1 00:00:07,960 --> 00:00:09,960 Hey I'm back. 2 00:00:10,030 --> 00:00:15,640 Yeah I forgot something that is kind of important to teach you guys that I said I was going to and if 3 00:00:15,640 --> 00:00:22,630 you remember when we were going through our our message cell we talked about the time stamp and that 4 00:00:22,630 --> 00:00:23,750 I was going to get back to it. 5 00:00:23,920 --> 00:00:25,380 And then I forgot to. 6 00:00:25,690 --> 00:00:27,440 So yeah we're going to go over there right now. 7 00:00:27,460 --> 00:00:34,280 So strap in we're going to talk about some ISO 86 01 dates. 8 00:00:34,280 --> 00:00:35,260 All right. 9 00:00:35,890 --> 00:00:44,560 So the format that the server gives respect for dates is in the format called ISO 6 or 1. 10 00:00:44,860 --> 00:00:51,520 And so it's an international standard you can do some googling on it but basically this is how it comes 11 00:00:51,520 --> 00:00:51,790 back. 12 00:00:51,790 --> 00:00:53,290 We have. 13 00:00:53,740 --> 00:01:00,010 I mean it's kind of recognizable Here's your standard year month and day. 14 00:01:00,610 --> 00:01:06,480 Then we get into the hours minutes seconds and milliseconds. 15 00:01:07,030 --> 00:01:14,780 So this wouldn't be so bad to work with because Apple actually has a built in ISO 86 or one date for 16 00:01:14,780 --> 00:01:15,580 matter. 17 00:01:15,790 --> 00:01:22,660 But the problem is the built in one doesn't play well with milliseconds. 18 00:01:22,780 --> 00:01:28,270 So if we had just been given this right here then it be no problem we'd be able to convert this string 19 00:01:28,270 --> 00:01:34,330 into an ISO 86 or one date and then convert that directly to a date format that we're that we want to 20 00:01:34,330 --> 00:01:38,920 use but because we have the Millicent's on here we're going to have to do a little bit of a niggling 21 00:01:38,920 --> 00:01:44,270 with the string chopping off the end and then reopening the Z. 22 00:01:44,560 --> 00:01:49,240 So you know that's that's just just what we got to do so let's do it. 23 00:01:49,240 --> 00:01:52,690 First thing we're doing we're going to unwrap our our data. 24 00:01:52,710 --> 00:02:01,900 I'm going to say guard let ISO date equal the message time stamp. 25 00:02:02,080 --> 00:02:13,360 Else we're going to return and then we're going to say we're going do we want to turn this string into 26 00:02:13,740 --> 00:02:14,710 this string. 27 00:02:14,800 --> 00:02:21,310 So we want to chop off these last five parts of the parts of the string. 28 00:02:21,310 --> 00:02:21,740 OK. 29 00:02:21,970 --> 00:02:24,730 So we're going to do is we're going to fine. 30 00:02:25,000 --> 00:02:33,550 We're going to use a function called substring 2 and basically saying it'll take a string up to a specified 31 00:02:33,580 --> 00:02:34,600 index. 32 00:02:34,780 --> 00:02:37,390 So we need to tell it where to stop. 33 00:02:37,390 --> 00:02:45,430 So we're going to do that by saying that and equal ISO date dot index and to pick this one right here 34 00:02:45,430 --> 00:02:51,910 which returns it indicates that a specified distance from the given index is the we're going to start 35 00:02:51,970 --> 00:02:53,450 at the end. 36 00:02:53,470 --> 00:03:03,460 So I'm going to say so date dot and index so we're saying start here and then offset by 5 which in the 37 00:03:03,520 --> 00:03:05,450 backrest Arkan's minus 5. 38 00:03:05,770 --> 00:03:08,780 So start at the end and then backtrack 5. 39 00:03:08,800 --> 00:03:13,960 And now this right here is your end index. 40 00:03:13,960 --> 00:03:25,290 All right and then we're going to say ISO date is equal to ISO date dot substring up to and the end. 41 00:03:25,900 --> 00:03:32,100 So now this guy is this right here. 42 00:03:32,230 --> 00:03:36,160 We got rid of those last five by using substring to end. 43 00:03:36,160 --> 00:03:36,670 All right. 