Question

我正在写一个益智游戏。当用户按下检查按钮时，我看他们输入的解决方案是否正确。根据结果，我为他们提供了两个行动表之一。现在我只有一些NSLog语句来确保调用的东西，但只有一个工作表似乎正常工作。

单击showErrorsActionSheet 中的按钮时，不会调用任何内容。操作表从屏幕上消失，但日志永远不会打印。

我怀疑它与将两个动作表声明给同一个委托（自我）有关

- (void) checkSolution {

    //code determines the value of the BOOL allCorrect 

    if (allCorrect) { //IF ALL OF THE LETTERS WERE CORRECT
        //display UIAlertView;
        NSLog(@"allCorrect");
        UIActionSheet *levelCompleteActionSheet = [[UIActionSheet alloc] initWithTitle:@"Congratulations! You Have Finished the Level!" delegate:self cancelButtonTitle:@"Review my work" destructiveButtonTitle:@"Choose next puzzle" otherButtonTitles:nil, nil];
        [levelCompleteActionSheet showInView:self.view];
        [levelCompleteActionSheet release];
    }
    else {
        //[self showIncorrectLettersInRed];

        UIActionSheet *showErrorsActionSheet = [[UIActionSheet alloc] initWithTitle:@"Sorry, thats not right. Show errors in red?" delegate:self cancelButtonTitle:@"No Thanks, I'll keep trying" destructiveButtonTitle:@"Yes please, I'm stuck!" otherButtonTitles:nil, nil];
        [showErrorsActionSheet showInView:self.view];
        [showErrorsActionSheet release];
    }
}

应该调用的方法是：

- (void) levelCompleteActionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
    if (buttonIndex != [actionSheet cancelButtonIndex]) {
        NSLog(@"return to levelSelect");
        //pushViewController:levelSelect
    }
    else {
        NSLog(@"continue to examine solution");
    }
}


- (void) showErrorsActionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
    if (buttonIndex != [actionSheet cancelButtonIndex]) {
        NSLog(@"show errors in red");
    }
    else {
        NSLog(@"continue to try");
    }
}

并且Ive在接口文件中声明了UIActionSheet协议，如下所示：

@interface GamePlay : UIViewController <UIActionSheetDelegate> {

Answer 1

为每个actionSheet设置一个标记，然后在UIActionSheet委托中使用switch语句。

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- (void)checkSolution
{
    if (allCorrect) 
    {
        UIActionSheet *levelCompleteActionSheet = [[UIActionSheet alloc] initWithTitle:@"Congratulations! You Have Finished the Level!" delegate:self cancelButtonTitle:@"Review my work" destructiveButtonTitle:@"Choose next puzzle" otherButtonTitles:nil, nil];

        [levelCompleteActionSheet setTag: 0];

        [levelCompleteActionSheet showInView:self.view];
        [levelCompleteActionSheet release];
    }
    else
    {    
        UIActionSheet *showErrorsActionSheet = [[UIActionSheet alloc] initWithTitle:@"Sorry, thats not right. Show errors in red?" delegate:self cancelButtonTitle:@"No Thanks, I'll keep trying" destructiveButtonTitle:@"Yes please, I'm stuck!" otherButtonTitles:nil, nil];

        [showErrorsActionSheet setTag: 1];

        [showErrorsActionSheet showInView:self.view];
        [showErrorsActionSheet release];
    }
}

UIActionSheet委托

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex 
{
    switch ( actionSheet.tag )
    {
        case 0: /* levelCompleteActionSheet */
        {
            switch ( buttonIndex )
            {
                case 0: /* 1st button*/
                    break;
                case 1: /* 2nd button */
                    break;
            }
        }
            break;
        case 1: /* showErrorsActionSheet */
            break;
    }
}

同样适用于此课程的其他任何地方，包括levelCompleteActionSheet:和showErrorsActionSheet:。唯一的区别是，您需要为每个actionSheet创建一个iVar，而不是在checkSolution中创建它们。

Answer 2

UIActionSheet在其委托上调用的方法是UIActionSheetDelegate协议中列出的方法。

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIModalViewDelegate_Protocol/UIActionSheetDelegate/UIActionSheetDelegate.html

要调用，您的方法必须是这些方法之一。我没有看到该协议中列出的levelCompleteActionSheet或showErrorsActionSheet！ :)你的方法必须命名为actionSheet:clickedButtonAtIndex:，而不是用整块布料命名的。

Answer 3

使用Tag解决此问题

levelCompleteActionSheet.tag = 100;

showErrorsActionSheet.tag = 101;

- (void) levelCompleteActionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {

  if(actionSheet.tag == 100){

     // levelCompleteActionSheet implement your required function

     }
  else if(actionSheet.tag == 101){

     // showErrorsActionSheet implement your required function

   } 
}

同一代表上有多个UIActionSheets

3 个答案:

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UIActionSheet委托