objective-c - UIAlertView 关闭后如何重新加载 View ？

Question

关闭 UIAlertView 后，我想重新加载 View (运行 viewWillDisappear 用于 View ，运行 viewWillAppear 用于 View )。

我怎么做？我尝试过委托(delegate)给 nil 和 self 。这是我的代码。

- (IBAction)doStuffWhenUIButtonIsClicked:(id)sender
{
    int intSelection = [sender tag];
    NSString* strAlertTitle;
    NSString* strAlertMessage;
    if (intSelection == self.intCorrectChoice) {
        strAlertTitle = @"Correct tag!";
    }
    else {
        strAlertTitle = @"Sorry, incorrect tag!";
    }
strAlertMessage = @"The correct answer was 8.";

    self.answerReaction = [[UIAlertView alloc]
                           initWithTitle: strAlertTitle
                                 message: strAlertMessage
                                delegate: nil
                       cancelButtonTitle:@"Next Question"
                       otherButtonTitles:nil];
    [self.answerReaction show];
}

如您所见，我想在用户回答其中一个问题后加载一个新问题。

Answer 1

首先，您需要使您所在的 View Controller 符合 UIAlertViewDelegate协议(protocol)。

然后，在显示警报之前，您需要添加以下行:

self.answerReaction.delegate = self;

然后，实现 didDismissWithButtonIndex 委托(delegate)方法:

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    [self viewWillDisappear:YES];
    // load your new question
    [self viewWillAppear:YES];
}

那应该照顾它!