOne.text!
//DestViewController.teamOne = self.teamTTwo
if segue.identifier == "gotobetview" {
if let destination = segue.destination as? addBets {
destination.teamOne = self.teamOne.text!
destination.teamTwo = self.teamTwo.text!
}
}
}
func takeAwayMoney(_ howMuch: String, index: Int, completion: @escaping (Bool)-> ()) -> Void{
if let notMuch = Int(howMuch) {
let userID = FIRAuth.auth()?.currentUser?.uid
datRef.child("User").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let value = snapshot.value as? NSDictionary
let money = value?["money"] as? String ?? ""
//convert money to int
if let conMoney = Int(money) {
var conMoreMoney = conMoney
if conMoreMoney < notMuch {
print(" You don't have enough money")
completion(false)
return
} else {
conMoreMoney -= notMuch
let values = ["money": String(conMoreMoney)]
//update the users money
self.datRef.child("User").child(userID!).updateChildValues(values)
completion(true)
}
}
// ...
}) { (error) in
print(error.localizedDescription)
}
}
}
func getUserName() -> String {
let userID = FIRAuth.auth()?.currentUser?.uid
var useruser: String!
datRef.child("User").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let value = snapshot.value as? NSDictionary
let username = value?["username"] as? String ?? ""
self.getData.userName = username
useruser = username
// ...
}) { (error) in
print(error.localizedDescription)
}
return useruser
}
func sayHello(sender: UIBarButtonItem) {
let userInput = self.teamOne.text
var userInputArray: [String] = []
userInputArray.append(self.teamOne.text!)
userInputArray.append(self.teamTwo.text!)
performSegue(withIdentifier: "gotobetview", sender: userInputArray)
//let storyboard = UIStoryboard(name: "Main", bundle: nil)
//let homeView = storyboard.instantiateViewController(withIdentifier: "addBets")
//self.present(homeView, animated: true, completion: nil)
}
func goBack(sender: UIBarButtonItem) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let backView = storyboard.instantiateViewController(withIdentifier: "tabview")
self.present(backView, animated: true, completion: nil)
}
}
由于我无法再发布代码，我将在github上更新项目并在此处发布链接。
https://github.com/devintrippprojects/EDraft
如果您下载项目，您可以随时创建自己的帐户，您将以100美元开始，或者您可以使用主要测试帐户，电子邮件是 k@k.com 密码是 KKKKKK
我将发布数据库的外观以及明天应用程序的外观，感谢您度过一个美好的夜晚。
答案 0 :(得分：1)
我下载并运行了你的项目。
这里的问题似乎是你应该在删除所有数据源时重新加载tableView。
改变这个：
self.getData.betObjects.removeAll()
self.getData.getBetsFor(completion: { (result) in
if result == true {
//show the spinning wheel thing
self.tableView.reloadData()
} else {
// error
}
})
到此：
self.getData.betObjects.removeAll()
self.tableView.reloadData()
self.getData.getBetsFor(completion: { (result) in
if result == true {
//show the spinning wheel thing
self.tableView.reloadData()
} else {
// error
}
})
额外的一行：
self.tableView.reloadData()