分段错误：11 - Xcode 10

Posted 2023-03-13

【中文标题】分段错误：11 - Xcode 10

【英文标题】：Segmentation fault: 11 - Xcode 10

【发布时间】：2018-09-17 23:43:28

【问题描述】：

在 RangeText=" 的类型检查语句中 播放列表名称 = [] 让 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]
    

"

在 RangeText="playlists = try?context.fetch(request) as NSArray!" 的类型检查表达式时错误：分段错误：11

代码如下：

 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。有什么想法吗？

【问题讨论】：

我不清楚到底什么是段错误 - 这不是你的应用程序在运行时？是 XCode 还是 Swift 编译器？

@Rup 我尝试编译并运行，但它显示了这个错误。

【参考方案1】：

没有像NSArray! 这样的类型，在任何情况下，你都没有任何理由去转换它。彻底删除as NSArray!。使用 Swift 类型。