ios 提示框 选择对话框 等待框 iphone,ipad

等待框：

UIAlertView *showWaitingAlert(){      UIAlertView *waittingAlert = [[UIAlertView alloc] initWithTitle: @"正在获取数据"                                                 message: @"请稍候..."                                                delegate: nil                                       cancelButtonTitle: nil                                       otherButtonTitles: nil];                  UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];      activityView.frame = CGRectMake(139.0f-18.0f, 80.0f, 37.0f, 37.0f);      [waittingAlert addSubview:activityView];      [activityView startAnimating];            [waittingAlert show];            return waittingAlert;    }  void dismissWaitingAlert (UIAlertView* waittingAlert){        if (waittingAlert != nil) {          [waittingAlert dismissWithClickedButtonIndex:0 animated:YES];          [waittingAlert release];         waittingAlert =nil;      }  }

首先，显示一个无按钮的alertView，然后添加一个UIActivityIndicatorView作为alertView的子视图

最后，通过alertView的dismissWithClickedButtonIndex:animated:取消显示alertView。

代码和显示效果都非常优雅

调用方法：

-(IBAction)ButtonOnPress:(id)sender{

G_waitalert = showWaitingAlert();

//定时5秒自动关闭

[self performSelector:@selector(timerCallback) withObject:nil afterDelay:5];

}

其中callback函数为实例函数，不然selector没法用类函数（我不会，呵呵）：

-(void)timerCallback{

dismissWaittingAlert(G_waitalert);

}

或者直接在callback里调用全局变量G_waitalert进行操作！