函数按delete键时不删除array项

Question

override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath:    NSIndexPath) {
if editingStyle == .Delete {
        allNotes.removeAtIndex(indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .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.
    }
}

//这是注释类

var allNotes:[Note] = []
var currentNoteIndex:Int = -1
var noteTable:UITableView?
let kAllNotes:String = "notes"
class Note:NSObject {
var date:String
var note:String

override init() {

    date = NSDate().description
    note = ""

}

func dictionary() -> NSDictionary {
    return ["note":note, "date": date]
}

class func savedNotes() {

    var aDictionary:[NSDictionary] = []
    for var i:Int = 0; i < allNotes.count; i++ {
        aDictionary.append(allNotes[i].dictionary())
    }

    NSUserDefaults.standardUserDefaults().setObject(aDictionary, forKey: kAllNotes)

}
class func loadNotes() {
    var defaults:NSUserDefaults = NSUserDefaults.standardUserDefaults()
    var savedData:[NSDictionary]? = defaults.objectForKey(kAllNotes) as? [NSDictionary]
    if let data:[NSDictionary] = savedData {
        for var i:Int = 0; i < data.count; i++ {
            var n:Note = Note()
            n.setValuesForKeysWithDictionary(data[i] as [NSObject : AnyObject])
            allNotes.append(n)
        }
    }

}
}

这是一个函数，但它不会永久地删除数组上的项，而是从表视图中临时删除。当重新启动模拟器时，仍然表视图显示已删除的项

 override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    if editingStyle == .Delete {
        allNotes.removeAtIndex(indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
        NSUserDefaults.standardUserDefaults().setObject(allNotes, forKey: kAllNotes)
    } 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.
    }
}

当我像这样更新任何尝试删除数组项时，显示一个线程错误

Answer 1

是的，它只会在运行时从您的allNotes数组中删除，因为您不会从内存中删除您的allNotes数组的获取值。

例如，如果你从内存中读取plist文件中的数组，那么你必须从plist文件中删除该项。

所以当你重新启动你的应用程序，你的allNotes数组将不会得到删除的项目从你的plist。