細分錯誤：11-Xcode 10

Question

2. 在RangeText =“ {playlistNames = []處進行類型檢查語句時，讓requestLibrary = NSFetchRequest（entityName：” Library“）

    let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Playlist") request.sortDescriptors = [playlistSortDescriptor] playlists = try? context.fetch(request) as NSArray! print("Playlist Count - ",playlists.count) let librarys:NSArray! = try? context.fetch(requestLibrary) as NSArray! for library in librarys{ let libraryName = (library as AnyObject).value(forKey: "library") as! String playlistNames += [libraryName] } for playlist in playlists{ let playlistName = (playlist as AnyObject).value(forKey: "playlistName") as! String if playlistName == "Library" { playlistNames.insert(playlistName, at: 0) }else { playlistNames += [playlistName] } } 

   }”

3. 在RangeText =“ playlists = try？context.fetch（request）as NSArray處進行類型檢查表達式時！” 錯誤：細分錯誤：11

這是代碼：

 func refreshPlaylists(){
    playlistNames = []
    let requestLibrary = NSFetchRequest<NSFetchRequestResult>(entityName: "Library")

    let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Playlist")
    request.sortDescriptors = [playlistSortDescriptor]

    playlists = try? context.fetch(request) as NSArray!
    print("Playlist Count - ",playlists.count)


    let librarys:NSArray! = try? context.fetch(requestLibrary) as NSArray!
    for library in librarys{
        let libraryName = (library as AnyObject).value(forKey: "library") as! String
        playlistNames += [libraryName]
    }

    for playlist in playlists{
        let playlistName = (playlist as AnyObject).value(forKey: "playlistName") as! String
        if playlistName == "Library" {
            playlistNames.insert(playlistName, at: 0)
        }else {
            playlistNames += [playlistName]
        }
    }
}

在我更新到Xcode 10之前它可以工作。

Answer 1

沒有像NSArray!這樣的類型NSArray! 在任何情況下，您從沒有任何理由投身其中。 刪除as NSArray! 始終。 使用Swift類型。