LazyFilterBidirectionalCollection< Results< datatype>>'到预期的参数类型"[数据类型]" [英] LazyFilterBidirectionalCollection<Results<datatype>>' to expected argument type '[datatype]'

问题描述

将项目从swift 2.3转换为swift 3之后，我在Realm Filter中遇到此错误，但无法在array中获得过滤结果:

After I convert my project from swift 2.3 to swift 3 , I got this error in Realm Filter I can't get filter result in array :

func filterUsers(_ searchText: String, completion: (([Lawyer]) -> Void)) {

        let bgRealm = try! Realm()            // Filter the whole list of users



let results = bgRealm.objects(Lawyer.self).filter { (cc) -> Bool in
    cc.name.contains2(searchText) ||
        cc.name.contains2(searchText) ||
        cc.phoneNumber2.contains2(searchText)

}
    print(results)


    completion(results)

}

推荐答案

filter，map等是对objects返回的Results的惰性操作.这以诸如LazyFilterBidirectionalCollection<T>的类型实现.要实际执行过滤并获取结果数组，您需要通过包装Array初始化器(例如Array(bgRealm.objects...))

filter, map, etc. are lazy operations on the Results returned by objects. This is implemented in types such as LazyFilterBidirectionalCollection<T>. To actually perform the filtering and get an array of results, you need to promote this collection to an array by wrapping in an Array initializer (e.g. Array(bgRealm.objects...))

从文档中获取:

查询返回一个Results实例，其中包含以下内容的集合 对象.结果具有与Array和对象非常相似的接口 可以使用索引下标访问结果中包含的内容. 与数组不同，结果仅包含单个子类类型的对象. 所有查询(包括查询和属性访问)在Realm中都是惰性的. 仅在访问属性时才读取数据.

Queries return a Results instance, which contains a collection of Objects. Results have an interface very similar to Array and objects contained in a Results can be accessed using indexed subscripting. Unlike Arrays, Results only hold Objects of a single subclass type. All queries (including queries and property access) are lazy in Realm. Data is only read when the properties are accessed.

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