过滤字典与不区分大小写的search

这是一个关于如何过滤字典的后续问题，只需要filter是不区分大小写的

我有一个在Swift 3中填充Pickerview的字典。

var facilityDict: [Int: [String: String]] = [:] 

17：[“id”：“199”，“facilitycode”：“036”，“location_name”：“Centerpoint Medical Offices”]，
41：[“id”：“223”，“facilitycode”：“162”，“location_name”：“Dark Ridge Medical Center”]，
14：[“id”：“196”，“facilitycode”：“023”，“location_name”：“Spinnerpark”]，
20：[“id”：“202”，“facilitycode”：“048”，“location_name”：“教育剧院”]，
30：[“id”：“212”，“facilitycode”：“090”，“location_name”：“合作伙伴医疗机构”]，
49：[“id”：“231”，“facilitycode”：“223”，“location_name”：“GreenBay行政办公室”]

这本词典很长。 我有一个Textbox ，当数据改变时触发，我用它来创build一个searchvariables。 如果有人input“ar”，我想过滤字典中包含字符“ar”的所有东西，这样我就可以用原来的Big Dictionary列表中的一个小得多的部分来重置Picker列表。

filterlet filteredDictionaries = facilityDict.filter{$0.value.contains(where: {$0.value.contains("ar")})}.map{$0.value}好像过滤字典，但是我需要search不区分大小写。 有没有我可以设置更改filter显示不区分大小写的选项？

Answer 1

包含方法与range(of: "String") != nil相同range(of: "String") != nil没有任何选项。 所有你需要的是使用范围的string！=无caseInsensitive选项：

 extension String { func contains(_ string: String, options: CompareOptions) -> Bool { return range(of: string, options: options) != nil } } 

现在你可以做：

 "whatever".contains("ER", options: .caseInsensitive) 

如果您需要从字典数组中创build字典，则需要使用forEach遍历结果并从中重新生成字典：

---

 let facilityDict: [Int: [String: String]] = [ 17: ["id": "199", "facilitycode": "036", "location_name": "Centerpoint Medical Offices"], 41: ["id": "223", "facilitycode": "162", "location_name": "Dark Ridge Medical Center"], 14: ["id": "196", "facilitycode": "023", "location_name": "Spinnerpark"], 20: ["id": "202", "facilitycode": "048", "location_name": "Educational Theater"], 30: ["id": "212", "facilitycode": "090", "location_name": "Partner Medical Offices"], 49: ["id": "231", "facilitycode": "223", "location_name": "GreenBay Administrative Offices"]] var filtered: [Int: [String: String]] = [:] facilityDict.filter{$0.value.contains{$0.value.contains("AR", options: .caseInsensitive)}}.forEach{filtered[$0.key] = $0.value} print(filtered) // [30: ["id": "212", "facilitycode": "090", "location_name": "Partner Medical Offices"], 41: ["id": "223", "facilitycode": "162", "location_name": "Dark Ridge Medical Center"], 14: ["id": "196", "facilitycode": "023", "location_name": "Spinnerpark"]]