UIActionSheet addButtonWithTitle：不按正确的顺序添加按钮 [英] UIActionSheet addButtonWithTitle: doesn't add buttons in the right order

问题描述

我已经继承了 UIActionSheet ，在 -init 方法中，我必须单独添加按钮调用超级 init （不能传递var_args）。

现在看起来像这样： / p>

  if（self = [super initWithTitle：title delegate：self cancelButtonTitle：cancel destructiveButtonTile：destroy otherButtonTitles：firstButton，nil]）{
 if（firstButton）{
 id buttonTitle; 
 va_list argList; 
 va_start（argList，firstButtton）; 
 while（buttonTitle = va_arg（argList，id））{
 [self addButtonWithTitle：buttonTitle] 
} 
 va_end（argList）; 
} 
} 
 return self;但是，在这种情况下，我的具体使用没有破坏性按钮，取消按钮和四个其他按钮。当它显示时，排序全部关闭，显示为
 
 
 
 Button1 
 
取消
 
 Button2 
 
 Button3 
 
 
 
像他们只是添加到列表的结尾，这是有道理的;然而，我不希望它看起来像这样;所以我该怎么办？实际上，是否有任何方式正确子类化 UIActionSheet 并使其工作？
解决方案
 
您可以按正确的顺序添加它们，然后手动设置 cancelButtonIndex 和 destructiveButtonIndex 。 
 
 
 
对于您的代码示例：
  if initWithTitle：title delegate：self cancelButtonTitle：nil destructiveButtonTile：nil otherButtonTitles：nil]）{
 if（firstButton）{
 id buttonTitle; 
 int idx = 0; 
 va_list argList; 
 va_start（argList，firstButtton）; 
 while（buttonTitle = va_arg（argList，id））{
 [self addButtonWithTitle：buttonTitle] 
 idx ++; 
} 
 va_end（argList）; 
 [self addButtonWithTitle：cancel]; 
 [self addButtonWithTitle：destroy]; 
 self.cancelButtonIndex = idx ++; 
 self.destructiveButtonIndex = idx ++; 
} 
} 
 return self; 
  
 
I've subclassed UIActionSheet, and in the -init method, I have to add the buttons individually after calling the super init (can't pass a var_args).

Right now, it looks like this:
if (self = [super initWithTitle:title delegate:self cancelButtonTitle:cancel destructiveButtonTile:destroy otherButtonTitles:firstButton,nil]) {
  if (firstButton) {
    id buttonTitle;
    va_list argList;
    va_start(argList, firstButtton);
    while (buttonTitle = va_arg(argList, id)) {
      [self addButtonWithTitle:buttonTitle]
    }
    va_end(argList);
  }
}
return self;
However, my specific use in this case has no destructive button, a cancel button, and four other buttons.  When it shows up, the ordering is all off, showing up as

Button1

Cancel

Button2

Button3

Like they were simply added to the end of the list, which makes sense; however, I don't WANT it to look like this; so what do I do?  Is there, in fact, any way to subclass UIActionSheet correctly and make this work?
解决方案
You can just add them in your correct order, and then set the cancelButtonIndex and destructiveButtonIndex manually.

For your code example:
if (self = [super initWithTitle:title delegate:self cancelButtonTitle:nil destructiveButtonTile:nil otherButtonTitles:nil]) {
  if (firstButton) {
    id buttonTitle;
    int idx = 0;
    va_list argList;
    va_start(argList, firstButtton);
    while (buttonTitle = va_arg(argList, id)) {
      [self addButtonWithTitle:buttonTitle]
      idx++;
    }
    va_end(argList);
    [self addButtonWithTitle:cancel];
    [self addButtonWithTitle:destroy];
    self.cancelButtonIndex = idx++;
    self.destructiveButtonIndex = idx++;
  }
}
return self;


                        
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