如何傳遞UIImage與核心數據？

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我有一個顯示用戶添加數據的主VC和一個用戶輸入數據的VC。如何傳遞UIImage與核心數據？

我想要做的是將圖像從添加VC傳遞到主VC。

目前，我得到了SIGABRT錯誤，當我按下保存，並出現以下錯誤信息：

2016年4月14日08：07：23.207在旅途[27697：2680635] - [On_The_Go。議程setImage：]：無法識別的選擇器發送到實例0x7faf03063900 2016-04-14 08：07：23.212轉到[27697：2680635] *終止應用程序由於未捕獲異常'NSInvalidArgumentException'，原因：' - [On_The_Go.Agenda setImage：]：無法識別的選擇器發送到實例0x7faf03063900' *第一次拋出調用堆棧：（ 0 CoreFoundation 0x000000010442bd85 exceptionPreprocess + 165 1 libobjc.A.dylib 0x0000000106897deb objc_exception_throw + 48 2的CoreFoundation 0x0000000104434d3d - [NSObject的（NSObject的）doesNotRecognizeSelector：] + 205 3的CoreFoundation 0x000000010437acfa ___forwarding_ + 970 4的CoreFoundation 0x000000010437a8a8 _CF_forwarding_prep_0 + 120 5上的圍棋0x0000000103e97e11 _TFC9On_The_Go22AddTableViewController4savefCSo15UIBarButtonItemT_ + 4897 6在旅途0x0000000103e9842a _TToFC9On_The_Go22AddTableViewController4savefCSo15UIBarButtonItemT_ + 58 7的UIKit 0x000000010531da8d - [UIApplication的sendAction：爲：從：forEvent：] + 92 8的UIKit 0x000000010572b067 - [的UIBarButtonItem （UIInternal）_sendAction：withEvent：] + 152 9 UIKit 0x0000000105491143 - [UIApplication sendAction：to：from：forEvent：] + 92 10 UIKit 0x0000000105490e67 - [UIControl sendAction：to：forEvent：] + 67 11 UIKit 0x0000000105491143 - UIControl _sendActionsForEvents：withEvent：方法] + 327 12的UIKit 0x00000001054912be - [UIControl _sendActionsForEvents：withEvent：方法] + 706 13的UIKit 0x0000000105490263 - [UIControl touchesEnded：withEvent：方法] + 601 14的UIKit 0x000000010539099f - [一個UIWindow _sendTouchesForEvent：] + 835 15 UIKit 0x00000001053916d4 - [UIWindow sendEvent：] + 865 16 UIKit 0x000000010533cdc6 - [UIApplication sendEvent：] + 263 17 UIKit 0x0000000105316553 _UI ApplicationHandleEventQueue + 6660 18的CoreFoundation 0x0000000104351301 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 19的CoreFoundation 0x000000010434722c __CFRunLoopDoSources0 + 556 20的CoreFoundation 0x00000001043466e3 __CFRunLoopRun + 867 21的CoreFoundation 0x00000001043460f8 CFRunLoopRunSpecific + 488個 22個GraphicsServices 0x0000000109efbad2 GSEventRunModal + 161 23的UIKit 0x000000010531bf09 UIApplicationMain + 171 24在Go 0x0000000103e9b672 main + 114 25 libdyld.dylib 0x000000010736492d start + 1 26 0x0000000000000001 0x0 + 1 ） libC++ abi。dylib：

主要VC：：

import UIKit 
import CoreData 

class MainTableViewController: UITableViewController, NSFetchedResultsControllerDelegate, UISearchResultsUpdating { 

var content:[Agenda] = [] 
var fetchResultController:NSFetchedResultsController! 
var searchController:UISearchController! 
var searchResults:[Agenda] = [] 

override func viewDidLoad() { 
    super.viewDidLoad() 

    let fetchRequest = NSFetchRequest(entityName: "Agenda") 
    let sortDescriptor = NSSortDescriptor(key: "subject", ascending: true) 
    fetchRequest.sortDescriptors = [sortDescriptor] 

    if let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)?.managedObjectContext { 

     fetchResultController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: managedObjectContext, sectionNameKeyPath: nil, cacheName: nil) 
     fetchResultController.delegate = self 

     do { 
      try fetchResultController.performFetch() 
      content = fetchResultController.fetchedObjects as! [Agenda] 
     } catch { 
      print(error) 
     } 
    } 

    tableView.estimatedRowHeight = 76.0 
    tableView.rowHeight = UITableViewAutomaticDimension 

    searchController = UISearchController(searchResultsController: nil) 
    tableView.tableHeaderView = searchController.searchBar 
    searchController.searchResultsUpdater = self 
    searchController.dimsBackgroundDuringPresentation = false 

    searchController.searchBar.placeholder = "Search items..." 
} 

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

// MARK: - Table view data source 

override func numberOfSectionsInTableView(tableView: UITableView) -> Int { 
    return 1 
} 

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    if searchController.active { 
     return searchResults.count 
    } else { 
     return content.count 
    } 
} 

