我读了很多关于SO的文章,我仍然难过! 我有一系列字典,见下文:
var myArray = [[String:AnyObject]]() myArray.append([ "caseNumber" : "12349", "formType" : "Advanced", "caseStatus" : "Approved", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name1" ]) myArray.append([ "caseNumber" : "12345", "formType" : "Standard", "caseStatus" : "On-Hold", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name2" ]) myArray.append([ "caseNumber" : "12342", "formType" : "Normal", "caseStatus" : "Rejected", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name3" ])这些数据将进入tableView,我希望用户能够通过caseNumber或我的caseLUD (日期)来决定排序顺序。 但我无法弄清楚如何按值重新排序数组。 请问有什么想法吗? 所有帮助赞赏。
I've read many articles on SO and I'm still stumped! I have an array of dictionaries, see below:
var myArray = [[String:AnyObject]]() myArray.append([ "caseNumber" : "12349", "formType" : "Advanced", "caseStatus" : "Approved", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name1" ]) myArray.append([ "caseNumber" : "12345", "formType" : "Standard", "caseStatus" : "On-Hold", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name2" ]) myArray.append([ "caseNumber" : "12342", "formType" : "Normal", "caseStatus" : "Rejected", "caseDetails" : "blah blah", "caseLUD" : NSDate(), "friendlyName" : "name3" ])This data will go into a tableView and I want the user to be able to decide the sort order, either by caseNumber or my caseLUD (date). But I can't figure out how to re-order the array by values. Any ideas, please? All help appreciated.
最满意答案
按caseNumber排序:
myArray.sortInPlace { ($0["caseNumber"] as! String) < ($1["caseNumber"] as! String) }注意,这使用caseNumber作为String ,这可能导致令人惊讶的结果(例如"12345" < "2" )。 您可能要么将caseNumber存储为Int ,要么在排序时将其转换为Int :
myArray.sortInPlace { Int($0["caseNumber"] as! String) < Int($1["caseNumber"] as! String) }按caseLUD排序:
myArray.sortInPlace { ($0["caseLUD"] as! NSDate).compare($1["caseLUD"] as! NSDate) == .OrderedAscending}.OrderedAscending会先给你最早的日期,而.OrderedDescending会先给你最新的日期。
如果您将数据存储在Struct而不是Dictionary ,则可以避免混乱的类型转换。
struct CaseRecord { var caseNumber: Int var formType: String var caseStatus: String var caseDetails: String var caseLUD: NSDate var friendlyName: String } var myArray = [CaseRecord]() myArray.append(CaseRecord( caseNumber : 12345, formType : "Advanced", caseStatus : "Approved", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name1" ) ) myArray.append(CaseRecord( caseNumber : 124, formType : "Standard", caseStatus : "On-Hold", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name2" ) ) myArray.append(CaseRecord( caseNumber : 13, formType : "Normal", caseStatus : "Rejected", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name3" ) ) myArray.sortInPlace { $0.caseNumber < $1.caseNumber } myArray.sortInPlace { $0.caseLUD.compare($1.caseLUD) == .OrderedDescending }To sort by caseNumber:
myArray.sortInPlace { ($0["caseNumber"] as! String) < ($1["caseNumber"] as! String) }Note, this uses caseNumber as a String which could lead to surprising results (for example "12345" < "2"). You might either want to store caseNumber as an Int, or convert it to an Int when sorting:
myArray.sortInPlace { Int($0["caseNumber"] as! String) < Int($1["caseNumber"] as! String) }To sort by caseLUD:
myArray.sortInPlace { ($0["caseLUD"] as! NSDate).compare($1["caseLUD"] as! NSDate) == .OrderedAscending}.OrderedAscending will give you earliest date first, and .OrderedDescending will give you latest date first.
If you stored your data in a Struct instead of a Dictionary, you could avoid the messy typecasting.
struct CaseRecord { var caseNumber: Int var formType: String var caseStatus: String var caseDetails: String var caseLUD: NSDate var friendlyName: String } var myArray = [CaseRecord]() myArray.append(CaseRecord( caseNumber : 12345, formType : "Advanced", caseStatus : "Approved", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name1" ) ) myArray.append(CaseRecord( caseNumber : 124, formType : "Standard", caseStatus : "On-Hold", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name2" ) ) myArray.append(CaseRecord( caseNumber : 13, formType : "Normal", caseStatus : "Rejected", caseDetails : "blah blah", caseLUD : NSDate(), friendlyName : "name3" ) ) myArray.sortInPlace { $0.caseNumber < $1.caseNumber } myArray.sortInPlace { $0.caseLUD.compare($1.caseLUD) == .OrderedDescending }更多推荐
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