webView添加手势的冲突问题

小文0111

首先webView 上添加两个手势,

1. <p style="line-height: 28px;">    // 点击webView 中心区域,从上面和下面弹出两个菜单栏</p><p style="line-height: 28px;">        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapWebView:)];</p><p style="line-height: 28px;">        tap.delegate  = self;</p><p style="line-height: 28px;">        [self.webView addGestureRecognizer:tap];</p><p style="line-height: 28px;">        // 长按webView弹出 UIMenuViewController 增加复制 地图 百科等功能.</p><p style="line-height: 28px;">        UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressWebView:)];</p><p style="line-height: 28px;">        [longPressGesture setDelegate:self];</p><p style="line-height: 28px;">        [self.webView addGestureRecognizer:longPressGesture];</p>

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要想让点击手势起作用需要实现 :

1. <p style="line-height: 28px;">- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {</p><p style="line-height: 28px;">    if ([otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && [gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {</p><p style="line-height: 28px;">       return YES;</p><p style="line-height: 28px;">}</p>

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这样就技能响应点击手势 又能响应长按手势了,但是还有一个问题,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需要继续在这个手势的代理方法中做手脚了.

1. <p style="line-height: 28px;">- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {</p><p style="line-height: 28px;">    /**</p><p style="line-height: 28px;">     *  如果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</p><p style="line-height: 28px;">     */</p><p style="line-height: 28px;">    if ([otherGestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && [gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {</p><p style="line-height: 28px;">        return NO;</p><p style="line-height: 28px;">    } else {</p><p style="line-height: 28px;">       return YES;</p><p style="line-height: 28px;">    }</p><p style="line-height: 28px;">}</p>

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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!

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::要想让UIMenuController弹出菜单控制器必须实现:

1. <p style="line-height: 28px;">-(BOOL)canBecomeFirstResponder</p><p style="line-height: 28px;">{</p><p style="line-height: 28px;">    return YES;</p><p style="line-height: 28px;">}</p><p style="line-height: 28px;">---复制的实现</p>
   
2. <p style="line-height: 28px;">-(void)menuCopy:(id)sender</p><p style="line-height: 28px;">{</p><p style="line-height: 28px;">    [self.webView performSelector:@selector(copy:)];</p><p style="line-height: 28px;">} </p>

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选择和全选的实现同copy!