blocks|key|1426452|text|与其在初始化UIActionSheet时添加按钮，不如尝试使用addButtonWithTitle方法添加它们，方法是使用遍历NSArray的for循环。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1426453|UIActionSheet+*alert+=+[[UIActionSheet+alloc]+initWithTitle:+titleString
++++++++++++++++++++++++++++++delegate:+self
++++++++++++++++++++++++++++++cancelButtonTitle:+cancelString
++++++++++++++++++++++++++++++destructiveButtonTitle:+nil
++++++++++++++++++++++++++++++otherButtonTitles:+nil];

for(+NSString+*title+in+titles)++
++++[alert+addButtonWithTitle:title];+|code-block|syntax|javascript|1426454|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|$]]

Instead of adding the buttons when you initialize the UIActionSheet, try adding them with the addButtonWithTitle method using a for loop that goes through your NSArray.

<pre><code>UIActionSheet *alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: cancelString
 destructiveButtonTitle: nil
 otherButtonTitles: nil];

for( NSString *title in titles) 
 [alert addButtonWithTitle:title]; 
</code></pre>

blocks|key|1426505|text|这已经有一年的历史了，但解决方案很简单……按照@Simon的建议执行操作，但不要指定cancel按钮标题，因此：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1426506|UIActionSheet+*alert+=+[[UIActionSheet+alloc]+initWithTitle:+titleString
++++++++++++++++++++++++++++++delegate:+self
++++++++++++++++++++++++++++++cancelButtonTitle:+nil
++++++++++++++++++++++++++++++destructiveButtonTitle:+nil
++++++++++++++++++++++++++++++otherButtonTitles:+nil];|code-block|syntax|javascript|1426507|但在添加普通按钮后，添加取消按钮，如下所示：|1426508|for(+NSString+*title+in+titles)++{
++++[alert+addButtonWithTitle:title];+
}

[alert+addButtonWithTitle:cancelString];|1426509|现在，关键步骤是指定哪个按钮是cancel按钮，如下所示：|1426510|alert.cancelButtonIndex+=+[titles+count];|1426511|我们执行[titles+count]而不是[titles+count]+-+1，因为我们从titles的按钮列表中添加了cancel按钮作为额外按钮。|offset|length|style|CODE|1426512|现在，您还可以通过指定destructiveButtonIndex+(通常是[titles+count]+-+1按钮)来指定您希望哪个按钮成为破坏性按钮(即红色按钮)。此外，如果您将cancel按钮保留为最后一个按钮，iOS将在其他按钮和cancel按钮之间添加适当的间距。|1426513|所有这些都与iOS+2.0兼容，所以请尽情享受吧。|1426514|entityMap^0|0|0|0|0|0|0|4|E|L|I|19|6|0|12|I|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|16|8|@$Q|17|R|18|S|T]|$Q|19|R|1A|S|T]|$Q|1B|R|1C|S|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1D|8|@$Q|1E|R|1F|S|T]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1G|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|Z|$]]

This is a year old but the solution is pretty simple ... do as @Simon suggested but do not specify a cancel button title, so:

<pre><code>UIActionSheet *alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: nil
 destructiveButtonTitle: nil
 otherButtonTitles: nil];
</code></pre>

But after adding your normal buttons, add the cancel button, like:

<pre><code>for( NSString *title in titles) {
 [alert addButtonWithTitle:title]; 
}

[alert addButtonWithTitle:cancelString];
</code></pre>

Now the key step is to specify which button is the cancel button, like:

<pre><code>alert.cancelButtonIndex = [titles count];
</code></pre>

We do <code>[titles count]</code> and not <code>[titles count] - 1</code> because we are adding the cancel button as extra from the list of buttons in <code>titles</code>.

You now also specify which button you want to be the destructive button (ie the red button) by specifying the destructiveButtonIndex (typically that will be the <code>[titles count] - 1</code> button). Also, if you keep the cancel button to be the last button, iOS will add that nice spacing between the other buttons and the cancel button.

