Question

我让tableView在一段时间内填充，但随后对我如何从Parse获取数据进行了一些调整，从那以后我无法显示我的tableView而不会因致命错误而崩溃：数组索引超出范围 这是我的代码：

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var vaccineEntry: Array<Array<Dictionary<String,String>>> = [[
    ["name" : "Rabies 1-yr", "detail": "None"],
    ["name" : "Rabies 3-yr", "detail": "None"],
    ["name" : "Distemper", "detail": "None"],
    ["name" : "Parvovirus", "detail": "None"],
    ["name" : "Adenovirus", "detail": "None"]],
  [
    ["name" : "Parainfluenza", "detail": "None"],
    ["name" : "Bordetella", "detail": "None"],
    ["name" : "Lyme Disease", "detail": "None"],
    ["name" : "Leptospirosis", "detail": "None"],
    ["name" : "Canine Influenza", "detail": "None"]
  ]]

var sections = ["Core Vaccines", "Non-Core Vaccines"]
var titles = [["Rabies 1-yr", "Rabies 3-yr", "Distemper", "Parvovirus", "Adenovirus"], ["Parainfluenza", "Bordetella", "Lyme Disease", "Leptospirosis", "Canine Influenza"]]


var textCellIdenifier = "vaccineCell"

// Section Headers
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {

    return self.sections[section]
}

func numberOfSectionsInTableView(tableView: UITableView) -> Int {

    return self.sections.count

}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

return self.titles[section].count
}




func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier(textCellIdenifier, forIndexPath: indexPath) as UITableViewCell

    let object = vaccineEntry[indexPath.section][indexPath.row]

    cell.textLabel?.text = object["name"]
    cell.detailTextLabel?.text = object["detail"]


    return cell
}
}

这一行因致命错误而崩溃：

let object = vaccineEntry[indexPath.section][indexPath.row]

或者我无法创建一个对象变量而只是去：

cell.textLabel?.text = vaccineEntry[indexPath.section][indexPath.row]["name"]
cell.textLabel?.text = vaccineEntry[indexPath.section][indexPath.row]["detail"]

但同样的交易，只是在[＆＃34; name＆＃34;]行崩溃了。我究竟做错了什么？非常感谢任何帮助！

Answer 1

对我来说非常好，没有任何错误或警告！ PFB代码：

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet weak var tableView: UITableView!

var vaccineEntry: Array<Array<Dictionary<String,String>>> = [[
    ["name" : "Rabies 1-yr", "detail": "None"],
    ["name" : "Rabies 3-yr", "detail": "None"],
    ["name" : "Distemper", "detail": "None"],
    ["name" : "Parvovirus", "detail": "None"],
    ["name" : "Adenovirus", "detail": "None"]],
    [
        ["name" : "Parainfluenza", "detail": "None"],
        ["name" : "Bordetella", "detail": "None"],
        ["name" : "Lyme Disease", "detail": "None"],
        ["name" : "Leptospirosis", "detail": "None"],
        ["name" : "Canine Influenza", "detail": "None"]
    ]]

var sections = ["Core Vaccines", "Non-Core Vaccines"]
var titles = [["Rabies 1-yr", "Rabies 3-yr", "Distemper", "Parvovirus", "Adenovirus"], ["Parainfluenza", "Bordetella", "Lyme Disease", "Leptospirosis", "Canine Influenza"]]


var textCellIdenifier = "vaccineCell"

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: self.textCellIdenifier)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return self.sections[section]
}

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return self.sections.count
}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return self.titles[section].count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier(textCellIdenifier, forIndexPath: indexPath) as UITableViewCell

    let object = vaccineEntry[indexPath.section][indexPath.row]

    cell.textLabel?.text = object["name"]
    cell.detailTextLabel?.text = object["detail"]

    return cell
}

}

模拟器上运行的代码：

Answer 2

这里的解决方法使代码更简单，效果更好！

var sections = ["Core Dog Vaccines", "Non-Core Dog Vaccines"]
var titles = [["Rabies 1-yr", "Rabies 3-yr", "Distemper", "Parvovirus", "Adenovirus"], ["Parainfluenza", "Bordetella", "Lyme Disease", "Leptospirosis", "Canine Influenza"]]
var details = [["No Dogument", "No Dogument", "No Dogument", "No Dogument", "No Dogument"], ["No Dogument", "No Dogument", "No Dogument", "No Dogument", "No Dogument"]]

var textCellIdenifier = "vaccineCell"


func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier(textCellIdenifier, forIndexPath: indexPath) as UITableViewCell


    cell.textLabel?.text = self.titles[indexPath.section][indexPath.row]
    cell.detailTextLabel?.text = self.details[indexPath.section][indexPath.row]


    return cell
}

而不是一个复杂的数组＆lt;阵列＆LT;字典＆LT;字符串，字符串＆GT;＆GT;＆GT;我只是为细节制作了一个单独的阵列。呃让它变得复杂，开始时很糟糕，但仍然每天都在学习！现在我可以从解析中加载数据，如下所示：

let rabies1Query = PFQuery(className: "Vaccine")
    rabies1Query.whereKey("userId", equalTo: (PFUser.currentUser()?.objectId)!)
    rabies1Query.whereKey("newID", equalTo: self.dogObject)
    rabies1Query.whereKey("vaccineType", equalTo: "Rabies 1-yr")
    rabies1Query.findObjectsInBackgroundWithBlock({ (object, error) -> Void in
        if error == nil {
            if let object = object {
                for object in object {

                    if object["expired"] as! Bool == true {
                        self.details[0][0] = self.expired
                        print("printing rabies 1-yr - EXPIRED")

                    } else if object["expired"] as! Bool == false {
                        self.details[0][0] = self.upToDate
                        print("printing rabies 1-yr - UP TO DATE")
                    }
                }
            }
        } else {
            print("printing rabies 1-yr - No Document")
        }
    })

等等，每个标题都会更改详细信息数组位置的位置。希望别人能看到并学到一些东西！

需要帮助设置数据模型才能显示tableView

2 个答案: