3_801-855

Author: ApolloZhu

subtitles/3. Swift Programming Language.srt

@@ -3205,222 +3205,277 @@ it means that setting this var is private, but getting it
 801
 00:40:39,270 --> 00:40:43,639
 is not private. So you allow people to get the var, access
+并不是私有的。所以你允许人们得到这个变量，访问
 
 802
 00:40:43,708 --> 00:40:46,676
-it, but they can not set it. That's you point of view,
+it, but they can not set it. That's you purview,
+这个变量，但是不能给它赋值。那是你的权利
 
 803
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 that's your internal implementation sets it.
+你的内部实现可以给它赋值
 
 804
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 We'll see a good example of that in concentration.
+我们会在翻牌游戏里看到个好的例子
 
 805
 00:40:51,583 --> 00:40:54,850
 And then there's fileprivate. Fileprivate in a Swift file,
+然后是 fileprivate，文件内私有。在一个 Swift 文件里
 
 806
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 you can have multiple classes and structs in there,
+你可以有多个类和结构体
 
 807
 00:40:56,921 --> 00:40:58,955
 you don't have to be just one class which is what we've done
+不需要想我们现在这样一个文件只有一个类
 
 808
 00:40:59,024 --> 00:41:02,158
 so far and fileprivate means anything in that in that
+而 fileprivate 的意思是，任何在那个
 
 809
 00:41:02,227 --> 00:41:06,162
 file can access each other, right. So classes,
+文件里的都可以互相访问，也就是类
 
 810
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-four classes in there, it can each others methods, okay,
+all classes in there, it can each others methods, okay,
+所有的都可以访问 fileprivate 的方法（和变量）
 
 811
 00:41:09,734 --> 00:41:12,501
 that's what file private means. Okay, the other ones
+这就是 fileprivate 的意思。好，其他的
 
 812
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 are public and open, those are for framework writers.
+public 和 open，这两个是给框架作者用的
 
 813
 00:41:15,273 --> 00:41:18,007
 Public means that people outside the framework
+public 的意思是编写框架以外的人
 
 814
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 can call it. Doesn't make sense for outside your app,
+也可以调用它。在你的程序外使用是说不通的
 
 815
 00:41:21,512 --> 00:41:23,746
 that would never happen, so outside your framework.
+这也不可能发生，所以是在框架外使用
 
 816
 00:41:23,815 --> 00:41:26,416
 And open means not only can people outside your framework
+open 的意思是不仅框架外可以
 
 817
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 call it but they could sub class that class,
+调用，他们还可以继承那个类
 
 818
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 override your methods all that stuff,
+重写你的方法等
 
 819
 00:41:31,388 --> 00:41:35,124
 so open is like wide open, okay. We don't care about that
+所以 open 是很开放的权限。但我们不用管
 
 820
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 cuz we're only, we're not doing frameworks, right. So
+因为我们只写程序，不会写框架，好吧，所以
 
 821
 00:41:38,430 --> 00:41:41,030
 we're gonna focus on private of the various privates.
+我们主要关注这几种 private
 
 822
 00:41:41,099 --> 00:41:43,999
 A good strategy to use these is pretty much put private on
+最好的做法是基本都用 private
 
 823
 00:41:44,068 --> 00:41:46,969
 anything until you're sure, yeah I want someone else to be
+除非你确信说我想要其他人
 
 824
 00:41:47,038 --> 00:41:48,904
 able to call this method somewhere.
+在其他地方能够调用这个方法
 
 825
 00:41:48,973 --> 00:41:53,509
 Right that's by default you should make things private. So
+所以默认你应该让所有的都是 private
 
 826
 00:41:53,578 --> 00:41:56,312
 let's look a concentration, what it would look like to
+所以让我们看看翻牌游戏，它看起来是什么样的
 
 827
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-put access control and concentration and
+put access control on concentration and
+如果我们给玩牌游戏加上访问权限的话
 
