WEBVTT 00:00.050 --> 00:00.650 Hello guys. 00:00.650 --> 00:02.030 Welcome to the next video. 00:02.030 --> 00:05.660 So in this one I'm going to delete this game object. 00:05.660 --> 00:08.630 And also I want to delete this Playerprefs example. 00:08.810 --> 00:11.330 Also let's clean this up a bit. 00:11.330 --> 00:12.830 Let's take these two. 00:13.420 --> 00:15.430 Drag them into scripts folder. 00:21.650 --> 00:22.940 In the scripts folder. 00:22.940 --> 00:25.490 I think it's time to make a UI folder. 00:26.030 --> 00:26.750 UI. 00:29.670 --> 00:32.490 And we can take it all here. 00:32.910 --> 00:33.360 Cool. 00:33.360 --> 00:37.650 Now we have a goal of saving information about progression of the levels. 00:37.980 --> 00:43.350 Every time we finish the level, we want to unlock next level. 00:43.350 --> 00:46.380 So let's go to the game manager. 00:47.340 --> 00:52.530 And first of all, I want to make a variable because we're going to use it a couple of times in different 00:52.530 --> 00:53.160 methods. 00:53.160 --> 00:56.460 Private int next level index. 00:58.160 --> 01:04.940 Now let's go here and say that next level index is equals to current level index plus one. 01:05.390 --> 01:06.200 Nice. 01:06.230 --> 01:11.510 Now let's go down to the methods we created in the last video over here. 01:11.630 --> 01:14.150 First of all we do need a local variable anymore. 01:14.150 --> 01:15.860 We have it saved globally. 01:15.860 --> 01:21.080 And also I think we need to arrange this a bit because level finished method will do a couple of things. 01:21.080 --> 01:24.680 Not only load the next scene, but also it's going to save information and so on. 01:24.680 --> 01:30.590 So better we make something like private void load next scene. 01:31.790 --> 01:32.600 All right. 01:32.600 --> 01:38.600 And we can take this code from here, paste it in here just like that. 01:38.600 --> 01:43.220 And then in the level finished we're going to call load next scene. 01:43.220 --> 01:46.190 Actually I could just do extract method anyway. 01:46.190 --> 01:53.060 Also I want to move this above over here and maybe lock this because we know how they work. 01:53.060 --> 01:54.530 We don't need to do anything here. 01:54.530 --> 02:00.620 Now when we finish in the level we load in the next level, and at the same time we could save information 02:00.620 --> 02:02.600 about next level being unlocked. 02:02.600 --> 02:07.460 So when you go to level selector, you see that this level is unlocked because you played this before. 02:07.460 --> 02:08.720 This is how we're going to do that. 02:08.720 --> 02:10.670 We're going to say Playerprefs. 02:11.760 --> 02:13.350 Dot set integer. 02:14.010 --> 02:15.360 We're going to type level. 02:15.360 --> 02:20.100 Then plus next level index plus unlocked. 02:20.100 --> 02:22.050 And we're going to give it a value of one. 02:22.050 --> 02:26.940 So this will save the number one which will use as a boolean just like I showed you in the last video. 02:26.940 --> 02:31.050 Now let's go ahead and complete all of the levels so we can see the progression. 02:31.320 --> 02:34.050 And we can use it to create the buttons. 02:34.050 --> 02:35.550 I'm going to go to New Game. 02:38.240 --> 02:40.880 And I'm going to quickly complete the levels. 02:42.550 --> 02:43.540 Two. 02:46.580 --> 02:47.990 No no no. 02:49.510 --> 02:50.950 And one more. 02:54.220 --> 02:54.790 Good. 02:54.790 --> 03:01.420 So now, if I'm not mistaken, I did call this method in every level and I unlocked next level every 03:01.420 --> 03:02.020 time. 03:02.020 --> 03:05.710 Now let's go to Level Selection script. 03:07.250 --> 03:08.030 And over here. 03:08.030 --> 03:13.430 It might be a little bit of overkill, but I think it's better this way because we can, um, we can 03:13.430 --> 03:15.110 see information in the inspector. 03:15.110 --> 03:23.000 So I'm going to make serialized field private, uh, bool array, uh, levels unlocked. 03:23.270 --> 03:32.510 And we need to go and do something like private void load levels, load levels info. 03:33.020 --> 03:33.800 All right. 03:34.100 --> 03:35.540 Now we want to. 03:36.490 --> 03:36.970 Yet. 03:36.970 --> 03:38.200 Levels amount. 03:38.200 --> 03:39.610 I'm going to copy this. 03:40.150 --> 03:43.270 Go here and then I'm going to do. 03:44.020 --> 03:45.520 Uh levels unlocked. 03:45.910 --> 03:48.760 Array equals to new boolean of levels amount. 03:48.760 --> 03:50.140 So we're going to make an array. 03:50.350 --> 03:54.010 And it will be equals to the size of the levels amount we have. 03:54.070 --> 03:57.700 Then I'm going to do for loop for the levels amount. 03:57.700 --> 04:01.810 Actually before we do any check let's make it equals to one over here. 04:01.810 --> 04:02.020 Right. 04:02.020 --> 04:04.090 So we start from the first one and zero one. 04:04.090 --> 04:05.170 We're just going to ignore. 04:05.170 --> 04:12.490 Now let's go and make a boolean a local variable level unlocked equals to Playerprefs. 04:12.490 --> 04:22.960 Get int of level plus I plus unlocked and default value will be zero. 04:23.500 --> 04:27.970 And if this one is equals to one, it means level is unlocked. 04:27.970 --> 04:28.960 And then we're going to do. 04:28.990 --> 04:35.620 If level unlocked, then levels unlocked with the I equals to true. 04:36.040 --> 04:41.800 And also, no matter what the progress was before, we need to be sure we unlocked the first level. 04:41.800 --> 04:47.770 So I'm going to go ahead here and I'm going to do levels unlocked one equals to true. 04:48.100 --> 04:48.730 All right. 04:48.730 --> 04:50.590 Now let's go to start method. 04:50.590 --> 04:57.280 And before we create level buttons let's call this load levels info I'm going to save it. 04:57.280 --> 04:59.980 Let's go back to unity and see the result. 05:00.010 --> 05:05.530 Now back in unity let me select New Game and let me assign level selection over here so I can switch 05:05.530 --> 05:06.790 to level selection. 05:06.790 --> 05:08.140 Let's go to play mode. 05:09.540 --> 05:11.340 I'm going to click New Game. 05:11.340 --> 05:14.160 And on the level selection we can see that. 05:15.310 --> 05:18.130 We can see that all three booleans are unlocked. 05:18.490 --> 05:19.300 Nice. 05:19.330 --> 05:21.490 Now let's go to. 05:21.490 --> 05:23.740 Now let's go to UI level selection. 05:24.040 --> 05:29.590 And over here we want to check if level is unlocked because if it was not unlocked there is no point 05:29.590 --> 05:30.790 of creating a button. 05:30.790 --> 05:32.500 So this is how are we going to do that? 05:32.500 --> 05:35.590 I think it's better to make a private. 05:36.950 --> 05:43.790 Private bool method is level unlocked, just so it's a bit easier to read everything, and this one 05:43.790 --> 05:48.740 going to return me levels unlocked with the I boolean. 05:49.250 --> 05:53.930 Just that sorry, not I um, this should be. 05:54.690 --> 05:56.430 Int level index. 05:56.430 --> 05:58.320 And here we pass level index. 05:58.350 --> 05:59.340 Okay nice. 05:59.340 --> 06:00.750 So now we have this boolean. 06:00.750 --> 06:08.550 And we can go here and do if is level unlocked with a I equals to false then return. 06:08.550 --> 06:10.020 And we're going to interrupt the for loop. 06:10.020 --> 06:11.970 We're not going to create any more buttons. 06:11.970 --> 06:16.050 Now let me go back to unity. 06:21.390 --> 06:25.770 I'm going to go to edit and I'm going to click clear all Playerprefs. 06:25.770 --> 06:29.010 So it's going to clear all of the saved information. 06:29.040 --> 06:30.750 Now we're going to go to play mode. 06:34.040 --> 06:36.560 A new game and we have only level one. 06:36.860 --> 06:38.420 Now let's go further. 06:38.420 --> 06:40.370 Let's complete one of the levels. 06:41.290 --> 06:43.690 So now we have two levels unlocked. 06:43.690 --> 06:45.220 We're going to go to play mode. 06:47.580 --> 06:52.560 New game, and we can see that only two buttons were created, even though we have three levels in the 06:52.560 --> 06:53.100 game. 06:53.100 --> 06:54.180 Okay, perfect. 06:54.180 --> 06:55.680 Now we have a simple goal. 06:55.680 --> 07:01.260 We need to check if player has any progression in the game and if he has a progression. 07:01.260 --> 07:07.470 We need to know what the level he played last and then we need to load that level if he presses the 07:07.470 --> 07:11.910 continue button, and also if there is no progression, we need to hide the continue button itself. 07:11.910 --> 07:19.470 So how it's going to be done, first of all, uh, let's go to uh, Game Manager. 07:20.610 --> 07:29.610 And I'm going to make a new player pref here player pref set int last completed level number. 07:29.610 --> 07:34.260 And here we're going to pass next level index I guess. 07:34.380 --> 07:38.790 Or maybe let's just save it as next level number because we press continue and we're supposed to play 07:38.790 --> 07:39.570 the next level. 07:39.570 --> 07:43.830 So I guess let's type continue level number. 07:44.250 --> 07:47.040 Yeah I guess it serves the purpose very well. 07:47.040 --> 07:51.060 Now let's save this and let's go to main menu. 07:53.130 --> 07:55.020 And we're gonna make. 07:55.820 --> 07:57.950 We're going to make a reference to the button. 07:57.950 --> 08:03.920 Let's do serialized field, private game object, and a new button. 08:04.340 --> 08:05.120 Nice. 08:05.270 --> 08:07.850 Now we're going to go ahead and, um. 08:10.320 --> 08:11.400 Let me think a bit. 08:11.430 --> 08:13.110 We need some sort of a method. 08:13.140 --> 08:13.320 Right. 08:13.470 --> 08:14.040 Pull. 08:14.750 --> 08:17.540 As level progression. 08:18.440 --> 08:24.620 And this will return me a boolean of bool as level progression equals two. 08:24.650 --> 08:28.940 We need to take that line of code from a layer manager. 08:28.940 --> 08:32.000 I'm going to copy this so I don't make a mistake with the name. 08:32.000 --> 08:33.860 And over here I'm going to paste this in. 08:33.860 --> 08:36.980 But I'm going to change it from set to get int. 08:36.980 --> 08:38.930 And default value will be zero. 08:38.930 --> 08:43.940 And this will be true if it is bigger than zero. 08:44.360 --> 08:45.440 Simple as that. 08:46.760 --> 08:50.300 And then over here we're going to just return his level progression. 08:50.750 --> 08:51.440 Nice. 08:51.470 --> 08:58.580 Now we need to may now we want to use this reference to enable button in the start. 08:59.150 --> 09:02.630 Now we're going to use this boolean to enable continue button. 09:03.140 --> 09:04.730 In the start we're going to do this. 09:04.730 --> 09:10.580 If has level progression then continue button set active. 09:10.610 --> 09:11.270 True. 09:11.720 --> 09:12.620 Simple as that. 09:12.620 --> 09:14.420 Now let's go ahead and make this button. 09:14.420 --> 09:21.530 We need to go back to unity I'm going to take new game I'm going to duplicate this and move it up. 09:23.570 --> 09:27.470 Let's change it to continue. 