1
00:00:00,560 --> 00:00:01,940
So welcome back again.

2
00:00:01,940 --> 00:00:07,640
In this lesson we're going to talk about a new eye popping over presentation and that's essentially

3
00:00:07,640 --> 00:00:14,930
a kind of Segway that makes one view controller to appear over the other one although it is possible

4
00:00:14,930 --> 00:00:17,360
to use a UI Popova as in iPhone.

5
00:00:17,360 --> 00:00:23,750
We use them primarily for iPod interfaces because there's more space and you can actually see verities

6
00:00:23,750 --> 00:00:26,540
appeared on top of the other view controller.

7
00:00:26,600 --> 00:00:31,150
So let's go ahead into export and develop one and get a sense of how we do that.

8
00:00:31,220 --> 00:00:34,670
And when I start a new application I'm going to accommodate you.

9
00:00:34,680 --> 00:00:42,850
I pop over app and then the moment my UI pop all the tabloids I'm going to change the simulator type

10
00:00:42,860 --> 00:00:49,460
to be a part any type of iPod that would do for now I'm just going to leave that iPod sixth generation

11
00:00:50,760 --> 00:00:53,660
and the next thing I need to do I'm going to head into this storyboard.

12
00:00:53,720 --> 00:01:01,320
And in here I'm going to assume that I have my view shown as an iPod view something like that.

13
00:01:01,620 --> 00:01:04,480
And then you know I'm going to assume that they have a button.

14
00:01:04,530 --> 00:01:11,990
So it's have a by then I'm going to play see it maybe here right in the center.

15
00:01:12,000 --> 00:01:18,830
Actually that means I mean truth little bit more gets rid of that.

16
00:01:18,830 --> 00:01:23,310
So here's my by then and by then I'm going to give it a different background color.

17
00:01:23,330 --> 00:01:28,530
Maybe like that and it says tap to pop.

18
00:01:28,910 --> 00:01:32,350
And the thing I want to happen is I want to press this button.

19
00:01:32,360 --> 00:01:34,950
I want a boy pop over to appear.

20
00:01:35,090 --> 00:01:42,620
And once that one appears I want to have something in there that changes a value in my main view contract

21
00:01:42,950 --> 00:01:43,790
which is this one.

22
00:01:44,210 --> 00:01:48,500
So to do that the first thing I need is I need a new view controller.

23
00:01:48,540 --> 00:01:55,460
So I'm going to go in here say I have a new view controller and this new view controller I'm actually

24
00:01:55,460 --> 00:02:03,200
going to go to the attributes of it and say its size is not in fact it's rather a freeform one so you

25
00:02:03,200 --> 00:02:12,200
can actually go in here in the dimensions and manually change its size so your size is maybe 300 by

26
00:02:12,200 --> 00:02:13,100
300.

27
00:02:13,370 --> 00:02:19,380
So I make them much smaller of your controller because I don't want to cover the entire screen.

28
00:02:19,430 --> 00:02:23,850
So this new view controller may be a make its back on to be the same color.

29
00:02:23,870 --> 00:02:25,300
Something like that.

30
00:02:25,640 --> 00:02:32,700
And then I'm going to go ahead and say from my button top to pop I'm going to make a Segway to here.

31
00:02:32,820 --> 00:02:37,550
And that Segway is actually going to be of the type present as pop over.

32
00:02:38,090 --> 00:02:45,020
So now I have that Segway that presents this view controller as a pop over and if I select my Segway

33
00:02:45,050 --> 00:02:48,380
I can see that they have this set as a pop over.

34
00:02:48,410 --> 00:02:53,210
There are directions that I will talk to you about in a second and I'm going to give it an identifier

35
00:02:53,210 --> 00:02:53,620
as well.

36
00:02:53,660 --> 00:03:01,690
I'm going to say my Segway I.D. now could actually run the application right now and see what we get

37
00:03:01,690 --> 00:03:02,530
and let's do that.

38
00:03:02,530 --> 00:03:09,940
Just let me get a sense of what happens up until this point if we just have a Segway of the type you

39
00:03:10,010 --> 00:03:17,150
pop over a presentation with a view controller that is a smaller than the regular sized if I type on

40
00:03:17,150 --> 00:03:17,470
you.

