重新发出触摸事件

Question

我正在尝试创建一个覆盖视图，该视图监视触摸然后消失，但还将触摸事件转发到视图下方的任何内容。

我的测试应用程序有一个内部带有按钮的视图。我将覆盖视图添加为另一个子视图（本质上与按钮同级），它占据了整个屏幕。

对于我尝试的两种解决方案，覆盖层都会保持状态以确定它如何响应触摸。当接收到touchesBegan事件时，覆盖层将停止响应hitTest或pointInside，直到收到touchesCancelled或touchesEnded。

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    if(_respondToTouch)
    {
        NSLog(@"Responding to hit test");
        return [super hitTest:point withEvent:event];
    }
    NSLog(@"Ignoring hit test");
    return nil;
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    if(_respondToTouch)
    {
        NSLog(@"Responding to point inside");
        return [super pointInside:point withEvent:event];
    }
    NSLog(@"Ignoring point inside");
    return NO;
}

对于我的第一种方法，我尝试重新发出事件：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if(!_respondToTouch)
    {
        NSLog(@"Ignoring touches began");
        return;
    }
    NSLog(@"Responding to touches began");
    _respondToTouch = NO;

    [[UIApplication sharedApplication] sendEvent:event];
}

- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches cancelled");
    _respondToTouch = YES;
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches ended");
    _respondToTouch = YES;
}

但是，按钮没有响应重新发出的事件。

我的第二种方法是使用 hitTest 来发现覆盖层下方的视图（我的按钮），然后直接向其发送 TouchXXX 消息：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches began");
    _respondToTouch = NO;
    UITouch* touch = [touches anyObject];
    _touchDelegate = [[UIApplication sharedApplication].keyWindow hitTest:[touch locationInView:self.superview] withEvent:event];
    CGPoint locationInView = [touch locationInView:_touchDelegate];
    NSLog(@"Sending touch %@ to view %@. location in view = %f, %f", touch, _touchDelegate, locationInView.x, locationInView.y);
    [_touchDelegate touchesBegan:touches withEvent:event];
}

- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches cancelled");
    [_touchDelegate touchesCancelled:touches withEvent:event];
    _respondToTouch = YES;
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches ended");
    [_touchDelegate touchesEnded:touches withEvent:event];
    _respondToTouch = YES;
}

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches moved");
    [_touchDelegate touchesMoved:touches withEvent:event];
}

它找到按钮（根据日志），但按钮在以下情况下根本没有反应：我对它调用touchesXXX。

我不确定还可以尝试什么，因为按钮不会响应直接调用 TouchBegan =/