GameOn! - Saved Games In-Depth (Part 1)YouTube↗  IA↗(long shot)
Science & Technology  30.2K views 196 likes 8 dislikes   15 Sep 2014
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If you're not saving your user's game in the cloud,
如果你没有把用户的游戏存在云端服务器 If you're not saving your user's game in the cloud,
I can guarantee you are losing players
我恐怕 当他们换了新玩具后就会产生用户流失 I can guarantee you are losing players any time they get a new device.
any time they get a new device. Because no matter how awesome your game is-- and I'm sure
这是因为 我相信 不管你设计的游戏有多棒 Because no matter how awesome your game is-- and I'm sure
it is-- nobody wants to start all over again from level one
都没人愿意重新安装一遍 再从新手开始 it is-- nobody wants to start all over again from level one
when they reinstall it.
再玩一次 when they reinstall it.
I'm Todd Kerpelman, and while there are many Cloud Save
我是Todd Kerpelman 鉴于互联网上 I'm Todd Kerpelman, and while there are many Cloud Save
solutions out there, the one I'm here to talk to you
已有众多云端存储方案 我这边要告诉你的是 solutions out there, the one I'm here to talk to you
about today is the one you get for free with Google Play
如今你在Google Play上可以免费得到同样 about today is the one you get for free with Google Play
game services.
游戏服务 game services.
So the Play Games team has upgraded their old Cloud Save
负责游戏的团队已经更新了他们的旧版云端存储的 So the Play Games team has upgraded their old Cloud Save
featuring in a major way.
很多方面 featuring in a major way.
Heck, it's such a big update we have renamed
呵 它的改动太大 我们甚至把名称都改了 Heck, it's such a big update we have renamed
this feature from Cloud Save to Saved Games-- in the cloud.
现在 它唤做云游 不再叫做云存了 this feature from Cloud Save to Saved Games-- in the cloud.
And we've got a fancy new icon to go with it.
我们也为此设计了很多独特的图标 And we've got a fancy new icon to go with it.
It's got an arrow in it and everything.
图标里面有个箭头 可代表的却是一切 It's got an arrow in it and everything.
But it doesn't just have a new icon.
别认为它只是换了一个新图标 But it doesn't just have a new icon.
This new Saved Games feature includes a bunch
它涵盖了很多东西 This new Saved Games feature includes a bunch
of improvements over the old Cloud Save.
基于旧版云存的改进 of improvements over the old Cloud Save.
The biggest of which is that you can now save blobs of data
最大变化之处是 你现在可以存储很大包的数据 The biggest of which is that you can now save blobs of data
up to 3 meg large.
最大可至3M up to 3 meg large.
That is a lot of game data.
那可是老大一堆的数据呵 That is a lot of game data.
And while you were limited to four slots earlier,
在以前 你会被限制在四位数字以内的 And while you were limited to four slots earlier,
now you can have as many as you want.
现在 你几乎可以为所欲为了 now you can have as many as you want.
Your app will now have a Saved Games badge in the Play Store
现在 游戏保存之后 在Play Store里你就会有一个云游牌 Your app will now have a Saved Games badge in the Play Store
so everybody will know that they can
这样每个人都会知道自己能够 so everybody will know that they can
save their progress as they're playing.
把正在消遣的游戏进度保存起来 save their progress as they're playing.
You can also add metadata to your saved game,
你还可以在你存储的云游上添加媒体数据 You can also add metadata to your saved game,
like a description and a cover image.
像是 一个具体描述和载体图像 like a description and a cover image.
All of which will make your saved game
这些使得你的云游 All of which will make your saved game
show up very nicely in the Play Games app, or within your own game.
在游戏程序或是你自己的游戏里有个很棒的展示 show up very nicely in the Play Games app, or within your own game.
I mean, look at that beautiful saved game.
我说 瞅瞅这些漂亮的存储云游 I mean, look at that beautiful saved game.
Don't you want to click on it?
难道你不想去点击一下他们吗 Don't you want to click on it?
I know I do.
我知道我是忍不住 I know I do.
You know, players see this in the Play Games app.
你知道 玩家一看到游戏程序中的这些东东 You know, players see this in the Play Games app.
They're reminded-- oh, yeah.
他们就想起来了 哦 They're reminded-- oh, yeah.
I was at this level.
