How to check NSDate yyyy/mm/dd in NSArray and compare it? - ios

Question

I have an NSArray, inside I have a var of kind NSDate
which give this format "timeStamp = "2015-08-18 16:58:31"
I want to compare in all the array the date only 2015-08-18
compare it and if same date only the first one show full NSDate
and the rest with same date show only the time on UI
This is what I did so far:
func getAllMessages() -> NSArray{
var allMessages = self.mutableSetValueForKey("messages").allObjects as NSArray
let timeStampSortDescriptor = NSSortDescriptor(key: "timeStamp", ascending: true)
var sortByTime = allMessages.sortedArrayUsingDescriptors([timeStampSortDescriptor])
println("\(sortByTime)")
return sortByTime
}
screen shot
http://i.stack.imgur.com/wcsSz.jpg

Answer 1

After some research i did made a solution as following
First this extension is very good and my way is depends on it
https://stackoverflow.com/a/27369380/5188737
If anyone have better solution or clean
I will appreciate if you can post it here
I'm sorry there's no comments
func loadMessages(){
if chatRoom!.messages.count > 0{
var i = 0
var tempMsgDate:NSDate?
var chatMessage:ChatMessage?
for message in chatRoom!.getAllMessages(){
let msg = message as! Message
if i == 0{
tempMsgDate = msg.timeStamp
chatMessage = ChatMessage(incoming: msg.income, text: msg.message, sentDate: convertNSDateToString(msg.timeStamp))
i++
}else{
//if the tempMsgDate (which is the first of the same
//date in the nsarray)
if checkIfSameDayDate(tempMsgDate!,date2: msg.timeStamp){
var tempDate = msg.timeStamp.time
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "HH:mm"
let date = dateFormatter.dateFromString(tempDate)
println("loadmessages method: \(date?.time)")
chatMessage = ChatMessage(incoming: msg.income, text: msg.message, sentDate: msg.timeStamp.time)
}else{//after he got to different date it save it as
//first of same date to follow
tempMsgDate = msg.timeStamp
chatMessage = ChatMessage(incoming: msg.income, text: msg.message, sentDate: convertNSDateToString(msg.timeStamp))
}
}
var msgCollection:[ChatMessage] = [ChatMessage]()
msgCollection.append(chatMessage!)
chat.loadedMessages.append(msgCollection)
}
}
}
func convertNSDateToString(date:NSDate) -> String{
let dateString = date.date + " " + date.time
println("in convert: \(dateString)")
return dateString
}
func checkIfSameDateFromSendMSGAndReciveMSG(date:NSDate) -> Bool{
for message in chatRoom!.getAllMessages(){
let msg = message as! Message
if msg.timeStamp.date == date.date{
return true
}
}
return false
}
//checks if the date1 equal to date2
func checkIfSameDayDate(date1:NSDate,date2:NSDate) -> Bool{
if date1.date == date2.date{
return true
}
return false
}