取消按鈕和UIActionSheet的問題

Question

如何確定取消按鈕是否在UIActionSheet上按下？

我UIActionSheet設置是這樣的：

-(IBAction)fileButtonPressed 
{ 
    UIActionSheet *mymenu = [[UIActionSheet alloc] 
          initWithTitle:@"Select Folder" 
          delegate:self 
          cancelButtonTitle:@"Cancel" 
          destructiveButtonTitle:nil 
          otherButtonTitles:nil]; 

    for (i=0; i<3; i++) 
    { 
     [mymenu addButtonWithTitle:@"Button Name"]; 
    } 

    [mymenu showInView:self.view]; 

} 

我已經是我無法取消按鈕和選擇的第一個按鈕區分的問題。

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex 
{ 
    NSString *option = [actionSheet buttonTitleAtIndex:buttonIndex]; 

    //buttonIndex == 0 if the cancel button is pressed or 
    //if the first item is pressed. 
} 

有沒有更好的設置方法？

Answer 1

訣竅結果是不使用自動取消按鈕，而是自己添加它。

另一個小問題是在最後添加取消按鈕而不是開始。

-(IBAction)fileButtonPressed 
{ 
    UIActionSheet *mymenu = [[UIActionSheet alloc] 
          initWithTitle:@"Select Folder" 
          delegate:self 
          cancelButtonTitle:nil 
          destructiveButtonTitle:nil 
          otherButtonTitles:nil]; 
    for (int nb=0; nb<3; nb++) 
    { 
     [mymenu addButtonWithTitle:@"Button Name"]; 
    } 

    mymenu.cancelButtonIndex = [mymenu addButtonWithTitle: @"Cancel"]; 

    [mymenu showInView:self.view]; 
} 

信貸這個stackoverflow條目答案。

Answer 2

if (buttonIndex == actionSheet.cancelButtonIndex) 
{ 
    // Handle cancel action 
} 

UIActionSheet也有像destructiveButtonIndex和firstOtherButtonIndex特性來比較。

Answer 3

添加此

[MyMenu菜單showInView：self.parentViewController.tabBarController.view];