我玩到这个级别了 I was at this level.
I had just gotten this cool new sword.
我刚刚得到了这个酷爱的新宝剑 I had just gotten this cool new sword.
I'm going to keep playing from where I left off.
我可以从上次退出点继续玩下去 I'm going to keep playing from where I left off.
So these features are great, but along with these new features
哦这些新功能太棒了 可是这些新花样也需要 So these features are great, but along with these new features
comes a new way of handling the saved game
游戏提供一种新的云游数据存储办法 comes a new way of handling the saved game
data and new ways of managing conflicts.
和处理冲突的新途径 data and new ways of managing conflicts.
And I always find that when dealing with this stuff--
我常常发觉 处理这些数据 And I always find that when dealing with this stuff--
particularly when it comes to debugging-- it's
特别是它处于调试状态的时候 particularly when it comes to debugging-- it's
best to have a decent understanding of how things
最好要对它的原理有个深度的理解 best to have a decent understanding of how things
work under the hood instead of it being some mystery
而不是看外表的那些神秘的黑盒子 work under the hood instead of it being some mystery black box.
black box. So let's take a peek behind the scenes here.
所以 让我们来看一看 荧幕之后的东东 So let's take a peek behind the scenes here.
You just might learn something.
你可能会学到一些东西 You just might learn something.
So the first thing you need to understand
那么你要理解的第一件事 So the first thing you need to understand
is that Saved Games are represented internally
就是云游是在内部代表的是 is that Saved Games are represented internally
as an object we call a snapshot.
一个对象 我们叫做快照 as an object we call a snapshot.
The snapshot contains the metadata, including things
快照这个对象包含了元数据 包含的东西有Metadat 其中含有 The snapshot contains the metadata, including things
like the description of a file, a cover image, the amount
文件的描述 封面图片 游戏时间 like the description of a file, a cover image, the amount
of time you've played, and a local timestamp,
的长短 还有个当地时间印 of time you've played, and a local timestamp,
as well as the giant blob of saved game data.
当然还有一堆游戏数据 as well as the giant blob of saved game data.
Saved Games are powered by Google Drive,
Saved Games 是由Google Drive提供 Saved Games are powered by Google Drive,
and when you are storing or loading
正当你把云游存储或上传 and when you are storing or loading
these Saved Games to the Cloud, the best way
到云端服务器上 最好使用Google Drive 账户 these Saved Games to the Cloud, the best way
to picture what's going on is that somewhere in the user's
来记录现在的状态 to picture what's going on is that somewhere in the user's
Google Drive account, there is a hidden folder
那里有个隐藏的文件夹 Google Drive account, there is a hidden folder
just for your application where the snapshot is being stored.
专为你的应用程序所建 快照就存在那里 just for your application where the snapshot is being stored.
And as these snapshots are being saved inside the folder,
这些快照就是存储在这个文件夹里面 And as these snapshots are being saved inside the folder,
they're given a name just like any other file.
你可以像往常一样给他们取名 they're given a name just like any other file.
And just like in a normal file, these names
也和其他普通文件一样 这些名字 And just like in a normal file, these names
are the primary way we identify these snapshots
是我们分清你的应用程序所需的这些快照的基本途径 are the primary way we identify these snapshots to your application.
to your application. Your user, however, never sees this name.
然而 你的用户 却无法看到这些名字 Your user, however, never sees this name.
They'll see your snapshot's description, cover image,
他们可以看到这些快照的描述 封面图片 They'll see your snapshot's description, cover image,
and maybe some other metadata, but this name
以及其他的元数据 但是这个名字 and maybe some other metadata, but this name
is never surfaced to them.
是从不与他们相关联的 is never surfaced to them.
It's really just an identifier for your application to use.
这些名字 仅仅是为你的应用程序使用快照时的辨别使用的 It's really just an identifier for your application to use.
Now you can query and examine any
现在你可以询问并测试任何 Now you can query and examine any
of the metadata whenever you'd like.
元数据 在你需要的任何时候 of the metadata whenever you'd like.
But it's important to know that to read the saved data,
但是 有一件非常重要的事情 就是要了解清楚它是如何读取云游数据 But it's important to know that to read the saved data,
or to write to it-- even if you're writing to a brand
或如何写入云游数据的 甚至如果你正在存入一个编号 or to write to it-- even if you're writing to a brand
new snapshot-- you must open the snapshot first.
