ios - UIActionSheet取消按钮无法正常工作

Question

UIActionSheet，它具有带有标题的按钮，我正在从数组中获取标题。我想获取按钮的标题并以UILabel显示，我这样做了，但是如果我按取消按钮，取消按钮也会显示，我不想显示UILabel中的取消按钮标题
下面我尝试过的代码，

 - (IBAction)site_Selection:(id)sender {

NSArray *array = @[@"one",@"two",@"three",@"Smart Gladiator1"];

UIActionSheet *actionSheet = [[UIActionSheet alloc]
                              initWithTitle:nil
                              delegate:self
                              cancelButtonTitle:nil
                              destructiveButtonTitle:nil
                              otherButtonTitles:nil];
actionSheet.delegate = self;
for (NSString *title in array) {
    [actionSheet addButtonWithTitle:title];
}

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


[actionSheet showInView:self.view];


   }

     -(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

NSString *title = [actionSheet buttonTitleAtIndex:buttonIndex];


self.btn_site_selection.titleLabel.text =  [actionSheet buttonTitleAtIndex:buttonIndex];

 }

请帮助我做到这一点，

Answer 1

您不应该处理取消按钮的按下。

由于所有按UIActionSheet的按钮都由actionSheet:clickedButtonAtIndex:处理，因此您需要检查按钮索引是否为取消按钮的索引。您可以使用cancelButtonIndex上的UIActionSheet来做到这一点:

- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    if  (actionSheet.cancelButtonIndex == buttonIndex) {
        return;
    }

}