All of these is iOS 2.0 compatible so enjoy.

blocks|key|1211621|text|-+(void)showActionSheetWithButtons:(NSArray+*)buttons+withTitle:(NSString+*)title+{

++++UIActionSheet+*actionSheet+=+[[UIActionSheet+alloc]+initWithTitle:+title+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++delegate:+self
++++++++++++++++++++++++++++++++++++++++++++++++++++cancelButtonTitle:+nil+
+++++++++++++++++++++++++++++++++++++++++++++++destructiveButtonTitle:+nil+
++++++++++++++++++++++++++++++++++++++++++++++++++++otherButtonTitles:+nil];

++++for+(NSString+*title+in+buttons)+{
++++++++[actionSheet+addButtonWithTitle:+title];
++++}

++++[actionSheet+addButtonWithTitle:+@"Cancel"];
++++[actionSheet+setCancelButtonIndex:+[buttons+count]];
++++[actionSheet+showInView:self.view];
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1211622|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>- (void)showActionSheetWithButtons:(NSArray *)buttons withTitle:(NSString *)title {

 UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle: title 
 delegate: self
 cancelButtonTitle: nil 
 destructiveButtonTitle: nil 
 otherButtonTitles: nil];

 for (NSString *title in buttons) {
 [actionSheet addButtonWithTitle: title];
 }

 [actionSheet addButtonWithTitle: @"Cancel"];
 [actionSheet setCancelButtonIndex: [buttons count]];
 [actionSheet showInView:self.view];
}
</code></pre>

blocks|key|1426570|text|addButtonWithTitle:返回添加的按钮的索引。在init方法中将cancelButtonTitle设置为nil，并在添加其他按钮后运行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1426571|actionSheet.cancelButtonIndex+=+[actionSheet+addButtonWithTitle:@"Cancel"];|code-block|syntax|javascript|1426572|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|$]]

addButtonWithTitle: returns the index of the added button. Set cancelButtonTitle to nil in the init method and after adding additional buttons run this:

<pre><code>actionSheet.cancelButtonIndex = [actionSheet addButtonWithTitle:@"Cancel"];
</code></pre>

blocks|key|1426613|text|您可以添加cancel按钮，并将其设置为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1426614|[actionSheet+setCancelButtonIndex:+[actionSheet+addButtonWithTitle:+@"Cancel"]];|code-block|syntax|javascript|1426615|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|$]]

You can add the cancel button and set it like this:

<pre><code>[actionSheet setCancelButtonIndex: [actionSheet addButtonWithTitle: @"Cancel"]];
</code></pre>

UIAlertSheet's constructor takes an otherButtonTitles parameter as a varg list. I'd like to specify the other button titles from an NSArray instead. Is this possible?

i.e. I have to do this:

<pre><code>id alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: cancelString
 destructiveButtonTitle: nil
 otherButtonTitles: button1Title, button2Title, nil];
</code></pre>

But since I'm generating the list of available buttons at runtime, I really want something like this:

<pre><code>id alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: cancelString
 destructiveButtonTitle: nil
 otherButtonTitles: otherButtonTitles];
</code></pre>

Right now, I'm thinking that I need to have a seperate call to <code>initWithTitle:</code> for 1 item, 2 items and 3 items. Like this:

<pre><code>if ( [titles count] == 1 ) {
 alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: cancelString
 destructiveButtonTitle: nil
 otherButtonTitles: [titles objectAtIndex: 0], nil];
} else if ( [titles count] == 2) {
 alert = [[UIActionSheet alloc] initWithTitle: titleString
 delegate: self
 cancelButtonTitle: cancelString
 destructiveButtonTitle: nil
 otherButtonTitles: [titles objectAtIndex: 0], [titles objectAtIndex: 1], nil];
} else {
 // and so on
}
</code></pre>

That's a lot of duplicate code, but it might actually be reasonable since I have at most three buttons. How can I avoid this?

Use NSArray to specify otherButtonTitles?

UIAlertSheet的构造函数接受一个otherButtonTitles参数作为varg列表。我想从NSArray中指定其他按钮的标题。这个是可能的吗？例如，我必须这样做：id alert = [[UIActionSheet alloc] initWithTitle: titleString            ...

问使用NSArray指定otherButtonTitles？
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