新快照之前 你必须首先打开这个快照 new snapshot-- you must open the snapshot first.
Again, I guess it's kind of analogous to accessing
重复一下 我猜它类似有些程序语言那样去操作 Again, I guess it's kind of analogous to accessing
local files in a language like say Python.
本地文件 如Python语言 local files in a language like say Python.
You could find out the last modified time of a file,
你能够找到最后修改的文件 You could find out the last modified time of a file,
but if you want to read or write to it,
但当你想要读取或改写该文件时 but if you want to read or write to it,
you're going to need to call open on it to get the file handle.
你将需要将它调用出来 取得该文件的控制权限 you're going to need to call open on it to get the file handle.
Now most of this time, this open command--
现在的绝大多数情况 这个打开指令 这并不太令人激动 Now most of this time, this open command-- it's not very exciting.
it's not very exciting.
荧屏之后有什么事情发生呢 What's happening behind the scenes
What's happening behind the scenes is that your device is downloading all this game
那就是你的设备正在下载该游戏的所有东东 is that your device is downloading all this game
data associated with your snapshot metadata
即是与你快照相关的元数据 data associated with your snapshot metadata
if it hasn't done so yet, and then tells your game
如果它没有去做这些事 然后会告诉你的游戏 if it hasn't done so yet, and then tells your game
when it's done.
何时它会做完 when it's done.
But this command does get complicated
但是该指令不会变得复杂化 But this command does get complicated
when we handle conflicts, so stay tuned.
当我们处理冲突的时候 保持调整状态 when we handle conflicts, so stay tuned.
Now with that in mind, let's look at a simple situation
现在记得以上规则后 让我们看一个简单情况 Now with that in mind, let's look at a simple situation
where we're going to load an existing save game
即当我打算调入一既有的云端游戏之时 where we're going to load an existing save game
from the Cloud, make some changes, and then save it again.
做一些修改 然后再次存储 from the Cloud, make some changes, and then save it again.
Loading or opening a saved game starts
调入或打开云端游戏的动作就会开始启动 Loading or opening a saved game starts
by opening up the snapshot as identified by its name.
通过辨别快照的名称来打开它 by opening up the snapshot as identified by its name.
Now if you're only ever dealing with a single save game
现在 如果你正在处理一个单一的云端游戏 Now if you're only ever dealing with a single save game
that you're going to be saving and loading,
你将要去做存入和上载的动作 that you're going to be saving and loading,
you could get away with hard coding this file
你可以能够成功地将这个文件编码 you could get away with hard coding this file
name as a constant somewhere.
在某处把它作为一个常数来命名 name as a constant somewhere.
Remember, these saved games are being saved in the user's drive
记住 这些云端游戏会在用户的硬盘里存储起来 Remember, these saved games are being saved in the user's drive
account in a folder that is reserved just
登录在一个专为你的游戏所保留的文件夹里 account in a folder that is reserved just for your application.
for your application. So you don't need to worry about making these file names unique.
因此 你勿须担心 文件命名的唯一性是否有问题 So you don't need to worry about making these file names unique.
You don't have to call it com.example.myap p.savedGame.userId.
你不必非得输入 com.example.myap p.savedGame.userId You don't have to call it com.example.myap p.savedGame.userId.
You could just call it something as unoriginal
你可以输入一些很稀疏平常的词 You could just call it something as unoriginal
as like, SavedGame, or, I don't know, Dan, I guess.
就像 SavedGame 或者 我也不太确定 Dan 我猜的 as like, SavedGame, or, I don't know, Dan, I guess.
In Android Java land, loading and opening a snapshot
在 安卓 Java 系统里 加载和打开一个截屏 In Android Java land, loading and opening a snapshot
is accomplished using the Games.Snapshots.open method.
通过使用 Games.Snapshots.open method 这个语句就可轻松实现 is accomplished using the Games.Snapshots.open method.
In the iOS world, you're going to be
在 iOS 系统里 你将会使用 In the iOS world, you're going to be
using the openWithFileName, conflictPolicy,
openWithFileName, conflictPolicy, completionHandler method 这个语句 using the openWithFileName, conflictPolicy, completionHandler method.
completionHandler method. And in the C++ world, you're going to be using the snapshot
在C++系统里 你将会使用截屏 And in the C++ world, you're going to be using the snapshot
manager's open command.
