iBooks如何做到这一点？ [英] How does iBooks do this?

问题描述

我目前正在uiwebview中显示文字。但是，我想允许用户选择文本并使用所选文本执行某些操作（google it）。 Apple已经使用iBooks完成了这类工作。单击单词时，您可以选择在字典中查找单词。如何使用Webview做同样的事情？

I am currently displaying text in a uiwebview. However, I would like to allow a user to select text and perform some action with the selected text (google it). Apple has done this sort of thing with iBooks. When you click on a word you can choose to look up the word in a dictionary. How can I do the same thing with Webview?

UIMenuController似乎是我需要看的东西。但我找不到任何有关如何执行此操作的示例代码。我是iPhone开发的新手请帮忙。

UIMenuController seems to be what I need to look at. But I couldn't find any sample code on how to do this. I'm new to iPhone development please help.

推荐答案

从iOS 3.2开始你可以使用 UIMenuController 添加额外的 UIMenuItems 到在UIWebView中选择文本时出现的系统菜单。这是一个简单的例子：

Starting in iOS 3.2 you can use UIMenuController to add additional UIMenuItems to the system menu that appears when selecting text in a UIWebView. Here's a simple example:

- (void)viewDidLoad {
    [super viewDidLoad];

    UIMenuItem *defineItem = [[[UIMenuItem alloc] initWithTitle:@"Define" action:@selector(defineSelection:)] autorelease];
    [[UIMenuController sharedMenuController] setMenuItems:[NSArray arrayWithObject:defineItem]];
}

- (void)defineSelection:(id)sender {
    NSString *selection = [webView stringByEvaluatingJavaScriptFromString:@"window.getSelection().toString()"];
    // Do something with the selection
}

Apple描述了这是如何工作的在添加自定义编辑菜单项 设备功能编程指南部分。

Apple describes how this works in the Adding Custom Edit Menu Items section of the Device Features Programming Guide.

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