如何在swift 3中的不同部分下显示多维数组
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【中文标题】如何在swift 3中的不同部分下显示多维数组【英文标题】：How to display a multidimensional array under different sections in swift 3 【发布时间】：2017-09-20 15:55:57 【问题描述】：我一直在尝试创建多维数组并在每个部分下显示每个数组..但我一直以超出范围的致命错误索引结束。我在下面显示的代码是我如何访问我的 firebase 数据并从数据库中打印每个数组。问题是我得到了我分配给它的数组的数据，但由于错误似乎无法显示它。希望有人帮助参考我附上屏幕截图的错误。
@IBOutlet weak var tableview: UITableView!
var yourArray = [String]()
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
var sundaycoursenamearray = [String]()
var sundaycoursecodearray = [String]()
var sundaycourselocationarray = [String]()
var sundayfromarray = [String]()
var sundaytoarray = [String]()
var mondaycoursenamearray = [String]()
var mondaycoursecodearray = [String]()
var mondaycourselocationarray = [String]()
var mondayfromarray = [String]()
var mondaytoarray = [String]()
var tuesdaycoursenamearray = [String]()
var tuesdaycoursecodearray = [String]()
var tuesdaycourselocationarray = [String]()
var tuesdayfromarray = [String]()
var tuesdaytoarray = [String]()
var wednesdaycoursenamearray = [String]()
var wednesdaycoursecodearray = [String]()
var wednesdaycourselocationarray = [String]()
var wednesdayfromarray = [String]()
var wednesdaytoarray = [String]()
var thursdaycoursenamearray = [String]()
var thursdaycoursecodearray = [String]()
var thursdaycourselocationarray = [String]()
var thursdayfromarray = [String]()
var thursdaytoarray = [String]()
var fridaycoursenamearray = [String]()
var fridaycoursecodearray = [String]()
var fridaycourselocationarray = [String]()
var fridayfromarray = [String]()
var fridaytoarray = [String]()
var saturdaycoursenamearray = [String]()
var saturdaycoursecodearray = [String]()
var saturdaycourselocationarray = [String]()
var saturdayfromarray = [String]()
var saturdaytoarray = [String]()
var coursecodes = [[String]]()
var coursenames = [[String]]()
var courselocations = [[String]]()
var fromtimes = [[String]]()
var totimes = [[String]]()
var days = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]
override func viewWillAppear(_ animated: Bool)
let uid = Auth.auth().currentUser?.uid
if(uid == nil)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let nextviewController = storyboard.instantiateViewController(withIdentifier: "loginscreen")
//self.present(profileViewController, animated: true, completion: nil)
self.present(nextviewController, animated: true, completion: nil)
for j in days
for i in 1 ..< 10
let ref1 = Database.database().reference().child("users").child((uid)!).child("courses").child(j).child(String(i))
ref1.observeSingleEvent(of: .value, with: snapshot in
if let dictionary = snapshot.value as? [String: AnyObject]
// print(dictionary)
if j == "Sunday"
if let points = dictionary["coursname"] as? String
self.sundaycoursecodearray.append(points)
print(self.sundaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.sundaycoursenamearray.append(points1)
print(self.sundaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.sundaycourselocationarray.append(points1)
print(self.sundaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.sundayfromarray.append(points1)
print(self.sundayfromarray)
if let points1 = dictionary["totime"] as? String
self.sundaytoarray.append(points1)
print(self.sundaytoarray)
if j == "Monday"
if let points = dictionary["coursname"] as? String
self.mondaycoursecodearray.append(points)
print(self.mondaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.mondaycoursenamearray.append(points1)
print(self.mondaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.mondaycourselocationarray.append(points1)
print(self.mondaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.mondayfromarray.append(points1)
print(self.mondayfromarray)
if let points1 = dictionary["totime"] as? String
self.mondaytoarray.append(points1)
print(self.mondaytoarray)
if j == "Tuesday"
if let points = dictionary["coursname"] as? String
self.tuesdaycoursecodearray.append(points)
print(self.tuesdaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.tuesdaycoursenamearray.append(points1)
print(self.tuesdaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.tuesdaycourselocationarray.append(points1)
print(self.tuesdaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.tuesdayfromarray.append(points1)
print(self.tuesdayfromarray)
if let points1 = dictionary["totime"] as? String
self.tuesdaytoarray.append(points1)
print(self.tuesdaytoarray)
if j == "Wednesday"
if let points = dictionary["coursname"] as? String
self.wednesdaycoursecodearray.append(points)
print(self.wednesdaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.wednesdaycoursenamearray.append(points1)
print(self.wednesdaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.wednesdaycourselocationarray.append(points1)
print(self.wednesdaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.wednesdayfromarray.append(points1)
print(self.wednesdayfromarray)
if let points1 = dictionary["totime"] as? String
self.wednesdaytoarray.append(points1)
print(self.wednesdaytoarray)
if j == "Thursday"
if let points = dictionary["coursname"] as? String
self.thursdaycoursecodearray.append(points)
print(self.thursdaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.thursdaycoursenamearray.append(points1)