41
00:03:17,510 --> 00:03:24,110
We see that my view controller appears here on the top left corner and it doesn't really stay true to

42
00:03:24,110 --> 00:03:30,020
the values that we suggested the values of being 300 by 300 pixels.

43
00:03:30,020 --> 00:03:35,620
So let's go ahead and modify all of these things manually so we know exactly what is going to show up

44
00:03:35,920 --> 00:03:39,890
and we know exactly what size is going to have sought to do that.

45
00:03:39,890 --> 00:03:44,900
I'm going to go to my view controller and in my view controller I need to call for a method that is

46
00:03:45,170 --> 00:03:49,510
preparing for a segue ways because this is after all another Segway.

47
00:03:49,630 --> 00:03:55,280
So I'm going to say prepare for saving and it might prepare for a Segway I'm going to go ahead and say

48
00:03:55,370 --> 00:04:03,770
if Segway dot identifier laws that I.D. Of course you don't really have to do that because in year we

49
00:04:03,770 --> 00:04:05,290
only have one Segway.

50
00:04:05,300 --> 00:04:08,600
But the real application you might have multiple one of those.

51
00:04:08,600 --> 00:04:09,920
So I'm going to do it for now.

52
00:04:09,920 --> 00:04:13,660
But if you only had one Segway then you don't need to bother with that.

53
00:04:13,700 --> 00:04:19,040
So the first thing I'm going to do is I'm going to say let let's call it the V.C. and we have to get

54
00:04:19,040 --> 00:04:22,060
the same way that destination view controller.

55
00:04:22,190 --> 00:04:28,910
And we have to make that of a certain type simply because we don't know what is the type of this view

56
00:04:28,910 --> 00:04:29,890
controller.

57
00:04:29,900 --> 00:04:35,150
So for that I'm going to actually have to make a new view controller class I'm going to say command

58
00:04:35,240 --> 00:04:43,520
and that's going to be a Coco touch class of the type you I view controller and I'm going to call that

59
00:04:43,520 --> 00:04:45,280
pop fuel controller.

60
00:04:45,740 --> 00:04:49,310
So I have a view controller it's called pop view controller.

61
00:04:49,370 --> 00:04:52,720
I don't want anything in here actually I want to get rid of everything.

62
00:04:53,900 --> 00:05:00,170
And what I want to do is I want to go to my storyboard and assign that to be the class for the little

63
00:05:00,170 --> 00:05:01,100
of your controller.

64
00:05:01,100 --> 00:05:05,690
So for this view controller it's actually called Pop view controller.

65
00:05:06,140 --> 00:05:08,360
So we've got that part taken care of.

66
00:05:08,360 --> 00:05:13,110
Now I'm going to go back to the view controller and say in preparation for a Segway.

67
00:05:13,120 --> 00:05:18,680
Get the V C to be as a pop view controller.

68
00:05:18,680 --> 00:05:21,980
Because I know there's going to be of that type anyway.

69
00:05:22,040 --> 00:05:29,150
Now the next thing I need to do is I need to find a content size for this pop view controller.

70
00:05:29,180 --> 00:05:38,170
So I'm going to go ahead and say let's have a v c and I'm going to say preferred content size.

71
00:05:38,240 --> 00:05:45,520
I'm going to say that it's a C G size of our 300 and 300 the numbers that you want.

72
00:05:45,740 --> 00:05:50,030
So we're setting those values to be exactly 300 by 300.

73
00:05:50,030 --> 00:05:54,950
Now so far everything we have done has been on setting the view controller itself.

74
00:05:54,950 --> 00:05:58,670
We haven't done anything on the pop over controller.

75
00:05:58,670 --> 00:06:03,710
The controller that actually makes sure your view appears on top of another view.

76
00:06:03,710 --> 00:06:08,900
So to do that I'm actually going to go ahead and say let and I'm going to call it controller.

77
00:06:09,020 --> 00:06:16,870
I'm going to say that becomes a V.C. pop over view presentation controller so I essentially find the

78
00:06:16,870 --> 00:06:24,610
pop over presentation controller of this view controller and then I'm going to say controller dot Daggett

79
00:06:24,970 --> 00:06:31,350
which is of the type you pop over presentation controller that I get to be self.

80
00:06:31,380 --> 00:06:36,080
And since I'm delegating to here I obviously have to have that protocol conform to.

81
00:06:36,090 --> 00:06:45,580
So I'm going to say it's called the UI pop over presentation controller delegate so I conform to that

82
00:06:45,580 --> 00:06:46,780
delegate as well.

83
00:06:46,940 --> 00:06:50,140
And now I can actually change the settings of this controller.

84
00:06:50,230 --> 00:06:55,670
So the first thing I'm going to do is I'm going to say controller dot source view.

85
00:06:55,690 --> 00:06:58,010
It becomes self that the view.

86
00:06:58,060 --> 00:07:00,710
So it appears from this view controller.

87
00:07:00,910 --> 00:07:06,550
So the next thing I want to set is I want to set in which direction does the controller actually appear.

88
00:07:06,550 --> 00:07:18,310
So I'm going to say controller dot permit that method our direction becomes a UI I pop over arrow direction

89
00:07:18,730 --> 00:07:26,680
dot up and that essentially means that I want my UI pop over to appear at the bottom of something whatever

90
00:07:26,710 --> 00:07:27,640
that triggers it.

91
00:07:27,640 --> 00:07:32,880
In this case being my button now the next thing is actually quite important somehow.

92
00:07:32,950 --> 00:07:34,030
Tricky.

93
00:07:34,030 --> 00:07:40,900
And that's about the Verdi you want the arrow to appear and based on that everything yes finds its place.

94
00:07:40,900 --> 00:07:47,950
So that's essentially called controller dot source rect and this for select is essentially the location

95
00:07:47,950 --> 00:07:50,500
where you won the arrow to appear from.

96
00:07:50,860 --> 00:07:53,370
Let me first show you what I mean by that.

97
00:07:53,380 --> 00:07:57,580
And then I'm going to you know play around with the numbers so you can see it a little bit better.

98
00:07:57,940 --> 00:08:01,250
So I'm going to say there's a siege erect and is God.

99
00:08:01,330 --> 00:08:03,390
All of these four values.

100
00:08:03,880 --> 00:08:07,930
I don't want its width and height to have any value so the 0 1 0.

101
00:08:07,930 --> 00:08:11,460
So there's just one location for the Exo feet.

102
00:08:11,470 --> 00:08:15,090
I'm going to say let it be in the center of the button.

103
00:08:15,190 --> 00:08:17,240
The button that is calling it.

104
00:08:17,260 --> 00:08:25,010
So for that I actually have to get my Sander and say here's let's just put it in a button.

105
00:08:25,010 --> 00:08:31,400
So let's say my button becomes sender as you.

106
00:08:31,400 --> 00:08:37,710
I buy then because I know it is a button anyway so I'm going to say get the button from the button.

107
00:08:37,730 --> 00:08:40,420
I want to find its center.

108
00:08:40,700 --> 00:08:42,870
And it's centered I want to get X off it.

109
00:08:43,160 --> 00:08:48,590
So that is the location that they want for the X and I want the very same thing or a very similar thing

110
00:08:48,590 --> 00:08:49,290
for the Y.

111
00:08:49,820 --> 00:08:56,420
So I won the source straight to appear from the center of my by then in both X and Y and they don't

112
00:08:56,420 --> 00:08:58,270
have any Veit or heights with them.

113
00:08:58,730 --> 00:09:03,310
Let's go ahead and run this application up until now and then we get a better sense of what this source

114
00:09:03,330 --> 00:09:11,940
select is actually doing so now with my app is on if I tap on here you will see that the arrow actually

115
00:09:11,940 --> 00:09:18,750
appears from the center of this button and that is essentially what this source strict means.

116
00:09:18,750 --> 00:09:25,980
If I wanted the arrow to appear on the lower left corner of the button I would say my button dot frame

117
00:09:26,940 --> 00:09:35,310
dot origin dot X that is the X of it and then I would go ahead and see for the value of it make it my

118
00:09:35,310 --> 00:09:35,850
button.

119
00:09:35,870 --> 00:09:40,550
Center y and then I would add the height of my button to it as well.

120
00:09:40,740 --> 00:09:48,650
I would say plus my button dot bounds dot height so I would add that much to it.

121
00:09:48,650 --> 00:09:53,560
Let me get a little bit of a space in here and then you ran for the via Ft.

122
00:09:53,580 --> 00:09:55,590
I will actually put the origin of it.

123
00:09:55,680 --> 00:10:03,570
So this essentially means the top left corner in terms of the Y plus the height of the button which

124
00:10:03,600 --> 00:10:08,400
essentially translates into the lower left corner.

125
00:10:08,670 --> 00:10:10,110
Let's see if that is true.

126
00:10:10,130 --> 00:10:10,550
It's rich.

127
00:10:10,550 --> 00:10:17,730
Show me the pop over in the lower left corner of the bar then now when the application runs.

128
00:10:17,730 --> 00:10:23,330
So now when I tap in here I will see that it appears from the lower left.

129
00:10:23,370 --> 00:10:28,260
I don't know if you can see the arrow it has a has a white little thing which is a little difficult

130
00:10:28,260 --> 00:10:34,020
to see for they could do they could actually change my background color so we could see that one a little

131
00:10:34,020 --> 00:10:37,880
bit easier while I'm in the storyboard and changing the background.

132
00:10:37,890 --> 00:10:40,110
This fixed a few other things as well.

133
00:10:40,200 --> 00:10:44,180
You want the masses to pass between these two view controllers.

134
00:10:44,260 --> 00:10:51,060
Someone going here and say I have a button in the new View Controller in their pop view controller on

135
00:10:51,060 --> 00:10:51,590
this one.

136
00:10:51,600 --> 00:10:59,550
It actually has a maybe a white background and it says send message.

137
00:11:01,620 --> 00:11:02,310
OK.

138
00:11:02,430 --> 00:11:06,270
And the next thing I'm going to do is I'm actually going to set all the constraints for it.

139
00:11:06,310 --> 00:11:11,880
I'm going to say ad all missing constraints and then I'm going to go ahead and say there is a label

140
00:11:11,880 --> 00:11:15,710
in here and this is the one that is going to receive the message.

141
00:11:15,720 --> 00:11:20,860
So I'm going to place third Labor in here say my label is a bit larger.

142
00:11:21,120 --> 00:11:23,680
And it also has a white background.

143
00:11:23,940 --> 00:11:31,200
And now I have to set the outlets for both of these items and I also have to set the delegation pattern

144
00:11:31,200 --> 00:11:31,700
for them.

145
00:11:32,140 --> 00:11:38,600
So I'm going to go in here and say in my main view controller This is my labor.

146
00:11:38,730 --> 00:11:48,330
So this is called My labor in my other view controller in the pop view controller I'm going to go ahead

147
00:11:48,330 --> 00:11:55,650
and say This one is actually an action that says send message.

148
00:11:55,680 --> 00:12:00,240
Action.

149
00:12:00,630 --> 00:12:05,000
So then I'm going to go to the pop view controller and say yeah.

150
00:12:05,040 --> 00:12:07,200
I actually have a protocol.

151
00:12:07,620 --> 00:12:11,750
I usually put this in a separate file but it doesn't really matter in here.

152
00:12:11,760 --> 00:12:21,390
So when I say pop action that I get and only has one function that says send the message and the message

153
00:12:21,390 --> 00:12:27,210
of it has an impact text which is a string of course.

154
00:12:27,470 --> 00:12:31,230
And since it is in the protocol we don't need the body of the function.

155
00:12:31,350 --> 00:12:35,000
And now my pop view controller it has a delegate.

156
00:12:35,160 --> 00:12:43,770
So I'm going to go ahead and say variable delegate after type pop action delegate.

157
00:12:43,770 --> 00:12:52,740
And every time that the send the message is called do this say self that delegate dot sends the message

158
00:12:53,070 --> 00:12:55,620
and the message says from Pop.