09:28.510 --> 09:31.570 And here we're going to do continue. 09:31.600 --> 09:34.450 Probably we should do a different layout for buttons. 09:34.840 --> 09:37.390 But we're also going to have settings button later on. 09:37.570 --> 09:38.890 For now I'll place it here. 09:38.890 --> 09:39.580 It's okay. 09:41.160 --> 09:47.040 Now for this button we need the method that will load the last level in progression. 09:47.040 --> 09:50.160 So probably it's yeah, we can just make a method here. 09:50.160 --> 09:50.910 Why not. 09:51.150 --> 09:52.890 Let's make a method. 09:54.530 --> 10:06.110 Uh public void continue game and this will just do scene manager load scene with uh all we need the 10:06.110 --> 10:06.620 index. 10:06.620 --> 10:07.610 This will take long. 10:07.610 --> 10:08.270 Okay. 10:08.390 --> 10:10.280 Let's do curly brackets here. 10:10.790 --> 10:13.130 And we're going to do int level two. 10:13.130 --> 10:16.430 Load equals to I'm going to get this one. 10:18.670 --> 10:19.630 Okay. 10:19.750 --> 10:30.370 And over here we're going to do load scene level underscore level to load underscore plus level to load 10:30.370 --> 10:31.390 like that. 10:31.600 --> 10:32.440 Okay. 10:32.800 --> 10:34.480 It's a bit confusing I guess. 10:38.110 --> 10:41.230 I'll try to find a way to clean this up, but as of now, this should work. 10:41.650 --> 10:44.290 And let's drag Continue Field over here. 10:44.290 --> 10:49.030 And then on the continue button we're gonna switch to. 10:49.790 --> 10:50.540 UI. 10:52.350 --> 10:54.600 Continue game and just. 10:54.600 --> 10:55.080 That's it. 10:55.080 --> 10:57.660 Now let's disable this button by default. 10:57.660 --> 10:59.580 And I'm going to do file. 10:59.580 --> 11:02.130 Now edit clear all playerprefs. 11:02.130 --> 11:05.310 So if I'm not mistaken, now we're supposed to go to play mode. 11:05.310 --> 11:07.380 And there are going to be only new game. 11:10.370 --> 11:11.090 Yes. 11:11.090 --> 11:11.510 Okay. 11:11.510 --> 11:14.990 Now I'm going to go to New game and I'm going to complete one of the levels. 11:17.370 --> 11:19.020 So I've completed the level. 11:19.230 --> 11:20.250 This is all nice. 11:20.250 --> 11:24.180 Now let's say I'm on this level, and it's a bit difficult for me and I want to take some rest. 11:24.180 --> 11:26.580 So I decided to stop playing. 11:26.580 --> 11:30.150 I go out of the game, then I'm like, oh, I want to play again. 11:30.150 --> 11:31.710 So let's go to play mode. 11:31.710 --> 11:35.340 And here now we have a continue button. 11:35.340 --> 11:36.090 Cool. 11:36.090 --> 11:37.980 Now we can click this button. 11:37.980 --> 11:40.830 And if I'm not mistaken we're going to go to the second level. 11:40.920 --> 11:41.790 Continue. 11:41.790 --> 11:42.930 Yes okay. 11:42.930 --> 11:44.340 Now I'm going to go further. 11:46.280 --> 11:51.500 Complete another level and then I'm like, oh no, I need to go to eat some food. 11:51.500 --> 11:53.570 So I'm going to exit the play mode. 11:54.020 --> 11:55.130 Enter play mode. 11:56.410 --> 11:58.180 Now let's say I want to start new game. 11:58.180 --> 12:03.910 I can choose a level one, two, three because all of them are unlocked, or I can just click continue 12:03.910 --> 12:07.630 and I'm going to play from the last level I played. 12:07.990 --> 12:08.950 Perfect. 12:08.950 --> 12:09.850 Love it man. 12:09.850 --> 12:10.870 Love it so much. 12:10.870 --> 12:13.360 And also it's appearing there. 12:13.360 --> 12:17.500 We can see it's, uh, being enabled, but with a fade image. 