print(self.thursdaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.thursdaycourselocationarray.append(points1)
print(self.thursdaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.thursdayfromarray.append(points1)
print(self.thursdayfromarray)
if let points1 = dictionary["totime"] as? String
self.thursdaytoarray.append(points1)
print(self.thursdaytoarray)
if j == "Friday"
if let points = dictionary["coursname"] as? String
self.fridaycoursecodearray.append(points)
print(self.fridaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.fridaycoursenamearray.append(points1)
print(self.fridaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.fridaycourselocationarray.append(points1)
print(self.fridaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.fridayfromarray.append(points1)
print(self.fridayfromarray)
if let points1 = dictionary["totime"] as? String
self.fridaytoarray.append(points1)
print(self.fridaytoarray)
if j == "Saturday"
if let points = dictionary["coursname"] as? String
self.saturdaycoursecodearray.append(points)
print(self.saturdaycoursecodearray)
if let points1 = dictionary["coursecode"] as? String
self.saturdaycoursenamearray.append(points1)
print(self.saturdaycoursenamearray)
if let points1 = dictionary["courseroomlocation"] as? String
self.saturdaycourselocationarray.append(points1)
print(self.saturdaycourselocationarray)
if let points1 = dictionary["fromtime"] as? String
self.saturdayfromarray.append(points1)
print(self.saturdayfromarray)
if let points1 = dictionary["totime"] as? String
self.saturdaytoarray.append(points1)
print(self.saturdaytoarray)
self.coursecodes.append(self.sundaycoursenamearray)
self.coursecodes.append(self.mondaycoursenamearray)
self.coursecodes.append(self.tuesdaycoursenamearray)
self.coursecodes.append(self.wednesdaycoursenamearray)
self.coursecodes.append(self.thursdaycoursenamearray)
self.coursecodes.append(self.fridaycoursenamearray)
self.coursecodes.append(self.saturdaycoursenamearray)
self.coursenames.append(self.sundaycoursecodearray)
self.coursenames.append(self.mondaycoursecodearray)
self.coursenames.append(self.tuesdaycoursecodearray)
self.coursenames.append(self.wednesdaycoursecodearray)
self.coursenames.append(self.thursdaycoursecodearray)
self.coursenames.append(self.fridaycoursecodearray)
self.coursenames.append(self.saturdaycoursecodearray)
self.courselocations.append(self.sundaycourselocationarray)
self.courselocations.append(self.mondaycourselocationarray)
self.courselocations.append(self.tuesdaycourselocationarray)
self.courselocations.append(self.wednesdaycourselocationarray)
self.courselocations.append(self.thursdaycourselocationarray)
self.courselocations.append(self.fridaycourselocationarray)
self.courselocations.append(self.saturdaycourselocationarray)
self.fromtimes.append(self.sundayfromarray)
self.fromtimes.append(self.mondayfromarray)
self.fromtimes.append(self.tuesdayfromarray)
self.fromtimes.append(self.wednesdayfromarray)
self.fromtimes.append(self.thursdayfromarray)
self.fromtimes.append(self.fridayfromarray)
self.fromtimes.append(self.saturdayfromarray)
self.totimes.append(self.sundaytoarray)
self.totimes.append(self.mondaytoarray)
self.totimes.append(self.tuesdaytoarray)
self.totimes.append(self.wednesdaytoarray)
self.totimes.append(self.thursdaytoarray)
self.totimes.append(self.fridaytoarray)
self.totimes.append(self.saturdaytoarray)
self.tableview.reloadData()
)
super.viewWillAppear(animated)
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?
return days[section]
func numberOfSections(in tableView: UITableView) -> Int
// #warning Incomplete implementation, return the number of sections
return days.count
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
// #warning Incomplete implementation, return the number of rows
return coursenames[section].count
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! homeTableViewCell
// Configure the cell...
// cell.classcode?.text = sundaycoursenamearray[indexPath.section]
cell.classcode?.text = coursenames[indexPath.section][indexPath.row]
return cell
/*
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool
// Return false if you do not want the specified item to be editable.
return true
*/
/*
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath)
if editingStyle == .delete
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
else if editingStyle == .insert
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
*/
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath)
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool
// Return false if you do not want the item to be re-orderable.
return true
*/
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
*/
override func viewDidLoad()
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
【问题讨论】：
错误是“索引超出范围”。我没有检查，但可能是days.count != coursenames.count，所以你不能做一个coursenames[i]，其中我是您应该为您的数据创建一个模型，然后创建包含该模型的数组。
你可以像这样创建一个简单的结构：
struct Course
var name : String?
var code: String?
var location: String?
var toTime: String?
var fromTime: String?
创建模型后，您可以创建一个包含此类结构的数组。
对于 numberOfRowsInSection，您也不必使用下标。只需返回：
return coursenames.count
这就是你得到错误的原因。
【讨论】：
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