159
00:12:55,740 --> 00:13:00,660
Just like what we have done many many many times before with the delegation patterns.

160
00:13:00,660 --> 00:13:09,090
So now this view controller and this protocol essentially are ready to send a message to the delegation.

161
00:13:09,090 --> 00:13:15,780
The only thing is left for me to do is go to my view controller in here when I find the V.C. of the

162
00:13:15,780 --> 00:13:23,730
type view controller I'm going to say we see that delegate becomes a self and since I'm trying to delegate

163
00:13:23,760 --> 00:13:31,200
this view controller as this kind of delegation I need to make sure that this thing is also their pop

164
00:13:31,260 --> 00:13:35,680
action that they get is one of the protocols were conforming to it.

165
00:13:36,180 --> 00:13:38,890
So my view controller conforms with that as then.

166
00:13:39,180 --> 00:13:45,630
And then it's telling me that if you are trying to conform to this you must include that function and

167
00:13:45,630 --> 00:13:51,630
that function is called I think send the message and I'm going to say every time you receive a message

168
00:13:51,630 --> 00:13:53,040
showing it on my labor.

169
00:13:53,490 --> 00:14:02,900
So my labor that text becomes input text whatever value you find from whoever has called the delegation.

170
00:14:02,910 --> 00:14:08,490
Now before I run the application I want to quickly change something else as well and that is I want

171
00:14:08,490 --> 00:14:13,100
to come in here and say very we see the source rectangle.

172
00:14:13,110 --> 00:14:15,010
I want it to be at the center.

173
00:14:15,240 --> 00:14:19,050
So my by then Dart Center.

174
00:14:19,050 --> 00:14:25,060
That X and for the value of it I want it to be my by then that center.

175
00:14:25,060 --> 00:14:29,610
That's why I want to show right at the bottom of my button.

176
00:14:29,790 --> 00:14:37,860
And then I want to push it down maybe as much as maybe a half of the half of the height or any other

177
00:14:37,860 --> 00:14:40,550
number that you can just manually place in there.

178
00:14:40,560 --> 00:14:45,470
I don't want to appear on top of my by then because right now then we place person.

179
00:14:45,480 --> 00:14:48,400
It actually appears right at the bottom of it.

180
00:14:48,420 --> 00:14:53,850
And I went up here down in here and not in the center like the last time.

181
00:14:53,850 --> 00:15:00,390
So with that in mind if you go ahead then we rerun our application we should have it up appearing right

182
00:15:00,390 --> 00:15:05,540
at the bottom of the button and it should actually interact with the view as well.

183
00:15:05,550 --> 00:15:13,050
So if I go here and I zoom a little bit if I pop it appears here and then if I have to send my message

184
00:15:13,140 --> 00:15:20,250
it sends a message to here which is essentially the goal of having a pop over a view controller controlling

185
00:15:20,250 --> 00:15:22,560
something in here.

186
00:15:22,650 --> 00:15:24,290
So that's almost about it.

187
00:15:24,300 --> 00:15:29,020
How to have a pop over a controller and how to communicate between the two of them.

188
00:15:29,030 --> 00:15:33,270
There is one other thing that I'm just going to show you I'm not going to really do it because it doesn't

189
00:15:33,270 --> 00:15:42,120
work on this application and that is something that we call controller dot bar by then IDM and you use

190
00:15:42,120 --> 00:15:49,940
this essentially instead of using a source correct if you are going to call your controller from a bar

191
00:15:49,950 --> 00:15:57,000
by then IDM from your navigation bar or from your bottom bar if you want your controller to appear from

192
00:15:57,030 --> 00:16:04,590
a certain bar by then item then you call this one which essentially overrides the source rect and makes

193
00:16:04,590 --> 00:16:12,510
sure that your controller shows up from that particular item on your bar and that's you know useful

194
00:16:12,510 --> 00:16:17,250
in situations where you're using a navigation bar or something of the source.

195
00:16:17,340 --> 00:16:18,630
So that's about it.

196
00:16:18,660 --> 00:16:22,610
Let's keep it up to here and we'll move on to our next lesson.