Xcode 如何向警报视图按钮添加操作？

我正在尝试设置一个警报视图，这样当按下“Ok”按钮时，一个动作表会显示两个选项。我相信我有正确的格式，没有错误，但当我运行它时，什么也没有发生。请提前帮助并感谢您

-(IBAction)sendSG:(id)sender{
    UIAlertView *message = [[UIAlertView alloc]
                            initWithTitle:@"Send Study Guides!"
                            message:@"Please send your study guides to help create a bigger and more efficent network of study guides. You can send them by email, or you can take a picture of your study guide and send it to us."
                            delegate:self //Changed Here
                            cancelButtonTitle:@"Cancel"
                            otherButtonTitles:@"Ok", nil];

    [message show];

}





-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

    if (buttonIndex == 0) {
        UIActionSheet *sendOptions = [[UIActionSheet alloc]

                                      initWithTitle:@"Add study guide"
                                      delegate:self
                                      cancelButtonTitle:@"Cancel"
                                      destructiveButtonTitle:@"Destructive Button"
                                      otherButtonTitles:@"Email", @"Take a picture", nil];

        [sendOptions showInView:self.view];
        }   

    }



    -(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
        if (buttonIndex == 0) {
        NSString *emailTitle = @"Study Guides";

        NSArray *toRecipents = [NSArray arrayWithObject:@"blank@gmail.com"];

        MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];

        [mc setSubject:emailTitle];

        [mc setToRecipients:toRecipents];

        [self presentViewController:mc animated:YES completion:NULL];

        }
    }

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你的按钮索引搞错了。

---

按钮

buttonIndex==0

是取消按钮，

buttonIndex==1

是确定按钮。

在警报视图的回调中尝试以下操作：

double delayInSeconds = 1.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
    // show action sheet here.

});

如果它对您有效，请根据需要修改delayUnseconds

将警报视图的委托设置为self。 在代码中

-（无效）alertView:（UIAlertView*）alertView单击按钮索引：（NSInteger）按钮索引 因此未被调用

是的，还更改了按钮索引…忘了告诉你了。alertView和actionSheet都应为1

使您的viewController操作表成为委托。在viewController.h中添加“UIActionSheetDelegate”

@接口XYZViewController:UIViewController UIActionSheetDelegate（用角括号括起来）

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其他一切都会好的。。如果有任何问题，请告诉我

是的，很抱歉回复太晚，但这很有效！非常感谢你的帮助！