ios - swift : TableView

Question

我定义了以下 tableView:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("ProductCell", forIndexPath:indexPath)
    print("Pass it to tableview \(courseName2) ")
     print("Pass it to tableview \(codeName2) ")
    var count = 0


    getTime( (self.courseName2!), courseCode: (self.codeName2!), completion:{(success:[ClassSchedule]) -> Void in
            count = classes[0].total!
            print("TOTAL CKASSESSSs \(count) ")
            dispatch_async(dispatch_get_main_queue(),{
                self.tableView.reloadData()
                for var i = 0; i < count; ++i
                {
                    //print("FOR LOOP COUNT: \(i)")
                    cell.textLabel?.text = "\(classes[i].section!)"
                    // Start Time: \(classes[i].start!)End Time: \(classes[i].end!)
                    print("FOR LOOP COUNT: \(i) Section\(classes[i].section!)")
                }

            });

    })
    return cell
}

for 循环函数中的 print 语句提供了来自“classes”数组的正确信息，但是当我模拟代码时，只有最后一个元素填满每一行。

我希望它按顺序显示“LEC 001”、“LEC 002”、“LEC 003”、“LEC 004”、“TST 101”，而不是“TST 101”，它们包含在“classes”数组中.

getTime函数，通过JSON调用获取数据:

 // Read the JSON
    do {
        let data: NSData? = NSData(contentsOfURL: url)
        if let jsonResult: NSDictionary = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as? NSDictionary
        {
            //////ARRAY///////
            let dataArray = jsonResult["data"] as! NSArray
            //////
            let arrayLength = dataArray.count
            var count = 0
            //classes.append(ClassSchedule(course: item["subject"] as! String, code: item["catalog_number"] as! String, section: item["section"] as! String) )

            print("TOTAL OF CLASSES: \(arrayLength)");

            for item in dataArray
            {

                classes.append(ClassSchedule(course: "TEMP", code: "TEMP", section: "TEMP", days:"TEMP", start:"TEMP", end:"TEMP", building:"TEMP", room:"TEMP", total: arrayLength) )

                classes[count].course = (item["subject"] as! String)
                classes[count].code = (item["catalog_number"] as! String)
                classes[count].section = (item["section"] as! String)
                print("Subject: \(classes[count].course!) \(classes[count].code!)");
                print("Section: \(classes[count].section!)");
              // print("Section: \(section_numb)");

                let subjectArray = item["classes"] as! NSArray

                for item2 in subjectArray{

                    let dateDictionary = item2["date"] as! NSDictionary
                    //let startTime = dateDictionary["start_time"]!
                    //self.performSelectorOnMainThread("updateIPLabel:", withObject: startTime, waitUntilDone: false)
                    //let endTime = dateDictionary["end_time"]!
                    classes[count].days = (dateDictionary["weekdays"] as! String)
                    classes[count].start = (dateDictionary["start_time"] as! String)
                    classes[count].end = (dateDictionary["end_time"] as! String)
                    string1 = classes[count].start!
                    print("Weekdays: \(classes[count].days!)");
                    print("START TIME: \(classes[count].start!)");
                    print("End Time: \( classes[count].end!)");


                    let locationDictionary = item2["location"] as! NSDictionary
                    classes[count].building = (locationDictionary["building"] as? String)
                    classes[count].room = (locationDictionary["room"] as? String)
                    print("Building: \(classes[count].building) \(classes[count].room)");


                    count += 1
                    print(count)
                    print("")

                }

            }
            //let subject = dataArray["subject"]
        }

    } catch {
        print("bad things happened")
    }

    //print("ASDIAWDWD: \(classes[0].section)")
   // print("ASDIAWDWASDASDD: \(classes[1].section)")
    completion(classes: classes)
    }).resume()

Answer 1

很难准确地说出您要做什么，但您不应该在 TableView 数据源方法中使用任何异步方法。这些方法应该只代表您已有的数据。好像你可以替换整个 getTime只用 cell.textLabel?.text = "\(classes[indexPath.row].section!)" block .