ios - 无法禁用复制 UIWebView

Question

在我的 ViewController 的头文件中我有:

@interface CaseStudyChoiceViewController : UIViewController <UIWebViewDelegate>

@property (strong, nonatomic) IBOutlet UIWebView *myWebView;

@end

然后在ViewDidLoad方法中的.m文件中:

[_myWebView setDelegate:self];

最后:

#pragma mark - WebView Delegate Methods

-(BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    if (action == @selector(copy:)   || 
        action == @selector(paste:)  || 
        action == @selector(select:) || 
        action == @selector(cut:)    || 
        action == @selector(selectAll:))
    {
        NSLog(@"Selector is %@", NSStringFromSelector(action));
        return NO;
    }
    else
    {
        return [super canPerformAction:action withSender:sender];
    }

   //I tried the code below as well and got the same result
   /*
    UIMenuController *menuController = [UIMenuController sharedMenuController];
    if (menuController) 
    {
        [UIMenuController sharedMenuController].menuVisible = NO;
    }
    return NO;
   */
}

我遇到的问题是，这将不会禁用复制功能。当我运行它时，NSLog 输出是:

    2013-12-30 21:39:28.794 PCO - CLS[45238:70b] Selector is cut:
    2013-12-30 21:39:28.794 PCO - CLS[45238:70b] Selector is select:
    2013-12-30 21:39:28.795 PCO - CLS[45238:70b] Selector is selectAll:
    2013-12-30 21:39:28.795 PCO - CLS[45238:70b] Selector is paste:

copy: 永远不会出现在 canPerformAction 方法中。关于我可以在哪里捕获它的任何想法？

这里的最终结果是，当用户在 UIWebView 中进行长触摸时，会弹出两个选项，Copy 和 Define。我只想要定义。

Answer 1

它适用于 ios 7.0 -> 9.2

-(void)webViewDidFinishLoad:(UIWebView *)webView
{
[webView stringByEvaluatingJavaScriptFromString:
   @"document.documentElement.style.webkitUserSelect='none';"];

[webView stringByEvaluatingJavaScriptFromString:
   @"document.documentElement.style.webkitTouchCallout='none';"];
}