 828
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 pay attention here because I'm gonna require in all your
+你要注意了，因为我要求你所有的
 
 829
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 homeworks going forward that you mark things properly.
+之后的作业里正确地标记访问权限
 
 830
 00:42:04,222 --> 00:42:05,922
 I want you to mark things private if they should be
+我想要你把私有的都标记为 private
 
 831
 00:42:05,990 --> 00:42:08,224
 private. Okay, cuz I wanna just make sure that you
+因为我想要确保你
 
 832
 00:42:08,292 --> 00:42:11,895
 understand what this is all about. So let's go back here
+理解了这是什么。那我们回到这里
 
 833
 00:42:13,565 --> 00:42:16,665
 to Xcode. Let's start with our ViewController.
+到 Xcode 里，从 ViewController 开始
 
 834
 00:42:16,734 --> 00:42:19,134
 Okay, we have three classes, or three data structures,
+好，我们有三个类，准确说是三个数据结构
 
 835
 00:42:19,203 --> 00:42:21,304
 our ViewController, Card, and Concentration. So let's start
+我们的 ViewController，Card 和 Concentration。那我们从
 
 836
 00:42:21,372 --> 00:42:27,210
 with ViewController. So this right here is our model. So
+ViewController 开始改。所以这里的这个是我们的模型
 
 837
 00:42:27,278 --> 00:42:31,514
 would we want our model to be public, to be not private?
+我们想要模型是公开的，非私有的吗？
 
 838
 00:42:31,583 --> 00:42:33,582
 Well that depends, actually.
+其实那个不一定
 
 839
 00:42:33,651 --> 00:42:36,319
 It depends of what your model is and how it works. Often,
+那取决于你的模型是什么，怎么工作的。一般来说
 
 840
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 ViewControllers models are public by public I mean
+ViewController 是公开的。我这个公开不是 public
 
 841
 00:42:40,325 --> 00:42:43,492
 non-private. We're inside an app so forget about public and
+意思是非私有。我们写的是一个 App，所以你可以忽略 public 和
 
 842
 00:42:43,561 --> 00:42:47,096
 open keywords. I mean, when I say public I mean non-private.
+open 这两个关键字。所以我所谓的 public/公开是指非私有
 
 843
 00:42:47,165 --> 00:42:49,932
 So a lot of times you do because you give a model to
+而大部分时候都是这样的，因为你把一个模型提供给
 
 844
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 a view controller and it displays it,
+视图控制器，然后控制器就显示它
 
 845
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 that's what it does. But that is not the case here. This one
+这就是他的工作。但我们这里不是这样的情况。这里
 
 846
 00:42:54,939 --> 00:42:58,240
 wants to be private. And the reason it wants to be private
+我们想要是 private 的。它应该是私有的
 
 847
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 is because the number of pairs of cards in the game is
+原因是 numberOfPairsOfCards
 
 848
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 intimately tied to the UI, okay the number of
+游戏里卡片的对数是和 UI 捆绑着的
 
 849
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 cards we have in the UI. So if we wanted to make
+是我们 UI 理由的卡的对数。如果我们想要
 
 850
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 this public then we'd also have to make something public
+让它公开的的话，我们也需要让另一个公开的
 
 851
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 to specify the number of card buttons that we allow and
+来指定我们允许的显示卡片的按钮的个数
 
 852
 00:43:13,425 --> 00:43:15,391
 we don't do that currently,
+但我们现在并不是这样的
 
 853
 00:43:15,460 --> 00:43:18,127
 that's something that is in our little scene and
+那现在是我们在 Interface Builder
 
 854
 00:43:18,195 --> 00:43:21,430
 interface builder, so we don't do it. So we keep this, we
+的场景里设置的，所以我们不这样做。所以我们保持这个
 
 855
 00:43:21,499 --> 00:43:25,067
 keep this private. How about number of pairs of cards?
+让他就是 private 的。那 numberOfPairsOfCards 呢？
 
 856
 00:43:25,136 --> 00:43:28,271