如何检测UIWebView上的触摸

On UIWebview, how can I detect a touch?

在UIWebview上，如何检测触摸？

But not when user clicks some URL or touching a control.

但不是在用户点击某个URL或触摸控件时。

Is it possible to handle it?

有可能处理它吗？

5 个解决方案

#1

Use UIGestureRecognizerDelegate method:

使用UIGestureRecognizerDelegate方法：

Add UIGestureRecognizerDelegate in declaration file (i.e. your .h file)

在声明文件中添加UIGestureRecognizerDelegate（即您的.h文件）

Step 1: Just set the delegate of gestureRecognizer: (in .m file viewDidLoad)

第1步：只需设置gestureRecognizer的委托:(在.m文件viewDidLoad中）

UITapGestureRecognizer *webViewTapped = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];
webViewTapped.numberOfTapsRequired = 1;
webViewTapped.delegate = self;
[offScreenWebView addGestureRecognizer:webViewTapped];
[webViewTapped release];

Step 2: Override this function: (in .m file)

第2步：覆盖此功能:(在.m文件中）

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

Step 3: Now implement the tapAction function:

第3步：现在实现tapAction功能：

- (void)tapAction:(UITapGestureRecognizer *)sender
{    
    NSLog(@"touched");

    // Get the specific point that was touched
    CGPoint point = [sender locationInView:self.view];
}

#2

The accepted answer is great if you only need to detect taps. If you need to detect all touches, the best way is to create a new UIView subclass and place it over the webview. In the subclass you can detect touches using hitTest:

如果您只需要检测水龙头，那么接受的答案就很棒。如果需要检测所有触摸，最好的方法是创建一个新的UIView子类并将其放在webview上。在子类中，您可以使用hitTest检测触摸：

TouchOverlay.h

@class TouchOverlay;

@protocol TouchOverlayDelegate <NSObject>

@optional
- (void)touchOverlayTouched:(TV4TouchOverlay *)touchOverlay;

@end


@interface TouchOverlay : UIView
@property (nonatomic, unsafe_unretained) id <TouchOverlayDelegate> delegate;
@end

Touchoverlay.m

@implementation TouchOverlay

- (id)initWithFrame:(CGRect)frame {
  self = [super initWithFrame:frame];
  return self;
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
  UIView *hitView = [super hitTest:point withEvent:event];
  if (hitView == self) {
    if (self.delegate && [self.delegate respondsToSelector:@selector(touchOverlayTouched:)]) {
      [self.delegate touchOverlayTouched:self];
    }
    return nil;     // Tell the OS to keep looking for a responder
  }
  return hitView;
}

@end

#3

Everything that inherits from UIResponder can handle touches (so does UIWebView). Read the doc: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIResponder_Class/Reference/Reference.html

从UIResponder继承的所有内容都可以处理触摸（UIWebView也是如此）。阅读文档：http：//developer.apple.com/library/ios/#documentation/uikit/reference/UIResponder_Class/Reference/Reference.html

You'll have to use:

你必须使用：

touchesBegan:withEvent:

Edit: Adding the comment here for clarity-

编辑：为了清楚起见，在此处添加评论

I believe then there's no clean way of doing it, you can either override the hittest withEvent method like this or do a hack like this: overriding UIView

我相信那时没有干净的方法，你可以像这样覆盖hittest withEvent方法，或者像这样做一个hack：覆盖UIView

#4

Note that the accepted answer above will only capture tap gestures (touchDown and touchUp without a drag in between), and that swipe gestures will be ignored.

请注意，上面接受的答案将仅捕获轻击手势（touchDown和touchUp之间没有拖动），并且将忽略滑动手势。

For my purposes I needed to be informed of both, and so I added swipe gesture recognizers appropriately. (Note that despite being a bit field, you can't OR together swipe gesture recognizers' direction property, so 4 gesture recognizers are required to detect any swipe).

为了我的目的，我需要被告知两者，所以我适当地添加了滑动手势识别器。（请注意，尽管是一个位字段，但您无法一起滑动手势识别器的方向属性，因此需要4个手势识别器来检测任何滑动）。

// Note that despite being a bit field, you can't `OR` together swipe gesture
// recognizers' `direction` property, so 4 gesture recognizers are required
// to detect any swipe
for (NSNumber * swipeDirection in @[@(UISwipeGestureRecognizerDirectionUp), @(UISwipeGestureRecognizerDirectionDown), @(UISwipeGestureRecognizerDirectionLeft), @(UISwipeGestureRecognizerDirectionRight)]) {

    UISwipeGestureRecognizer * swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(timerReset:)];
    swipe.direction = [swipeDirection integerValue];
    swipe.delegate = self;
    [rootWebView addGestureRecognizer:swipe];
}

#5

-1

Do you mean you want to override the options that popup when they hold down on a link? I managed to get one to work with this tutorial/guide but the one posted here is still slightly buggy and needs you to do some fine tuning: http://www.icab.de/blog/2010/07/11/customize-the-contextual-menu-of-uiwebview/

你的意思是你想要覆盖他们按住链接时弹出的选项吗？我设法让一个人使用本教程/指南，但是这里发布的那个仍然有点错误，需要你做一些微调：http：//www.icab.de/blog/2010/07/11/customize-在上下文菜单-的-的UIWebView /

#1