Question

我正在尝试使用UIAlertView来获取准备好的标题，然后将其从屏幕上拉下来让玩家知道游戏正在启动。我如何使用UIAlertView做到这一点？

Answer 1

试试这个方法...

UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"Get Ready!" message:nil     delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];;

[alertView show];

[self performSelector:@selector(dismissReadyAlert:) withObject:alertView afterDelay:3.0];

-(void)dismissReadyAlert:(UIAlertView *)alertView
{
   [alertView dismissWithClickedButtonIndex:0 animated:NO];

   alertView.title = @"Your game is started!";

   [alertView show];

   [self performSelector:@selector(dismissStartAlert:) withObject:alertView afterDelay:2.0];
}

-(void)dismissStartAlert:(UIAlertView *)alertView
{
    [alertView dismissWithClickedButtonIndex:0 animated:YES];
}

谢谢！

Answer 2

您需要保留对警报的引用。然后只需调用此方法：

[alert dismissWithClickedButtonIndex:0 animated:YES];

Answer 3

在标题文件中声明 UIAlertView 对象。

UIAlertView *alertReady;

然后，只要您想显示并调用一种方法来关闭alertview

，就会显示alertview

    alertReady = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Get Ready" delegate:nil cancelButtonTitle:nil otherButtonTitles: nil];
    [alertReady show];

    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(hideAlertView) userInfo:nil repeats:NO];


-(void)hideAlertView
{
    [alertReady dismissWithClickedButtonIndex:0 animated:YES];
}

使用UIAlertView获取GetReady标题

3 个答案: