iOS中如何实现弹出对话框?

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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