blocks|key|802661|text|浏览一下苹果的Core+Data+tutorial。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|802662|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/iphone/library/documentation/DataManagement/Conceptual/iPhoneCoreData01/Introduction/Introduction.html^0|7|I|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Go through Apple's <a href="http://developer.apple.com/iphone/library/documentation/DataManagement/Conceptual/iPhoneCoreData01/Introduction/Introduction.html" rel="nofollow noreferrer">Core Data tutorial</a>.

blocks|key|1552034|text|苹果提供了documentation的tons和source+code来帮助你入门。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1552035|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/iphone/library/documentation/DataManagement/Conceptual/iPhoneCoreData01/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008305|1|http://developer.apple.com/iphone/library/documentation/Cocoa/Conceptual/CoreData/Articles/cdBasics.html#//apple_ref/doc/uid/TP40001650|2|http://developer.apple.com/iphone/library/samplecode/CoreDataBooks/Introduction/Intro.html|3|http://developer.apple.com/iphone/library/samplecode/iPhoneCoreDataRecipes/Introduction/Intro.html^0|5|D|0|J|4|1|O|6|2|V|4|3|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]|$A|V|B|W|1|X]|$A|Y|B|Z|1|10]|$A|11|B|12|1|13]]|C|$]]|$1|D|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]|P|$5|G|H|I|C|$J|Q]]]]

There are <a href="http://developer.apple.com/iphone/library/documentation/Cocoa/Conceptual/CoreData/Articles/cdBasics.html#//apple_ref/doc/uid/TP40001650" rel="nofollow noreferrer">tons</a> of <a href="http://developer.apple.com/iphone/library/documentation/DataManagement/Conceptual/iPhoneCoreData01/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008305" rel="nofollow noreferrer">documentation</a> and <a href="http://developer.apple.com/iphone/library/samplecode/CoreDataBooks/Introduction/Intro.html" rel="nofollow noreferrer">source</a> <a href="http://developer.apple.com/iphone/library/samplecode/iPhoneCoreDataRecipes/Introduction/Intro.html" rel="nofollow noreferrer">code</a> available from Apple to get you started.

blocks|key|802679|text|以下是我找到的一些最好的教程：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|802680|802681|Best+tutorial+I've+found|unordered-list-item|offset|length|802682|Another+good,+multipage+tutorial|802683|Very+good+explaination+of+concepts|802684|Apple+Doc,+might+help+with+the+concepts|802685|Little+Cheatsheet|802686|802687|至于你的问题：|802688|802689|我知道有一个协调器和一个上下文。我还了解到有状态管理。它们是如何协同工作的？|blockquote|802690|802691|802692|持久化存储协调器负责管理实际存储数据的位置，无论是XML还是SQLlite文件等等。协调器是抽象的，所以你不必担心后端是什么类型的存储。|802693|托管对象上下文是您与持久存储协调器进行交互的方式。把它想象成你的便签簿。您可以从托管对象上下文创建和修改托管对象。|802694|802695|我不明白如何存储，比方说，一个图像和一些字符串作为对象。假设我想稍后检索图像和字符串。我做什么好？|802696|802697|802698|如果您通读上面的一些教程，您将看到如何将对象从托管对象上下文中拉出。NSString将简单地存储为托管对象上的字符串属性，如下所示：|802699|[managedObject+setValue:@"TestString"+forKey:@"SomeStringProperty"];|code-block|syntax|javascript|802700|我对图像不是很确定，因为我以前从来没有在Core+Data中存储过图像。我知道任何可以序列化的东西都可以存储为可转换的属性。Here's+a+post+about+storing+UIImages+in+Core+Data|802701|802702|我在哪里保存我的状态？多么?|802703|802704|802705|您只需在托管对象上下文中调用“save”方法。如下所示：|802706|[context+save:&error]|802707|entityMap|0|LINK|mutability|MUTABLE|url|http://www.raywenderlich.com/934/core-data-tutorial-getting-started|1|http://iphoneinaction.manning.com/iphone_in_action/2009/08/core-data-part-1-an-introduction.html|2|http://cocoadevcentral.com/articles/000086.php|3|http://developer.apple.com/macosx/coredata.html|4|http://borkware.com/quickies/one?topic=Core%2520Data|5|http://www.iphonedevsdk.com/forum/iphone-sdk-development/42457-save-image-core-data.html^0|0|0|0|O|0|0|0|W|1|0|0|Y|2|0|0|13|3|0|0|H|4|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1Q|1D|5|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|27|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|29|8|@]|9|@$F|2A|G|2B|1|2C]]|A|$]]|$1|H|3|I|5|E|7|2D|8|@]|9|@$F|2E|G|2F|1|2G]]|A|$]]|$1|J|3|K|5|E|7|2H|8|@]|9|@$F|2I|G|2J|1|2K]]|A|$]]|$1|L|3|M|5|E|7|2L|8|@]|9|@$F|2M|G|2N|1|2O]]|A|$]]|$1|N|3|O|5|E|7|2P|8|@]|9|@$F|2Q|G|2R|1|2S]]|A|$]]|$1|P|3|-4|5|6|7|2T|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|2U|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|2V|8|@]|9|@]|A|$]]|$1|T|3|U|5|V|7|2W|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|2X|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|2Y|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|2Z|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|30|8|@]|9|@]|A|$]]|$1|12|3|-4|5|6|7|31|8|@]|9|@]|A|$]]|$1|13|3|14|5|V|7|32|8|@]|9|@]|A|$]]|$1|15|3|-4|5|6|7|33|8|@]|9|@]|A|$]]|$1|16|3|-4|5|6|7|34|8|@]|9|@]|A|$]]|$1|17|3|18|5|6|7|35|8|@]|9|@]|A|$]]|$1|19|3|1A|5|1B|7|36|8|@]|9|@]|A|$1C|1D]]|$1|1E|3|1F|5|6|7|37|8|@]|9|@$F|38|G|39|1|3A]]|A|$]]|$1|1G|3|-4|5|6|7|3B|8|@]|9|@]|A|$]]|$1|1H|3|1I|5|V|7|3C|8|@]|9|@]|A|$]]|$1|1J|3|-4|5|6|7|3D|8|@]|9|@]|A|$]]|$1|1K|3|-4|5|6|7|3E|8|@]|9|@]|A|$]]|$1|1L|3|1M|5|6|7|3F|8|@]|9|@]|A|$]]|$1|1N|3|1O|5|1B|7|3G|8|@]|9|@]|A|$1C|1D]]|$1|1P|3|-4|5|6|7|3H|8|@]|9|@]|A|$]]]|1Q|$1R|$5|1S|1T|1U|A|$1V|1W]]|1X|$5|1S|1T|1U|A|$1V|1Y]]|1Z|$5|1S|1T|1U|A|$1V|20]]|21|$5|1S|1T|1U|A|$1V|22]]|23|$5|1S|1T|1U|A|$1V|24]]|25|$5|1S|1T|1U|A|$1V|26]]]]