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

    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! MainTableViewCell 

    // Configure the cell... 
    let agenda = (searchController.active) ? searchResults[indexPath.row] : content[indexPath.row] 

    cell.subjectLabel.text = agenda.subject 
    cell.deadlineLabel.text = agenda.deadline 
    cell.iconImageView.image = UIImage(data: agenda.image!) 

    if agenda.urgent == true { 
     cell.urgentImageView.image = UIImage(named: "urgent") 
     cell.urgentImageView.image = cell.urgentImageView.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate) 
     cell.urgentImageView.tintColor = UIColor(red: 212.0/255.0, green: 106.0/255.0, blue: 106.0/255.0, alpha: 1.0) 
    } else { 
     cell.urgentImageView.image = nil 
    } 

    cell.subjectLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping 
    cell.subjectLabel.numberOfLines = 999 
    cell.deadlineLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping 
    cell.deadlineLabel.numberOfLines = 999 

    cell.subjectLabel.sizeToFit() 
    cell.deadlineLabel.sizeToFit() 

    cell.subjectLabel.translatesAutoresizingMaskIntoConstraints = false 

    return cell 
} 

override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? { 

    let shareAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Share", handler: { (action, indexPath) -> Void in 

     let defaultText = "I've got to " + self.content[indexPath.row].subject 
     let activityController = UIActivityViewController(activityItems: [defaultText], applicationActivities: nil) 
     self.presentViewController(activityController, animated: true, completion: nil) 
    }) 

    let deleteAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete", handler: { (action, indexPath) -> Void in 

     if let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)?.managedObjectContext { 

      let itemToDelete = self.fetchResultController.objectAtIndexPath(indexPath) as! Agenda 
      managedObjectContext.deleteObject(itemToDelete) 

      do { 
       try managedObjectContext.save() 
      } catch { 
       print(error) 
      } 
     } 
    }) 

    shareAction.backgroundColor = UIColor(red: 28.0/255.0, green: 165.0/255.0, blue: 253.0/255.0, alpha: 1.0) 
    deleteAction.backgroundColor = UIColor(red: 202.0/255.0, green: 202.0/255.0, blue: 203.0/255.0, alpha: 1.0) 

    return [deleteAction, shareAction] 
} 

override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool { 
    if searchController.active { 
     return false 
    } else { 
     return true 
    } 
} 

func controllerWillChangeContent(controller: NSFetchedResultsController) { 
    tableView.beginUpdates() 
} 

func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) { 

    switch type { 
     case .Insert: 
      if let _newIndexPath = newIndexPath { 
       tableView.insertRowsAtIndexPaths([_newIndexPath], withRowAnimation: .Fade) 
      } 

     case .Delete: 
      if let _indexPath = indexPath { 
       tableView.deleteRowsAtIndexPaths([_indexPath], withRowAnimation: .Fade) 
      } 

     case .Update: 
      if let _indexPath = indexPath { 
       tableView.reloadRowsAtIndexPaths([_indexPath], withRowAnimation: .Fade) 
      } 

     default: 
      tableView.reloadData() 
    } 

    content = controller.fetchedObjects as! [Agenda] 
} 

func controllerDidChangeContent(controller: NSFetchedResultsController) { 
    tableView.endUpdates() 
} 

func filterContentForSearchText(searchText: String) { 
    searchResults = content.filter({ (content:Agenda) -> Bool in 
    let nameMatch = content.subject.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch) 
    let deadlineMatch = content.deadline.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch) 
    return nameMatch != nil || deadlineMatch != nil 
    }) 
} 

func updateSearchResultsForSearchController(searchController: UISearchController) { 
    if let searchText = searchController.searchBar.text { 
     filterContentForSearchText(searchText) 
     tableView.reloadData() 
    } 
} 

@IBAction func unwindToHomeScreen(segue: UIStoryboardSegue) { 
} 
}

添加VC：

import UIKit 
import CoreData 

class AddTableViewController: UITableViewController { 

// MARK: - Table view data source 

@IBOutlet var photoImageView:UIImageView! 
@IBOutlet var subjectTextField:UITextField! 
@IBOutlet var deadlineTextField:UITextField! 
@IBOutlet var yesButton:UIButton! 
@IBOutlet var noButton:UIButton! 

var urgent = true 
var content:Agenda! 
var imageName:String = "" 

override func viewDidLoad() { 
    super.viewDidLoad() 

    tableView.tableFooterView = UIView(frame: CGRectZero) 
    title = "Add an item" 

    photoImageView.image = UIImage(named: imageName) 
    photoImageView.image = photoImageView.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate) 
    photoImageView.tintColor = UIColor.whiteColor() 

