当可可方法想要一个选择器作为参数，我如何在ruby中表达？ | 可可

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当可可方法想要一个选择器作为参数，我如何在ruby中表达？

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问题描述

在教程中对于可可的表编程，我被告知调用以下方法：

  [[alert beginSheetModalForWindow：[searchField window] 
 modalDelegate：self 
 didEndSelector：@selector（alertDidEnd：returnCode：contextInfo :) 
 contextInfo：nil];

我在ruby中写了如下：

  alert.beginSheetModalForWindow（self.window，
 modalDelegate：self，
 didEndSelector：：alertDidEnd，
 contextInfo：nil）

当然， didEndSelector 部分是错误的。后来在我的代码中，我有一个方法alertDidEnd，它接受returnCode和contextInfo作为参数。当我看着 self.methods 我注意到该方法被列为 alertDidEnd：returnCode：contextInfo：。在上面的示例代码中，'@'用于标记选择器。这是在Macruby中用符号完成的，但在这种情况下，符号将包含冒号，这是不允许的。我应该如何将此方法名称表示为符号？

谢谢！

div class =h2_lin>解决方案

如，符号与选择器桥接。所以你可以：

  alert.beginSheetModalForWindow（self.window，
 modalDelegate：self，
 didEndSelector：：'alertDidEnd：returnCode：contextInfo：'，
 contextInfo：nil）

In this tutorial for sheet programming in cocoa, I am told to invoke the following method:

[[alert beginSheetModalForWindow:[searchField window]
    modalDelegate:self
    didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)
    contextInfo:nil];

I have written this as follows in ruby,

alert.beginSheetModalForWindow(self.window,
    modalDelegate:self,
    didEndSelector: :alertDidEnd,
    contextInfo:nil)

Of course, the didEndSelector part is wrong. Later in my code I have a method alertDidEnd, which takes returnCode and contextInfo as arguments. When I looked at self.methods I noticed that the method is listed as alertDidEnd:returnCode:contextInfo:. In the sample code above an '@' is used to mark the selector. This is accomplished in Macruby with a symbol, but in this case the symbol would contain colons, which is not allowed. How should I represent this method name as a symbol? I wasn't able to find this information on my own, where should I have looked that I didn't?

Thanks!

解决方案

As noted in the MacRuby docs, symbols are bridged with selectors. So you'd do:

alert.beginSheetModalForWindow(self.window,
    modalDelegate:self,
    didEndSelector: :'alertDidEnd:returnCode:contextInfo:',
    contextInfo:nil)

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09-02 05:36