管理器的打开指令 manager's open command.
The implementations do vary slightly,
这些执行代码之间的确有轻微的变化 The implementations do vary slightly,
but you'll notice in all cases, you
但是你会注意到在所有这些情况里 but you'll notice in all cases, you
provide a name of the snapshot.
你给截屏赋予了一个名称 provide a name of the snapshot.
And by the end of the process, you're
在程序的结尾 And by the end of the process, you're
left with the snapshot that has been opened
截屏就会被打开 left with the snapshot that has been opened
and is now available for reading or writing.
而且可以读写数据 and is now available for reading or writing.
Reading the contents of a snapshot
通过调取一个二级指令 Reading the contents of a snapshot
is accomplished by calling a second command
可以实现读取截图信息 is accomplished by calling a second command
on the open snapshot, or snapshot metadata object.
这个指令指向截图本身 或者截图的元数据上 on the open snapshot, or snapshot metadata object.
In Android land, this is readFully.
在安卓领域 这个指令是 readFully In Android land, this is readFully.
In iOS, it's readWithCompletionHandler.
在iOS系统 它是 readWithCompletionHandler In iOS, it's readWithCompletionHandler.
And in C++, it's read or readBlocking.
而在C++里 它是 read or readBlocking And in C++, it's read or readBlocking.
Again, this is a separate command,
而且 这是一个独立的指令 Again, this is a separate command,
because while we can load the snapshot data into memory right
因为当我们就要加载截图数据到缓存里的时候 because while we can load the snapshot data into memory right
away, we probably don't want to have
我们很可能没想过非得加载一个高达3M的游戏数据 away, we probably don't want to have
to do this for a 3 meg chunk of game data
除非我们必须这样做 to do this for a 3 meg chunk of game data until we really have to.
until we really have to. And in all cases, you're going to get back
而且在所有的情况下 你都将要得到 And in all cases, you're going to get back
a byte array, some NSData, or a byte vector
一个 字节数组 一些NSData 或者一个byte vector a byte array, some NSData, or a byte vector
that you can then pass along to your game and process as necessary.
然后你有必要将它们应用在你的游戏和程序里 that you can then pass along to your game and process as necessary.
Now let's say that we've gone and opened your snapshot
现在我们可以说我们已经打开了你的截图 Now let's say that we've gone and opened your snapshot
and read in some data and passed it along to our game.
而且读取了一些数据并导入了我们的游戏中 and read in some data and passed it along to our game.
And now the player has made some progress
现在玩家已经完成了一些游戏进度 And now the player has made some progress
and wants to save their game.
而且想要保存他们的游戏 and wants to save their game.
To do this in Android, you're going
想在安卓系统里实现这个的话 你需要 To do this in Android, you're going
to need to write this game data back
把这个游戏的数据重新写入 to need to write this game data back
onto the same snapshot you opened earlier.
你早前打开的那个相同的截图里 onto the same snapshot you opened earlier.
You're not going to be creating a new one.
你不必再重新创建一个新的截图 You're not going to be creating a new one.
What you are going to do is create a new snapshot metadata
你需要做的是创建一个截图元数据的 What you are going to do is create a new snapshot metadata
change object.
变更数据包 change object.
So let's ignore the rest of the snapshot
因此让我们忽略截图的其余部分 So let's ignore the rest of the snapshot
here and just look at this new object.
我们只需要关注这个新的数据包 here and just look at this new object.
The metadata change object is basically
元数据变更数据包基本上是 The metadata change object is basically
a list of elements in the metadata,
元数据的一个要素清单 a list of elements in the metadata,
such as a description, time plate, or cover image,
比如一个描述信息 时间牌 或者封面图像 such as a description, time plate, or cover image,
that are different between this version of the snapshot
更新版本的截图里的这些信息与 that are different between this version of the snapshot
and what was up there before.
上一版所呈现的有所不同 and what was up there before.
Basically, the saved game API will look at this change object
基本上 所保存的游戏API将会关注这一个变更数据包 Basically, the saved game API will look at this change object
and kind of overlay it on top of your old metadata
并且在某种程度上覆写于你的旧的元数据之上 and kind of overlay it on top of your old metadata
to create this new metadata object.
以建立新的元数据包 to create this new metadata object.
