webView添加手势的冲突问题

    首先webView 上添加两个手势,

    // 点击webView 中心区域,从上面和下面弹出两个菜单栏

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapWebView:)];

        tap.delegate  = self;

        [self.webView addGestureRecognizer:tap];

        // 长按webView弹出 UIMenuViewController 增长复制 地图 百科等功能.

        UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressWebView:)];

        [longPressGesture setDelegate:self];

        [self.webView addGestureRecognizer:longPressGesture];

 

要想让点击手势起做用须要实现 :

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

    if ([otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && [gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {

       return YES;

}

 

这样就技能响应点击手势 又能响应长按手势了,可是还有一个问题,那就是长按 webView 中心区域时 既会出现UIMenuController 又会弹出上下菜单栏......!

为了解决这个问题就须要继续在这个手势的代理方法中作手脚了.

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

    /**

     *  若是第一个手势是点击第二个是长按就返回NO 不支持同时响应长按和点击手势

     */

    if ([otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && [gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {

        return NO;

    } else {

       return YES;

    }

}

这样一来 长按中心区域就只会出现,U了 而不会弹出上下菜单栏. tap 和 longPress手势又都能响应了!

--------

::要想让UIMenuController弹出菜单控制器必须实现:

-(BOOL)canBecomeFirstResponder

{

    return YES;

}

---复制的实现

 

-(void)menuCopy:(id)sender

{

    [self.webView performSelector:@selector(copy:)];

} 选择和全选的实现同copy!