blocks|key|1288409|text|您可以将其封装在NSValue实例中，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1288410|SEL+mySelector+=+@selector(performSomething:);
NSValue+*value+=+[NSValue+value:&mySelector+withObjCType:@encode(SEL)];|code-block|syntax|javascript|1288411|然后为您的NSMutableArray实例增加价值。|1288412|entityMap^0|8|7|0|0|5|E|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

You can wrap it in an <code>NSValue</code> instance as follows:

<pre><code>SEL mySelector = @selector(performSomething:);
NSValue *value = [NSValue value:&amp;mySelector withObjCType:@encode(SEL)];
</code></pre>

and then add value to your <code>NSMutableArray</code> instance.

blocks|key|4909699|text|可以将选择器的NSString名称存储在数组中，并使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4909700|SEL+mySelector+=+NSSelectorFromString([selectorArray+objectAtIndex:0]);|code-block|syntax|javascript|4909701|从存储的字符串生成选择器。|4909702|此外，您还可以使用以下内容将选择器打包为NSInvocation|4909703|NSInvocation+*invocation+=+[NSInvocation+invocationWithMethodSignature:[self+methodSignatureForSelector:mySelector]];

[invocation+setTarget:self];
[invocation+setSelector:mySelector];
[invocation+setArgument:&arg+atIndex:2];
[invocation+retainArguments];|4909704|然后可以将这个NSInvocation对象存储在数组中，并在以后调用。|4909705|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You can store the NSString name of the selector in the array and use

<pre><code>SEL mySelector = NSSelectorFromString([selectorArray objectAtIndex:0]);
</code></pre>

to generate the selector from the stored string.

Additionally, you can package up the selector as an NSInvocation using something like

<pre><code>NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[self methodSignatureForSelector:mySelector]];

[invocation setTarget:self];
[invocation setSelector:mySelector];
[invocation setArgument:&amp;arg atIndex:2];
[invocation retainArguments];
</code></pre>

This NSInvocation object can then be stored in the array and invoked later.

blocks|key|846725|text|NSValue+valueWithPointer+/+pointerValue同样工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|846726|你只需要知道你不能序列化数组(也就是把它写到一个文件中)，如果你想这样做的话，使用NSStringFromSelector方法。|846727|这些都是将选择器放入NSValue对象的有效方法：|846728|++++id+selWrapper1+=+[NSValue+valueWithPointer:_cmd];
++++id+selWrapper2+=+[NSValue+valueWithPointer:@selector(viewDidLoad)];
++++id+selWrapper3+=+[NSValue+valueWithPointer:@selector(setObject:forKey:)];
++++NSString+*myProperty+=+@"frame";
++++NSString+*propertySetter+=+[NSString+stringWithFormat:@"set%25@%25@:",
++++++++++++++++++++++++++++++++[[myProperty+substringToIndex:1]uppercaseString],
++++++++++++++++++++++++++++++++[myProperty+substringFromIndex:1]];

++++id+selWrapper4+=+[NSValue+valueWithPointer:NSSelectorFromString(propertySetter)];

++++NSArray+*array+=+[NSArray+arrayWithObjects:
++++++++++++++++++++++selWrapper1,
++++++++++++++++++++++selWrapper2,
++++++++++++++++++++++selWrapper3,
++++++++++++++++++++++selWrapper4,+nil];

++++SEL+theCmd1+=+[[array+objectAtIndex:0]+pointerValue];
++++SEL+theCmd2+=+[[array+objectAtIndex:1]+pointerValue];
++++SEL+theCmd3+=+[[array+objectAtIndex:2]+pointerValue];
++++SEL+theCmd4+=+[[array+objectAtIndex:3]+pointerValue];|code-block|syntax|javascript|846729|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

NSValue valueWithPointer / pointerValue works equally well.

you just need to know that you can't serialise the array (ie write it to a file) if you want to do that, use the NSStringFromSelector approach.

these are all valid ways of putting a selector into an NSValue object:

<pre><code> id selWrapper1 = [NSValue valueWithPointer:_cmd];
 id selWrapper2 = [NSValue valueWithPointer:@selector(viewDidLoad)];
 id selWrapper3 = [NSValue valueWithPointer:@selector(setObject:forKey:)];
 NSString *myProperty = @"frame";
 NSString *propertySetter = [NSString stringWithFormat:@"set%@%@:",
 [[myProperty substringToIndex:1]uppercaseString],
 [myProperty substringFromIndex:1]];

 id selWrapper4 = [NSValue valueWithPointer:NSSelectorFromString(propertySetter)];

 NSArray *array = [NSArray arrayWithObjects:
 selWrapper1,
 selWrapper2,
 selWrapper3,
 selWrapper4, nil];

 SEL theCmd1 = [[array objectAtIndex:0] pointerValue];
 SEL theCmd2 = [[array objectAtIndex:1] pointerValue];
 SEL theCmd3 = [[array objectAtIndex:2] pointerValue];
 SEL theCmd4 = [[array objectAtIndex:3] pointerValue];
</code></pre>

I want to add selectors to an NSMutableArray. But since they're opaque types and no objects, that wouldn't work, right? Is there an wrapper object I can use? Or do I have to create my own?

Is there an wrapper object for SEL?

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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我想向NSMutableArray添加选择器。但是由于它们是不透明的类型，并且没有对象，所以这不会起作用，对吧？有没有我可以使用的包装器对象？或者我必须创建我自己的？

问有没有SEL的包装器对象？
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问有没有SEL的包装器对象？EN