操作表取消按钮不取消操作表

Question

我将一个数组（来自数据库）传递给操作表。我已经添加了取消按钮，但它没有取消。它显示超出边界的错误数组。这是我的代码：

UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"Chatting Apps" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles: nil];

    for (int i =0;i<self.arrOfAppNames.count;i++) {

        [actionSheet addButtonWithTitle:[[self.arrOfAppNames objectAtIndex:i]objectAtIndex:1]];

    }
    [actionSheet addButtonWithTitle:@"Cancel"];
    actionSheet.cancelButtonIndex = [self.arrOfAppNames count];
    [actionSheet showInView:self.view];

Answer 1

使用此代码希望这可以帮助您：

UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"Chatting Apps" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles: nil];

for (int i =0;i<self.arrOfAppNames.count;i++) {

    [actionSheet addButtonWithTitle:[[self.arrOfAppNames objectAtIndex:i]objectAtIndex:1]];

}
[actionSheet addButtonWithTitle:@"Cancel"];
actionSheet.cancelButtonIndex = (int)[self.arrOfAppNames count];
[actionSheet showInView:self.view];

Answer 2

当我向操作表添加取消按钮时，这对我有用：

[actionSheet addButtonWithTitle:@"Cancel"];
actionSheet.cancelButtonIndex = actionSheet.numberOfButtons - 1;