Once you've done this, you'll call commit and close
一旦你完成了这一步 你将命令安卓设备调取执行和关闭指令 Once you've done this, you'll call commit and close
on Android devices where you'll pass
并在这些设备上 on Android devices where you'll pass
in the old snapshot with the new data,
使用新的数据以及元数据变更数据包 in the old snapshot with the new data,
and the metadata change object right there.
去更新旧的截图 and the metadata change object right there.
On iOS and C++, it's slightly different in that you do create
在iOS系统及C++中 有一点小小的差别 On iOS and C++, it's slightly different in that you do create
a new game data object instead of writing over the old one,
你将会创建一个新的游戏数据包而不是覆写旧的 a new game data object instead of writing over the old one,
but you're still creating a metadata change object as well.
但是你也会仍然创建一个元数据变更数据包 but you're still creating a metadata change object as well.
And then all that gets sent up.
那么这时候一切都建立完毕 And then all that gets sent up.
You'll take the current snapshot metadata
你会使用目前这个截图元数据 You'll take the current snapshot metadata
and call commitMethod on it.
并对其调用 commitMethod 命令 and call commitMethod on it.
You'll do something similar in C++.
对于C++你需要采用类似的做法 You'll do something similar in C++.
And in both cases, you can see we have our currently
在这两种情况下 你能够看到我们拥有了我们最新的 And in both cases, you can see we have our currently
open snapshot, our metadata change object, and our new data.
开启截图 我们的元数据变更数据包 以及我们的新数据 open snapshot, our metadata change object, and our new data.
Once you've saved all this information
一旦你保存了所有这些信息 Once you've saved all this information
and committed your snapshot, it is now considered closed.
并执行了你的截图 那么就大功告成了 and committed your snapshot, it is now considered closed.
And you'll want to reopen it again
你将会想要再打开它一次 And you'll want to reopen it again
if you want to write more data to it.
如果你想要对它写入更多的数据的话 if you want to write more data to it.
So easy peasy, right?
很简单 是不是 So easy peasy, right?
OK, so let's look at some situations
好的 让我们看看某些 OK, so let's look at some situations
where things can get a little funky.
时髦的情况 where things can get a little funky.
What do you do if this is a brand new player, or somebody
如果有一个新玩家 或者某个以前从来没有 What do you do if this is a brand new player, or somebody
who's never signed in to game services before,
登陆过游戏服务器的人 who's never signed in to game services before,
and they try to open a saved game file that doesn't exist?
他们试图打开一个根本不存在的保存游戏的文件 你将会怎么做 and they try to open a saved game file that doesn't exist?
Actually, this isn't really a problem.
事实上 这不算是一个真正的问题 Actually, this isn't really a problem.
On Android, one of the arguments you pass to snapshots that open
在安卓系统里 你赋给截图的语句里其中有一条打开命令 On Android, one of the arguments you pass to snapshots that open
is a createIfNotFound Boolean.
是 createIfNotFound Boolean is a createIfNotFound Boolean.
Set this to true, and you're all set.
把这个值设置为 true 你就全都设置好了 Set this to true, and you're all set.
You simply open up a snapshot with no data in it.
你仅仅打开了一个没有任何数据的截图 You simply open up a snapshot with no data in it.
In iOS and C++, you don't even need to do that.
在 iOS和 C++里 你甚至不需要那样做 In iOS and C++, you don't even need to do that.
It'll create an empty file by default.
它将会默认创建一个空的资料夹 It'll create an empty file by default.
Then you simply treat this empty snapshot
这时你仅仅把这个空的资料夹当做任何一个其他的截图来对待 Then you simply treat this empty snapshot like any other snapshot.
like any other snapshot. It's just one that has no data, and all of its metadata
它仅仅是这样一个资料夹 它不含任何数据 而且所有元数据都设为 It's just one that has no data, and all of its metadata
is set to default values and/or null, or I guess nil on iOS.
缺省值和/或 null 或者我猜在iOS系统里是nil is set to default values and/or null, or I guess nil on iOS.
Simply by updating this snapshot with your first set
很简单地利用你的首次游戏设置更新这个截图 Simply by updating this snapshot with your first set
of game data and a reasonable metadata change object,
和合理的元数据变更数据包 of game data and a reasonable metadata change object,
you can get this looking like a real snapshot in no time.
