UIView相应事件

UIView可不可以设置相应事件范围。比如一个正方向的view，我想让它左边部分响应事件。右边部分不响应事件，但可以把事件传递给后面的responder去响应。

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- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event;
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event;

-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    CGRect rect = CGRectMake(0, 0, self.view.bounds.size.width/2, self.view.bounds.size.height);
    if (CGRectContainsPoint(rect, point)) 
        return [super hitText:point withEvent:event];
    else
        return nil; 
}