根據選擇顯示正確的文字顏色？

Question

我喜歡將文字顏色更改爲​​作爲事件，如果eventStatus = 1和red如果eventStatus = 2。我嘗試了以下方法，它將every event更改爲​​如果last selectedeventStatus = 1和every event到red如果last selectedeventStatus = 2。如何根據每個單獨事件的eventStatus顯示正確的顏色？通過cellForRowAt的fetchRequest所以eventLabel的顏色會根據最後result的eventStatus設置

override func viewDidLoad() { 
     super.viewDidLoad() 
     eventData() 
     for i in stride(from: 0, to: eventTitleOnc.count, by: 1){ 
       oncEvents.append(eventTitleOnc[i])} 

    for i in stride(from: 0, to: eventTitleOfc.count, by: 1){ 
     ofcEvents.append(eventTitleOfc[i]) 
    myEventTableView.reloadData() 
} 


public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ 
let myEventCell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath) as! EventTableViewCell 

    switch (eventSegCtrl.selectedSegmentIndex) 
    { 
    case 0: 
     myEventCell.eventLabel.text = oncEvents[indexPath.row] 
     break 
    case 1: 
     myEventCell.eventLabel.text = ofcEvents[indexPath.row] 
     break 
default:break 
    } 
    let fetchRequest: NSFetchRequest<EventDec> = EventDec.fetchRequest() 
    if let results = try? context.fetch(fetchRequest) { 
     results.forEach { (result) in 
      if (result.eventStatus == 1) 
      { 
       myEventCell.eventLabel?.textColor = UIColor.green 
      } 
      else 
      { 
       myEventCell.eventLabel?.textColor = UIColor.red 
      } 
     } 
    } 
    return myEventCell 
} 

private func eventData(){ 
     let appDelegate = UIApplication.shared.delegate as! AppDelegate 
     let context = appDelegate.persistentContainer.viewContext 
     let request = NSFetchRequest<NSFetchRequestResult>(entityName: "EventSchedule") 
     request.returnsObjectsAsFaults = false 
     do 
     { 
      let results = try context.fetch(request) 
      if results.count > 0 
      { 
       for result in results as! [NSManagedObject] 
       { 
        if let eventDisTextOnc = result.value(forKey: "eventNameOnc") as? String 
        { 
         eventTitleOnc.append(eventDisTextOnc) 
        } 
        if let eventDisTextOfc = result.value(forKey: "eventNameOfc") as? String 
        { 
         eventTitleOfc.append(eventDisTextOfc) 
        } 
       } 
      } 
     } 
     catch{} 
    } 

Answer 1

您需要創建EventSchedule的數組，而不是創建兩個數組，並將該數組與您的cellForRowAt方法一起使用。

var eventSchedule = [EventSchedule]() 

現在在你的eventData方法中初始化這個數組。

private func eventData(){ 
    let appDelegate = UIApplication.shared.delegate as! AppDelegate 
    let context = appDelegate.persistentContainer.viewContext 
    let request = NSFetchRequest<NSFetchRequestResult>(entityName: "EventSchedule") 
    request.returnsObjectsAsFaults = false 
    do 
    { 
     self.eventSchedule = try context.fetch(request) as! [EventSchedule] 

    } 
    catch{} 
} 

現在使用這個單一的陣列與您的cellForRowAt方法。

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ 
    let myEventCell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath) as! EventTableViewCell 

    if eventSegCtrl.selectedSegmentIndex == 0 { 
     myEventCell.eventLabel.text = self.eventSchedule[indexPath.row]. eventNameOnc 
    } 
    else { 
     myEventCell.eventLabel.text = self.eventSchedule[indexPath.row]. eventNameOfc 
    } 
    if let eventDesc = self.eventSchedule[indexPath.row].eventDec,   
     let event = eventDesc allObjects.last as? EventDec, event.eventStatus == 1 { 
     myEventCell.eventLabel.textColor = UIColor.green 
    } 
    else { 
     myEventCell.eventLabel.textColor = UIColor.red 
    } 
} 

Answer 2

你循環。您應該將fetchRequest作爲全局變量存儲。

解：

聲明全局陣列，用於存儲EventDec對象：

var events: [EventDec] = [] 

然後，在eventData()，將數據插入到所述陣列：

for result in results as! [NSManagedObject] 
{ 
    if let eventDisTextOnc = result.value(forKey: "eventNameOnc") as? String 
    { 
     eventTitleOnc.append(eventDisTextOnc) 
    } 
    if let eventDisTextOfc = result.value(forKey: "eventNameOfc") as? String 
    { 
     eventTitleOfc.append(eventDisTextOfc) 
    } 

    events.append(result as! EventDec) 
} 

最後，在cellForRowAtIndexPath，設置textColor對應eventStatus：

if (events[indexPath.row].eventStatus == 1) 
{ 
    myEventCell.eventLabel?.textColor = UIColor.green 
} 
else 
{ 
    myEventCell.eventLabel?.textColor = UIColor.red 
} 

Answer 3

沒錯。 indexPath.row與您的讀取結果不匹配，因爲您的forEach函數有效地在循環內部形成循環。 forEach循環的最後結果將是所有單元格的結果。解決方案可以根據您的eventStatus爲所有單元製作cell.tag，並應用cell.tag值中的顏色。