Ios 从核心数据实体获取NSSet

我有一个NSManagedObject类（SearchHistory.swift），它与（Hospital.swift）类有关系

我试图获取NSSet，但它给了我编译错误：使用了未声明的类型“SearchHistory”，尽管我以相同的方式获取其他实体，并且没有任何错误

let AppDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
            let Context: NSManagedObjectContext = AppDel.managedObjectContext!
            let request = NSFetchRequest(entityName: "SearchHistory")
            var search = Context.executeFetchRequest(request, error: nil) as! [SearchHistory] // ERROR HERE :(
            for (var x=0; x<search.count; x++) {
                let hospitalsArray: NSArray = search[x].hospitals.allObjects

                for hospital in hospitalsArray {
                    println(hospital.hospital_name)
                }
            }

让AppDel:AppDelegate=UIApplication.sharedApplication（）.delegate为！AppDelegate
让上下文：NSManagedObjectContext=AppDel.managedObjectContext！
let request=NSFetchRequest（entityName:“SearchHistory”）
var search=Context.executeFetchRequest（请求，错误：nil）为！[SearchHistory]//此处出错：(
对于（var x=0；xIf），如果这是真正的错误消息，您在“SearchHistroty”上的某个地方有一个拼写错误。@PhillipMills这是一个拼写错误
let AppDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
            let Context: NSManagedObjectContext = AppDel.managedObjectContext!
            let request = NSFetchRequest(entityName: "SearchHistory")
            var search = Context.executeFetchRequest(request, error: nil) as! [SearchHistory] // ERROR HERE :(
            for (var x=0; x<search.count; x++) {
                let hospitalsArray: NSArray = search[x].hospitals.allObjects

                for hospital in hospitalsArray {
                    println(hospital.hospital_name)
                }
            }