blocks|key|2235364|text|您可以像这样设置全局数组：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2235365|import+UIKit

var+abc+:+String+=+String()|code-block|syntax|javascript|2235366|您可以在任何其他文件中访问它，如：|2235367|abc+=+"ABC"|2235368|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can set global Array like this way :

<pre><code>import UIKit

var abc : String = String()
</code></pre>

and you can access it in any other file like :

<pre><code>abc = "ABC"
</code></pre>

blocks|key|957594|text|我就是这样做的..。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|957595|class+MessageViewCell+{
++++struct+MessageViewCellHeightCache+{
++++++++static+var+cache:+[String:CGFloat]+=+Dictionary<String,+CGFloat>()
++++}
}|code-block|syntax|javascript|957596|我访问它的方式如下：|957597|MessageViewCell.MessageViewCellHeightCache.cache["first"]+=+12.0|957598|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This is how I did it...

<pre><code>class MessageViewCell {
 struct MessageViewCellHeightCache {
 static var cache: [String:CGFloat] = Dictionary&lt;String, CGFloat&gt;()
 }
}
</code></pre>

And I accessed it as follows:

<pre><code>MessageViewCell.MessageViewCellHeightCache.cache["first"] = 12.0
</code></pre>

blocks|key|999818|text|从Swift编程语言+-|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|999819|全局变量是在任何函数、方法、闭包或类型上下文之外定义的变量。|blockquote|999820|因此，您可以直接在import语句之后在任何文件的顶部声明变量。|style|CODE|999821|不过，我建议你认真考虑一下。一般来说，全球化并不是个好主意。您最好使用单例上的属性或使用依赖项注入。|999822|你的第二个问题“我将在哪里实例化数组？”是全球化不好的原因之一--它们的生命周期没有从其他对象的角度很好地定义。第一次使用时初始化的单例消除了这个问题。|999823|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/ios/documentation/swift/conceptual/swift_programming_language/Properties.html^0|1|9|0|0|0|9|6|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$]]|$1|G|3|H|5|6|7|11|8|@$A|12|B|13|I|J]]|9|@]|C|$]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|C|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

From the <a href="https://developer.apple.com/library/ios/documentation/swift/conceptual/swift_programming_language/Properties.html" rel="noreferrer">Swift Programming Language</a> -
<blockquote>
Global variables are variables that are defined outside of any
function, method, closure, or type context
</blockquote>
So you can simply declare your variable at the top of any file straight after the <code>import</code> statements.
However, I would suggest you seriously reconsider. Generally globals aren't a good idea. You are better off with properties on a singleton or using dependency injection.
Your second question &quot;where would I instantiate the array?&quot; is part of the reason why globals are bad - their lifecycle isn't well defined in terms of your other objects. A singleton that is initialised on first use eliminates this issue.

blocks|key|954297|text|尝试使用以下内容创建一个新的Swift文件：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|954298|struct+Constants+{

++static+let+appName:+String+=+"My+App"

++struct+Colors+{

++++static+let+colorTextStandard+=+UIColor(red:+0/255,+green:+0/255,+blue:+0/255,+alpha:+0.3)+//#000000

++}

++struct+Data+{

++++static+var+myStrings+=+[String]()++//+Yea,+this+is+not+a+constant,+but+that's+alright...

++}

}|code-block|syntax|javascript|954299|然后，您可以使用以下方法引用这些全局常量(或者可以使它们成为变量)：|954300|Constants.appName|954301|或|954302|Constants.Colors.colorTextStandard|954303|954304|Constants.Data.myStrings+=+[stringOne,+stringTwo]|954305|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|X|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|O|3|L|5|6|7|Z|8|@]|9|@]|A|$]]|$1|P|3|Q|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|R|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|S|$]]

Try making a new Swift file with this:

<pre><code>struct Constants {

 static let appName: String = "My App"

 struct Colors {

 static let colorTextStandard = UIColor(red: 0/255, green: 0/255, blue: 0/255, alpha: 0.3) //#000000

 }

 struct Data {

 static var myStrings = [String]() // Yea, this is not a constant, but that's alright...

 }

}
</code></pre>

You can then refer to those global constants (or you can make them variables) using:

<pre><code>Constants.appName
</code></pre>

or

<pre><code>Constants.Colors.colorTextStandard
</code></pre>

or

<pre><code>Constants.Data.myStrings = [stringOne, stringTwo]
</code></pre>

I want to make a global array of custom objects that can be accessed throughout the app (AppDelegate, ViewController classes, TableViewController classes, etc). I have researched for a way to do it, but have not found an answer. I have tried making giving the array a public scope, but I get a complier warning which says <code>Declaring public variable from internal class</code> and when I try to access it in a different file, I get an error that says <code>Use of unresolved identifier 'arrayObjectives'</code>

How would I go about making that array globally accessible to all files in the application and where would I instantiate that array?

Declaring Global Variables in Swift

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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我想创建一个全局的定制对象数组，这些对象可以在整个应用程序(AppDelegate、ViewController类、TableViewController类等)中访问。我研究过一种方法，但没有找到答案。我尝试将数组设置为一个公共作用域，但是我收到了一个编译器警告，上面写着Declaring public variabl...

问在Swift中声明全局变量
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