44 00:03:37,030 --> 00:03:46,390 So now we have a ISO 86 of one date format that is compatible with Apple's builtin formatter. 45 00:03:46,420 --> 00:03:52,200 So now we can say let ISO four matter equal I guess. 46 00:03:52,240 --> 00:03:55,450 Oh 86 so on it formatter. 47 00:03:56,350 --> 00:04:05,320 And we're going to change our string into an ISO 86 or one date for NC. 48 00:04:05,560 --> 00:04:09,670 Let chat date equal to ISO 49 00:04:12,570 --> 00:04:19,940 formatter start date from string and the string is ISO date. 50 00:04:20,740 --> 00:04:29,230 But we also need we have to have that Z on the ends see ISO date dot appending a string and that string 51 00:04:29,230 --> 00:04:32,160 is just the letter Z. 52 00:04:32,290 --> 00:04:39,590 OK so basically through all of this we've turned this string into that string. 53 00:04:39,940 --> 00:04:43,290 And that is something that we can use with this formatter. 54 00:04:43,680 --> 00:04:48,450 So now we have an ISO 86 of one date not a string but an actual date. 55 00:04:48,700 --> 00:04:54,860 And we can use another date formatted to turn that into something more readable for us. 56 00:04:55,000 --> 00:04:56,480 OK so we're going to say let. 57 00:04:56,740 --> 00:05:03,430 New format for equal date for matter. 58 00:05:03,670 --> 00:05:09,780 I can say new format for that date format. 59 00:05:09,790 --> 00:05:14,480 And now we can customize how we want our dates to look. 60 00:05:14,830 --> 00:05:17,660 And so what we're going to do is we're going to say hmm. 61 00:05:17,770 --> 00:05:22,160 So this is going to give us the abbreviated month format. 62 00:05:22,420 --> 00:05:30,730 I'm going to say for the day that we're going to get us the hour the minute and then the AM or PM. 63 00:05:30,950 --> 00:05:31,510 All right. 64 00:05:31,980 --> 00:05:34,750 So that's our that's what our formatters is going to spit us out. 65 00:05:34,960 --> 00:05:45,340 So now we're going to say if left final date is equal to chapt date which is an optional just because 66 00:05:45,340 --> 00:05:57,250 of how the ISO formatter works then we're going to say let a final date equal new formatted dot string 67 00:05:57,430 --> 00:05:58,000 from date. 68 00:05:58,000 --> 00:06:03,410 So now we're getting we're we're we're converting from a date to a string. 69 00:06:04,090 --> 00:06:15,280 And the date is final date and then we can actually set our time stamp label in our cell to this new 70 00:06:15,370 --> 00:06:18,610 labels and say time stamp label. 71 00:06:18,610 --> 00:06:25,110 That text is equal to final number 72 00:06:30,720 --> 00:06:35,360 that we're going to save that and let's see here what do we got going on here. 73 00:06:35,360 --> 00:06:36,930 This needs to be a bar. 74 00:06:37,060 --> 00:06:41,050 I was going to say this needs to be a bar right here guard bar. 75 00:06:41,060 --> 00:06:42,270 There we go. 76 00:06:42,290 --> 00:06:47,030 Let's get rid of this comment and let's try run on this. 77 00:06:47,120 --> 00:06:48,180 All right. 78 00:06:48,470 --> 00:06:49,280 OK. 79 00:06:49,290 --> 00:06:59,270 Two forty nine 2:56 15 looks like it is a work and it's work to 80 00:07:01,670 --> 00:07:03,280 1:53 a.m.. 81 00:07:03,290 --> 00:07:04,070 That's right. 82 00:07:04,070 --> 00:07:09,250 I'm still recording and editing videos at 2:00 a.m. for you guys. 83 00:07:09,260 --> 00:07:09,490 All right. 84 00:07:09,490 --> 00:07:19,100 Anyway so this is our final feature actually now so I won't forget you told you I was gonna teach you 85 00:07:19,100 --> 00:07:21,670 how to do this so I am. 86 00:07:21,810 --> 00:07:30,200 Yes so now I guess this is the conclusion to the chat app so you guys have had fun and I'll see you 87 00:07:30,200 --> 00:07:32,360 around Johnny be signing now.