12:17.500 --> 12:20.650 It's not going to be like that if you make it dark here. 12:22.390 --> 12:25.120 And go to play mode, then it's going to be. 12:26.060 --> 12:26.930 Just fine. 12:26.930 --> 12:27.770 Okay. 12:27.800 --> 12:28.730 Hello, guys. 12:28.730 --> 12:31.190 Before we finish this, let me show you a bug we have. 12:31.190 --> 12:36.830 So if you complete all of the levels and then you click continue button, it's going to give you an 12:36.830 --> 12:37.520 error. 12:37.700 --> 12:39.260 It's very easy to fix. 12:39.800 --> 12:41.180 You see I'm clicking continue. 12:41.180 --> 12:47.390 And we see level four could not be loaded because it has like we don't have this scene in the build. 12:47.390 --> 12:55.310 So this happens because we load scene with the get int continue level number and we set this continue 12:55.310 --> 12:57.020 level number integer. 12:57.020 --> 13:01.520 When we finish the game in the Game manager over here, this is what we do. 13:01.520 --> 13:04.400 And we set it to next level index no matter what. 13:04.400 --> 13:09.830 But if we don't have any more levels we still set it to the next level index. 13:09.830 --> 13:17.030 So we need to solve this somehow and we're going to go to this load next scene. 13:17.590 --> 13:19.630 And over here we have this info. 13:22.510 --> 13:24.760 Uh, we could use this. 13:24.760 --> 13:25.630 Really? 13:29.850 --> 13:31.860 But I want to have separate methods. 13:31.860 --> 13:35.790 I don't want to hide one method inside of another method. 13:35.790 --> 13:39.420 That's not what I want to do, but also I don't want to have duplicated functionality. 13:40.050 --> 13:40.710 Okay. 13:40.980 --> 13:42.360 Very simple to solve. 13:42.390 --> 13:44.490 Let's make this private bool. 13:44.490 --> 13:51.390 No more levels and this will just do this check for us. 13:52.430 --> 13:55.100 And it will return no more levels. 13:55.100 --> 13:57.320 And now we can use a method here. 13:57.320 --> 13:58.640 No more levels. 14:00.730 --> 14:01.690 And. 14:03.120 --> 14:04.200 Over here I'm going to do. 14:04.200 --> 14:09.150 If no more levels equals to false, then we can save this info. 14:09.480 --> 14:10.260 Perfect. 14:10.260 --> 14:15.300 And let's take these to like three lines of code. 14:15.300 --> 14:16.740 And let's extract method. 14:16.740 --> 14:20.970 And I'm going to do save level progression. 14:21.670 --> 14:24.610 Yeah, so it's a bit cleaner and organized. 14:24.640 --> 14:26.920 All right, I think I like it. 14:29.280 --> 14:35.070 Uh, let me show you everything so you can check it and compare it with yours. 14:36.790 --> 14:37.900 Like that. 14:40.890 --> 14:42.870 Oh my God, I cannot fit it into the screen. 14:44.110 --> 14:44.950 Like that. 14:45.950 --> 14:46.640 Yeah. 14:46.640 --> 14:48.470 Now I'm going to save everything. 14:48.470 --> 14:55.040 I'm going to clear the savings in the edit, and I'm going to try to run again and see if it works fine. 14:55.040 --> 14:58.370 Clear all Playerprefs go to play mode. 15:00.540 --> 15:03.900 Gonna start new game level one and let's just see it. 15:09.380 --> 15:10.430 Now we have end screen. 15:10.430 --> 15:14.060 I'm going to skip it and I'm going to click continue. 15:14.060 --> 15:16.670 And it loads me to the last level. 15:16.670 --> 15:17.690 All right. 15:18.170 --> 15:20.780 So this should be good I think logically it's okay. 15:20.780 --> 15:22.460 Like you continue into the last level. 15:22.460 --> 15:24.650 This is how it happens in other games I played. 15:24.650 --> 15:26.570 So I'm going to keep it like that I like it. 15:27.550 --> 15:29.560 Well, that's good for now. 15:29.560 --> 15:30.910 Let's go to the next video.