你可以很快就使得这个截图类似一个真正的截图 you can get this looking like a real snapshot in no time.
So up until now, we've talked as though you're just
那么直到现在 我们已经谈论了 So up until now, we've talked as though you're just
loading and saving the same game file over and over again.
你是如何反复的加载和保存同一个游戏的文件 loading and saving the same game file over and over again.
But let's say you want to manage more than one saved game file.
现在 让我们谈谈你如何管理多个保存的游戏文件 But let's say you want to manage more than one saved game file.
How do you do that?
你会怎么做呢 How do you do that?
Well for starters, you're not going
开始的时候 你不必 Well for starters, you're not going
to be hard coding your snapshot name.
硬编码你的截图名称 to be hard coding your snapshot name.
You're going to need to figure out
你需要指出 You're going to need to figure out
which snapshot to save and load at run time.
在运行时保存和加载哪一个截图 which snapshot to save and load at run time.
And to do that, you're going to need
为了实现那样的功能 你将需要赋予用户 And to do that, you're going to need
to give the player the ability to pick which saved game they
选择的能力 选择哪一个存档的游戏 to give the player the ability to pick which saved game they
want to use, create a saved game, and so on.
以及创建一个游戏存档 等等 want to use, create a saved game, and so on.
Luckily, the UI to handle all this
很幸运的说 管控这一切的用户界面 Luckily, the UI to handle all this
is provided for you by the game services libraries.
会由游戏服务实验室提供给你 is provided for you by the game services libraries.
When you want to present a user with a list of saved games,
如果你想要提供一个游戏存档的列表给用户 When you want to present a user with a list of saved games,
you can call up our UI.
我们的用户界面可以给你想要的 you can call up our UI.
Now there are several settings you can tweak with this UI,
现在这个用户界面有好几个设置供你选择 Now there are several settings you can tweak with this UI,
either as parameters in Android and C++,
有的是安卓和C++里的参数 either as parameters in Android and C++,
or as delegate methods in Objective C.
有的是C语言里的代理方法 or as delegate methods in Objective C.
These settings will let you decide how many saved games
这些设置将会让你能够定义有多少游戏存档 These settings will let you decide how many saved games
to show in this UI, whether or not to give the user
可以显示在这个用户界面里 是否给予用户 to show in this UI, whether or not to give the user
the ability to delete a saved game, and most importantly,
删除存档的权限 最重要的是 the ability to delete a saved game, and most importantly,
whether or not the user has the ability to create a new save.
用户是否有创建新的存档的权限 whether or not the user has the ability to create a new save.
Now if I'm a user, and I click one of these existing saves,
现在如果我是一个用户的话 当我点击其中一个存在的存档 Now if I'm a user, and I click one of these existing saves,
it'll hit a callback in your game, and in that callback,
你的游戏里会触发一个回调 在那个回调里 it'll hit a callback in your game, and in that callback,
you'll get back the name of the snapshot to open.
你将能够找回这个截图的名字并开启游戏 you'll get back the name of the snapshot to open.
You can now just use this name to open up the correct snapshot
现在你仅仅用这个名字就可以就像以前一样打开正确的截图 You can now just use this name to open up the correct snapshot
just like before, and you're ready to go.
现在你可以尽情享受游戏的快乐 just like before, and you're ready to go.
But let's say I'm a user, and I want to create a new save game.
但是如果我是一个玩家 而且我想要创建一个新的游戏存档 But let's say I'm a user, and I want to create a new save game.
I would click the Save New Game button,
我会点击 保存新游戏 按钮 I would click the Save New Game button,
and your app then gets a callback that this button was clicked.
你的APP会得到一个该按钮被点击的回调 and your app then gets a callback that this button was clicked.
At this point, it's up to you to basically create a new snapshot
这时 它取决于你通过请求打开一个 At this point, it's up to you to basically create a new snapshot
by asking to open a saved game with a name that does not
拥有全新名字的游戏存档去创建一个新的截图 by asking to open a saved game with a name that does not exist yet.
exist yet. So how do you decide what to name it?
那么你决定给它一个什么名字 So how do you decide what to name it?
It's kind of up to you.
这似乎取决于你 It's kind of up to you.
You could use a timestamp-- that's pretty good.
你可以使用时间戳 那个真的很不错 You could use a timestamp-- that's pretty good.
