如何在iOS中实现弹出对话框 [英] how to implement a pop up dialog box in iOS

问题描述

计算完毕后，我想显示一个向用户传达信息的弹出框或警告框。有谁知道我在哪里可以找到更多相关信息？

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

Yup， UIAlertView 可能就是你要找的东西。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];

如果你想做一些更奇特的事情，比如在 UIAlertView ，您可以继承 UIAlertView 并在 init 方法中放入自定义UI组件。如果您想在显示 UIAlertView 后按下按钮，可以在上面设置委托并实施 - （void）alertView：（UIAlertView *）alertView clickedButtonAtIndex：（NSInteger）buttonIndex method。

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.

您可能还想要查看 UIActionSheet 。

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