Swift 按日期对自定义词典排序
这是我在Firestore中的数据: 我的评论模式:Swift 按日期对自定义词典排序,swift,sorting,dictionary,Swift,Sorting,Dictionary,这是我在Firestore中的数据: 我的评论模式: class CommentModel { var commentText: String? var commentDate: NSObject? var uid: String? var username : String? var profileImageUrl: String? init(dictionary: [String: Any]) { commentText = dictionary["commentText"]
class CommentModel {
var commentText: String?
var commentDate: NSObject?
var uid: String?
var username : String?
var profileImageUrl: String?
init(dictionary: [String: Any]) {
commentText = dictionary["commentText"] as? String
commentDate = dictionary["commentDate"] as? NSObject
uid = dictionary["uid"] as? String
username = dictionary["username"] as? String
profileImageUrl = dictionary["profileImageUrl"] as? String
}
}
我的评论词典包含所有“评论”文档
XCode给了我以下建议,但我不确定如何使用它
self.comments.sorted { (CommentModel, CommentModel) -> Bool in
}
如何按注释日期对词典进行排序?您需要
self.comments.sort { $0.commentDate < $1.commentDate }
或
将日期存储为
日期
。不是作为一个NSObject?
NSObject
是一个非常通用的类型。具体到类型Shi Sh_Khan,我已经尝试过了,并且得到了这个结果-无法将类型“()”的值赋给类型“[CommentModel]”排序没有返回它的变化
commentDate = dictionary["commentDate"] as? Date
commentDate = dictionary["commentDate"] as? String