[valueForUndefinedKey:]:此类与键约会日期的键值编码不兼容. -迅速 [英] [ valueForUndefinedKey:]: this class is not key value coding-compliant for the key appointmentDate.' - swift

问题描述

我想对对象数组进行排序是我对对象数组进行排序的功能

i want to sort an array of object below is my function to sort the array of object

    class func Fn_SortByParameter(arrayToSort:NSMutableArray,paramName:NSString!, isAscending:Bool!){
    var sortDescriptor:NSSortDescriptor = NSSortDescriptor(key: paramName, ascending: isAscending, selector: Selector("localizedCompare:"))
    var sortDescriptors:NSArray = NSArray(object: sortDescriptor)
    var sortedArray:NSArray = arrayToSort.sortedArrayUsingDescriptors(sortDescriptors)
    arrayToSort.removeAllObjects()
    arrayToSort.addObjectsFromArray(sortedArray)
}

AND

class func Fn_SortByParameter(arrayToSort:NSMutableArray,paramName:NSString!, isAscending:Bool!){
    var sortDescriptor:NSSortDescriptor = NSSortDescriptor(key: paramName, ascending: isAscending)
    var sortDescriptors:NSArray = NSArray(object: sortDescriptor)
    var sortedArray:NSArray = arrayToSort.sortedArrayUsingDescriptors(sortDescriptors)
    arrayToSort.removeAllObjects()
    arrayToSort.addObjectsFromArray(sortedArray)
}

数组包含以下类的对象

class Appointment: NSObject {

     var id:Double!
      var status:NSString!
      var clinic:Clinic!
      var medicalCase:MedicalCase!
      var patient:Patient!
      var appointmentDate:Double! // Unix timestamp
      var reasonForVisit:NSString!
      var cancellationReason:NSString!
      var visit:Visit!
    }

当我尝试排序时，它崩溃并显示以下错误

When i am trying to sort it is crashing with below error

[valueForUndefinedKey:]:此类与键约会日期的键值编码不兼容.'

[ valueForUndefinedKey:]: this class is not key value coding-compliant for the key appointmentDate.'

函数调用进行排序

Fn_SortByParameter(allAppointments.aaData, paramName: "appointmentDate", isAscending: true)

推荐答案

您遇到的问题是，像Double!这样的可选值类型没有暴露给Objective-C运行时，也不可用于键值编码

The problem you're running into is that optional value types like Double! are not exposed to the objective-c runtime and not available for key-value coding.

您可以将其设置为非可选:var appointmentDate:Double，使用NSNumber对象:var appointmentDate:NSNumber!，或使用Swift数组和内置的sorted函数.

You can make it non-optional: var appointmentDate:Double, use an NSNumber object: var appointmentDate:NSNumber!, or use a Swift array and the built-in sorted function.

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