You could use a random number appended
你可以使用附加在时间戳 You could use a random number appended
to a timestamp-- I guess that's even better.
上的随机数 我想这个会更加好 to a timestamp-- I guess that's even better.
You could query the names of all the other snapshots,
你可以搜索所有其他截图的名字 You could query the names of all the other snapshots,
examine them all, and then increment
验证它们 然后为新的截图增加一个数字 examine them all, and then increment a number for the new one.
a number for the new one.
那也同样有用 That'd work too.
That'd work too. The only trick is that it needs to be
唯一的诀窍是这需要 The only trick is that it needs to be
unique for this particular player.
与这个特定的玩家唯一对应 unique for this particular player.
Doesn't need to be all that memorable since,
命名无需过于令人印象深刻 Doesn't need to be all that memorable since,
as you just saw, you're always going
正如你刚刚所见 你只要 as you just saw, you're always going
to get that file name from the UI that our library provides.
从我们实验室提供的用户界面得到文件名即可 to get that file name from the UI that our library provides.
It will never be surfaced to the user.
因为它永远不会被我们的用户看到 It will never be surfaced to the user.
They're never going to need to refer to it by name.
用户也永远不会需要用名字作为参考 They're never going to need to refer to it by name.
However you do it, as soon as you request a snapshot
然而你给它命名了 一旦你需要一个 However you do it, as soon as you request a snapshot
with a file name that doesn't exist yet,
带有从未出现过的名字的截图的时候 with a file name that doesn't exist yet,
you get back an empty snapshot that you can then use as your new game.
你会得到一个空的截图以作为你的新游戏 you get back an empty snapshot that you can then use as your new game.
Keep in mind that the intended flow for all this
你要记住这些流动 Keep in mind that the intended flow for all this
is like what you might see at the beginning
就像你在主机游戏开始前看到的一样 is like what you might see at the beginning of a console game.
of a console game. I'm at the main menu, I want to start a game,
我现在在主界面 我想要启动游戏 I'm at the main menu, I want to start a game,
and the game lets me pick from continuing from a previously
游戏界面提示我是选择从一个先前存档的游戏继续玩 and the game lets me pick from continuing from a previously
saved slot or starting a completely new game.
还是完全开始一个新的游戏 saved slot or starting a completely new game.
It's not really intended to let the user switch saved
这个并非真的倾向于让用户更换 It's not really intended to let the user switch saved
game slots mid-game or duplicate their progress or anything
存档的游戏或是完全复制他们的进程或是任何其他类似的行为 game slots mid-game or duplicate their progress or anything like that.
like that. I mean, I suppose you could hack it to work that way,
我的意思是 假设你可能破解它的工作方式 I mean, I suppose you could hack it to work that way,
but it's going to feel a little clunky.
但它会觉得有点笨重 but it's going to feel a little clunky.
OK, you've gotten this far.
好的 你已经明白了这一点 OK, you've gotten this far.
Give yourself a pat on the back because you
给自己一个鼓励因为你已经完成了初级课程 Give yourself a pat on the back because you have completed level one!
have completed level one! OK, stop patting because this is all good background,
好了 别拍了别破坏我们良好的摄制环境 OK, stop patting because this is all good background,
but the real test comes when you just
但是真正的考验来了 but the real test comes when you just
start detecting and resolving snapshot conflicts.
你马上要开始检查并解决截图冲突问题 start detecting and resolving snapshot conflicts.
And for that, you're just going to need
对于这个问题 你需要观看我们的下一个视频 And for that, you're just going to need to watch our next video.
to watch our next video. Hopefully this link will be live by the time
希望这个链接在你们观看这个视频的时候 Hopefully this link will be live by the time
you're watching this, but if not, check back soon
会显示出来 如果没有 赶快回头查看一下 you're watching this, but if not, check back soon
because it will be.
因为它一定会出现 because it will be.
So thanks for watching, gang.
好的感谢观看 So thanks for watching, gang.
Feel free to follow me on G+ or Twitter,
请关注我的G+或者推特 Feel free to follow me on G+ or Twitter,
and I will see you soon for part two.
在第二部分我会很快与大家再见 and I will see you soon for part two.
Our exciting conclusion!
我们激动人心的结论 Our exciting conclusion!
Dun-dun-dun.
Dun-dun-dun. Dun-dun-dun.
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