These are some of the best tutorials I've found:

<ul>
<li><a href="http://www.raywenderlich.com/934/core-data-tutorial-getting-started" rel="nofollow noreferrer">Best tutorial I've found</a></li>
<li><a href="http://iphoneinaction.manning.com/iphone_in_action/2009/08/core-data-part-1-an-introduction.html" rel="nofollow noreferrer">Another good, multipage tutorial</a></li>
<li><a href="http://cocoadevcentral.com/articles/000086.php" rel="nofollow noreferrer">Very good explaination of concepts</a></li>
<li><a href="http://developer.apple.com/macosx/coredata.html" rel="nofollow noreferrer">Apple Doc, might help with the concepts</a></li>
<li><a href="http://borkware.com/quickies/one?topic=Core%20Data" rel="nofollow noreferrer">Little Cheatsheet</a></li>
</ul>

As for your quesstions:

<blockquote>
 I get that there is a coordinator and
 a context. I also get that there is
 state management. How do they work
 together?
</blockquote>

The persistent store coordinator is what manages the place your data is actually being stored, be that a SQLlite DB or a XML file or whatever. The coordinator is the abstraction so you don't have to worry about what type of storage is in the backend.

The Managed Object Context is how you interact with the Persistent Store Coordinator. Think of it as your scratch pad. You create and modify Managed Objects from the Managed Object Context.

<blockquote>
 I don't understand how I can store, say, an image and a few strings as an object.
 Let's say I want to retrieve the image and the strings later. What do I do?
</blockquote>

If you look through some of the above tutorials, you'll see how to pull objects out of the managed object context. A NSString would simply be stored as a string attribute on a managed object, like so:

<pre><code>[managedObject setValue:@"TestString" forKey:@"SomeStringProperty"];
</code></pre>

I'm not quite sure about images as I've never stored an image in Core Data before. I know anything that can be serialized can be stored as a transformable attribute. <a href="http://www.iphonedevsdk.com/forum/iphone-sdk-development/42457-save-image-core-data.html" rel="nofollow noreferrer">Here's a post about storing UIImages in Core Data</a>

<blockquote>
 Where do I save my state? How?
</blockquote>

You simply call the 'save' method on your managed object context. Like so:

<pre><code>[context save:&amp;error]
</code></pre>

I am having trouble understanding how Core Data works conceptually and in terms of code.

I get that there is a coordinator and a context. I also get that there is state management. How do they work together?

I don't understand how I can store, say, an image and a few strings as an object.

Let's say I want to retrieve the image and the strings later. What do I do? 

Where do I save my state? How?

What does my code look like? I would really appreciate a bare-bones code sample here, because I'm really confused.

Getting started with Core Data

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我很难理解Core Data在概念上和代码方面是如何工作的。我知道有一个协调器和一个上下文。我还了解到有状态管理。它们是如何协同工作的？我不明白如何将图像和几个字符串存储为一个对象。假设我想稍后检索图像和字符串。我做什么好？我在哪里保存我的状态？多么?我的代码是什么样子的？我真的很感激这里有一个简单的代码示例，因为我真...

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