Dynamic UIActionSheet'otherButtonTitles：'

Question

我正在嘗試創建一些內容，以列出與UIActionSheet中的設備連接的所有用戶的Twitter帳戶。例如，我的設備上有三個Twitter帳戶。我希望操作說明書使用取消按鈕列出我的帳戶。目前，我的功能如下所示：

- (void)showAlertViewForAccounts:(NSArray*)accounts { 
    accounts = _.arrayMap(accounts, ^id(ACAccount *account) { 
     return account.username; 
    }); 

    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose an account:" 
                  delegate:self 
                cancelButtonTitle:@"Cancel" 
               destructiveButtonTitle:nil 
                otherButtonTitles:nil]; 
    for (NSString *username in accounts) { 
     [actionSheet addButtonWithTitle:username]; 
    }  


    [actionSheet showInView:[[[[[UIApplication sharedApplication] delegate] window] rootViewController] view]]; 
} 

我的問題是，取消按鈕不顯示在操作表單獨的「部分」中。

反正是有，我可以A.）的accounts數組轉換成va_list作爲UIActionSheetinit...方法的參數被傳入，或B.）指定取消按鈕應在一個單獨的「部分被顯示「？

Answer 1

添加取消按鈕別人之後：

- (void)showAlertViewForAccounts:(NSArray*)accounts { 
    accounts = _.arrayMap(accounts, ^id(ACAccount *account) { 
     return account.username; 
    }); 

    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose an account:" 
                  delegate:self 
                cancelButtonTitle:nil 
               destructiveButtonTitle:nil 
                otherButtonTitles:nil]; 
    for (NSString *username in accounts) { 
     [actionSheet addButtonWithTitle:username]; 
    }  

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

    [actionSheet showInView:[[[[[UIApplication sharedApplication] delegate] window] rootViewController] view]]; 
}