问题描述
计算后，我想显示一个弹出框或警告框，向用户传达消息.有谁知道我在哪里可以找到有关这方面的更多信息?
After a calculation, I want to display a pop up or alert box conveying a message to the user. Does anyone know where I can find more information about this?
推荐答案
是的，UIAlertView 可能就是您要找的.这是一个例子:
Yup, a UIAlertView is probably what you're looking for. Here's an example:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No network connection"
message:@"You must be connected to the internet to use this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
如果你想做一些更花哨的事情，比如在 UIAlertView 中显示自定义 UI，你可以继承 UIAlertView 并在 中放入自定义 UI 组件初始化 方法.如果要在 UIAlertView 出现后响应按钮按下，可以设置上面的 delegate 并实现 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex 方法.
If you want to do something more fancy, say display a custom UI in your UIAlertView, you can subclass UIAlertView and put in custom UI components in the init method. If you want to respond to a button press after a UIAlertView appears, you can set the delegate above and implement the - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex method.
您可能还想查看 UIActionSheet.
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