blocks|key|1140123|text|从Clang+v3.1开始，你现在可以使用Objective-C文本了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1140124|NSNumber+*fortyTwo+=+@42;+++++++++++++//+equivalent+to+[NSNumber+numberWithInt:42]
NSNumber+*fortyTwoUnsigned+=+@42U;++++//+equivalent+to+[NSNumber+numberWithUnsignedInt:42U]
NSNumber+*fortyTwoLong+=+@42L;++++++++//+equivalent+to+[NSNumber+numberWithLong:42L]
NSNumber+*fortyTwoLongLong+=+@42LL;+++//+equivalent+to+[NSNumber+numberWithLongLong:42LL]|code-block|syntax|javascript|1140125|所以，在回答你的具体问题时：|1140126|[Tyler+setArms:[[[NSNumber+alloc]+initWithInt:1]+autorelease]];|1140127|现在可以写成：|1140128|[Tyler+setArms:@1];|1140129|也有用于数组和字典的文字，但它们超出了本问题的范围。|1140130|要利用Xcode中的文字，至少需要4.4版--这是Apple的LLVM4.0编译器附带的版本。|1140131|entityMap|0|LINK|mutability|MUTABLE|url|http://clang.llvm.org/docs/ObjectiveCLiterals.html^0|1|A|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|C|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|C|$]]|$1|S|3|T|5|6|7|1C|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

As of <a href="http://clang.llvm.org/docs/ObjectiveCLiterals.html">Clang v3.1</a> you can now use Objective-C literals.

<pre><code>NSNumber *fortyTwo = @42; // equivalent to [NSNumber numberWithInt:42]
NSNumber *fortyTwoUnsigned = @42U; // equivalent to [NSNumber numberWithUnsignedInt:42U]
NSNumber *fortyTwoLong = @42L; // equivalent to [NSNumber numberWithLong:42L]
NSNumber *fortyTwoLongLong = @42LL; // equivalent to [NSNumber numberWithLongLong:42LL]
</code></pre>

So, answering your specific question:

<pre><code>[Tyler setArms:[[[NSNumber alloc] initWithInt:1] autorelease]];
</code></pre>

Can now be written as:

<pre><code>[Tyler setArms:@1];
</code></pre>

There are also literals for arrays and dictionaries, but they are beyond the scope of this question.

To take advantage of literals in Xcode you'll need at least version 4.4 -- this comes with Apple's LLVM 4.0 compiler.

blocks|key|925710|text|Xcode4.4引入了用于NSNumber、NSArray和NSDictionary的文本的rjstelling+mentioned的Clang特性。语法很简单：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|925711|//Number+literal
NSNumber+*pi+=+@3.14;

//Array+literal
NSArray+*primes+=+@[+@2,+@3,+@5,+@7,+@11+];+//No+nil+terminator+needed

//Dictionary+literal
NSDictionary+*dict+=+@{
++++@"key1":+@42,
++++@"key2":+@"Another+key",
++++@3:+@"A+NSNumber+key"
};+//No+nil+terminator,+stored+in+"key:value,"+format|code-block|syntax|javascript|925712|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/11120405/418715^0|D|8|M|7|U|C|1A|K|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

Xcode 4.4 has introduced the Clang features that <a href="https://stackoverflow.com/a/11120405/418715">rjstelling mentioned</a> for literals for <code>NSNumber</code>, <code>NSArray</code> and <code>NSDictionary</code>. The syntax is simple:

<pre><code>//Number literal
NSNumber *pi = @3.14;

//Array literal
NSArray *primes = @[ @2, @3, @5, @7, @11 ]; //No nil terminator needed

//Dictionary literal
NSDictionary *dict = @{
 @"key1": @42,
 @"key2": @"Another key",
 @3: @"A NSNumber key"
}; //No nil terminator, stored in "key:value," format
</code></pre>

blocks|key|1140247|text|既然没有人提到这一点。如果需要将值包装在NSNumber中，NSNumber文本语法如下所示。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1140248|int+val+=+13;
NSNumber+*numVal+=+@(val);|code-block|syntax|javascript|1140249|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Since nobody has mentioned this... If you need to wrap a value in an NSNumber, the NSNumber literal syntax is as follows.

<pre><code>int val = 13;
NSNumber *numVal = @(val);
</code></pre>

I love the shorthand handling of string literals in Objective C with the <code>@"string"</code> notation. Is there any way to get similar behavior with <code>NSNumber</code>s? I deal with numbers more and it's so tedious having <code>[NSNumber numberWithWhatever:]</code> calls everywhere. Even creating a macro would work, but my knowledge of how best to do that is limited.

@"" string type literals for NSNumber

Objective-C

编译器

Xcode

我喜欢在Objective C中用@"string"表示法快速处理字符串文字。有没有办法获得与NSNumbers类似的行为？我更多地处理数字，到处都是[NSNumber numberWithWhatever:]调用，这太乏味了。即使创建一个宏也可以，但我对如何最好地做到这一点的知识是有限的。

问NSNumber的@"“字符串类型文字
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