iphone - 使用 singleTap 在 UIWebView 中选择文本

Question

我有 UIWebView 用于显示文章。这些都是 HTML 页面。我需要从文章中选择文本。所以，我使用 UIMenucontroller 来选择选项。我需要在用户点击 singleTap 时选择文本。但是当使用 singleTap 时什么也没有发生。

-(void)ViewDidLoad{

UITapGestureRecognizer *singletapp=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(singleTap:)];
    singletapp.numberOfTapsRequired=1;

    [wbCont addGestureRecognizer:singletapp];

}

单击：

-(void)singleTap:(UIGestureRecognizer *)gestureRecognizer
 {

     NSLog(@"single tap");

 CGPoint touchPoint = [gestureRecognizer locationInView:self.view];

 NSString *js = [NSString stringWithFormat:@"document.elementFromPoint(%f, %f).toString()", touchPoint.x, touchPoint.y];

 NSString * tagName = [wbCont stringByEvaluatingJavaScriptFromString:js];

 NSLog(@"Selected Name: %@",tagName);

 }

Answer 1

在您的 viewDidLoad 中添加此代码

[[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(resetMenuController)
                                                     name:UIMenuControllerDidHideMenuNotification
                                                   object:nil];

在您的类中添加此代码。控制器将不会显示

- (void) resetMenuController
{
    UIMenuItem *notesMI = [[UIMenuItem alloc] initWithTitle: @""
                                                     action: @selector(sample)];

    [[UIMenuController sharedMenuController] setMenuItems:@[notesMI]];
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    if (action == @selector(sample))
    {
        return YES;
    }
    return NO;
}

- (void) sample{}