在类型中找不到枚举大小写开关 [英] Enum case switch not found in type

问题描述

有人可以帮我这个。

我有以下 public enum

  public enum OfferViewRow {
 case Candidates 
 case Expiration 
 case description 
 case Timing 
 case Money 
 case付款
 
} 
  

以下mutableProperty：

  private let rows = MutableProperty< [OfferViewRow]>（[OfferViewRow]（））
  

在我的init文件中，我使用一些reactiveCocoa设置我的MutableProperty：

  rows <〜application.producer 
 .map {response in 
 if response？.application.status == .Applied {
 return [.Candidates，.Description，.Timing，.Money，。付款] 
} else {
 return [.Candidates，.Expiration，.Description，.Timing，.Money，.Payment] 
} 
} 
  

但现在的问题，当我尝试获得我的枚举的价值在我的行内，它会抛出错误。请看下面的代码。

  func cellViewModelForRowAtIndexPath（indexPath：NSIndexPath） - > ViewModel {
 guard 
 let row = rows.value [indexPath.row]，
 let response = self.application.value 
 else {
 fatalError（） 
} 
 
切换行{
 case .Candidates：
 //做某事
 case .Expiration：
 //做某事
 case。描述：
 //做某事
 case .Timing：
 //做某事
 case .Money：
 //做某事
案例：付款：
 //做某事
} 
} 
  

它抛出一个错误：枚举案例'some'没有找到类型'OfferViewRow 在行 let row = rows.value [indexPath.row]

每个交换机语句都会抛出：枚举情况'候选人'未在类型'<<错误类型>>

可以meone帮我这个吗

解决方案

保护声明需要一个可选项，如错误消息中的Enum case某些所示。 >

但 rows.value [indexPath.row] 不是可选< OfferViewRow> ，它是一个原始的 OfferViewRow 。所以它不会输入保密声明。

移动 let row = rows.value [indexPath.row] 一行：Swift处理边界检查，如果indexPath.row超出范围，将会崩溃。

Can someone please help me with this.

I have the following public enum

public enum OfferViewRow {
    case Candidates
    case Expiration
    case Description
    case Timing
    case Money
    case Payment

}

And the following mutableProperty:

private let rows = MutableProperty<[OfferViewRow]>([OfferViewRow]())

In my init file I use some reactiveCocoa to set my MutableProperty:

rows <~ application.producer
    .map { response in
        if response?.application.status == .Applied {
            return [.Candidates, .Description, .Timing, .Money, .Payment]
        } else {
            return [.Candidates, .Expiration, .Description, .Timing, .Money, .Payment]
        }
}

But now the problem, when I try to get the value of my enum inside my rows it throws errors. Please look at the code below.

 func cellViewModelForRowAtIndexPath(indexPath: NSIndexPath) -> ViewModel {
        guard
            let row = rows.value[indexPath.row],
            let response = self.application.value
            else {
                fatalError("")
        }

        switch row {
        case .Candidates:
             // Do something
        case .Expiration:
            // Do something
        case .Description:
           // Do something
        case .Timing:
           // Do something
        case .Money:
           // Do something
        case .Payment:
           // Do something
        }
    }

It throws an error: Enum case 'some' not found in type 'OfferViewRow on the line let row = rows.value[indexPath.row]

And on every switch statements it throws: Enum case 'Candidates' not found in type '<<Error type>>

Can someone help me with this?

解决方案

The guard statement wants an optional, as hinted by "Enum case 'some'" in the error message.

But rows.value[indexPath.row] is not Optional<OfferViewRow>, it is a raw OfferViewRow. So it won't enter a guard statement.

Move let row = rows.value[indexPath.row] one line up: Swift takes care of bounds checking, and will crash if indexPath.row is out of bounds.

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