    if imageName == "cup" { 
     photoImageView.backgroundColor = UIColor(red: 137.0/255.0, green: 72.0/255.0, blue: 0.0/255.0, alpha: 1.0) 
    } else if imageName == "transport" { 
     photoImageView.backgroundColor = UIColor.blueColor() 
    } else if imageName == "beach" { 
     photoImageView.backgroundColor = UIColor.yellowColor() 
    } else if imageName == "weather" { 
     photoImageView.backgroundColor = UIColor(red: 255.0/255.0, green: 122.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
    } else if imageName == "gear" { 
     photoImageView.backgroundColor = UIColor(red: 106.0/255.0, green: 207.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
    } else if imageName == "money" { 
     photoImageView.backgroundColor = UIColor(red: 110.0/255.0, green: 110.0/255.0, blue: 110.0/255.0, alpha: 1.0) 
    } else if imageName == "technology-1" { 
     photoImageView.backgroundColor = UIColor.orangeColor() 
    } else if imageName == "web" { 
     photoImageView.backgroundColor = UIColor(red: 255.0/255.0, green: 114.0/255.0, blue: 110.0/255.0, alpha: 1.0) 
    } else if imageName == "people" { 
     photoImageView.backgroundColor = UIColor(red: 104.0/255.0, green: 251.0/255.0, blue: 208.0/255.0, alpha: 1.0) 
    } else if imageName == "nature" { 
     photoImageView.backgroundColor = UIColor(red: 110.0/255.0, green: 118.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
    } else if imageName == "draw" { 
     photoImageView.backgroundColor = UIColor.purpleColor() 
    } else if imageName == "technology" { 
     photoImageView.backgroundColor = UIColor(red: 131.0/255.0, green: 249.0/255.0, blue: 2.0/255.0, alpha: 1.0) 
    } else if imageName == "screen" { 
     photoImageView.backgroundColor = UIColor(red: 135.0/255.0, green: 134.0/255.0, blue: 135.0/255.0, alpha: 1.0) 
    } else if imageName == "shop" { 
     photoImageView.backgroundColor = UIColor(red: 210.0/255.0, green: 120.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
    } else if imageName == "arrow" { 
     photoImageView.backgroundColor = UIColor.blackColor() 
    } 

    navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil) 
} 

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

@IBAction func save(sender:UIBarButtonItem) { 

    let subject = subjectTextField.text 
    let deadline = deadlineTextField.text 
    let icon = UIImage(named: imageName) 

    if subject == "" || deadline == "" || icon == "" { 
     let alertController = UIAlertController(title: "Oops!", message: "Not all of the fields have been filled in. Please fill them in before proceeding.", preferredStyle: UIAlertControllerStyle.Alert) 
     alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)) 
     self.presentViewController(alertController, animated: true, completion: nil) 

     return 
    } 

    if let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)?.managedObjectContext { 

     content = NSEntityDescription.insertNewObjectForEntityForName("Agenda", inManagedObjectContext: managedObjectContext) as! Agenda 
     content.subject = subject! 
     content.deadline = deadline! 
     content.urgent = urgent 

     if let iconImage = photoImageView.image { 
      content.image = UIImagePNGRepresentation(iconImage) 
     } 

     do { 
      try managedObjectContext.save() 
     } catch { 
      print(error) 
      return 
     } 
    } 

    dismissViewControllerAnimated(true, completion: nil) 
} 

@IBAction func toggleUrgentButton(sender: UIButton) { 

    if sender == yesButton { 
     urgent = true 
     yesButton.backgroundColor = UIColor(red: 170.0/255.0, green: 240.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
     noButton.backgroundColor = UIColor.lightGrayColor() 
    } else if sender == noButton { 
     urgent = false 
     yesButton.backgroundColor = UIColor.lightGrayColor() 
     noButton.backgroundColor = UIColor(red: 170.0/255.0, green: 240.0/255.0, blue: 255.0/255.0, alpha: 1.0) 
    } 
} 

@IBAction func unwindToIcon(segue: UIStoryboardSegue) { 
} 
}

我的類（類型NSException的未捕獲的異常（LLDB）

我的代碼是終止議程）：

import Foundation 
import CoreData 

class Agenda:NSManagedObject { 

@NSManaged var subject:String 
@NSManaged var deadline:String 
@NSManaged var urgent:NSNumber? 
@NSManaged var image:NSData? 
}

圖像從另一個VC中選擇，但如果您需要該代碼，請隨時詢問。

我想讓圖像進入主VC的iconImageView。

來源

2016-04-14 Annabelle Sykes

這是一個衆所周知的問題。很難確切地說出你的問題在哪裏，因爲有很多關於「議程」或「圖像」的提及，你在'Agenda'對象上調用'setImage：'（可能是'agendaObject.image = '。哪一行確切導致崩潰？你可以通過放置斷點找到它... – Larme

議程沒有財產.image的外觀... – Magoo

@Magoo議程是一個類，我將添加代碼的問題 –

行，所以只是爲了檢查。您正在覈心數據模型中使用image的Binary Data選項嗎？

如果這樣你就可以存儲圖像，如果您還單擊允許外部存儲和使用agenda.image = UIImagePNGRepresentation(image)或JPG，PNG，而不是爲JPEG文件

How to store an image in core data

來源

2016-04-14 12:45:19 Magoo

我正在這樣做。 –

如何傳遞UIImage與核心數據？

回答

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