需求背景：
在有tabbar的首页点击navigationbar的时间选择器，弹出时间选择器页面，tabbar隐藏，对时间选择器进行选择

难点：
tabbar隐藏之后，弹出来的时间选择器不能选择原来tabbar位置的地方，点击无响应

解决办法：

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
if (!self.isUserInteractionEnabled || self.isHidden || self.alpha <= 0.01) {
    return nil;
}
if ([self pointInside:point withEvent:event]) {
    for (UIView *subView in [self.subviews reverseObjectEnumerator]) {
        CGPoint convertedPoint = [subView convertPoint:point fromView:self];
        UIView *hitTestView = [subView hitTest:convertedPoint withEvent:event];
        if (hitTestView) {
            return hitTestView;
        }
    }
    return self;
} else {
    for (UIView *subView in [self.subviews reverseObjectEnumerator]) {
        CGPoint convertedPoint = [subView convertPoint:point fromView:self];
        UIView *hitTestView = [subView hitTest:convertedPoint withEvent:event];
        if (hitTestView) {
            return hitTestView;
        }
    }
    return nil;
}
return nil;
}

重写controller的view的hittest方法，让其在点击tabbar的位置时进行相应

另外，在controller的loadview方法里，load重写的这一个view

- (void)loadView
{

MJHomeControllerView *view = [[MJHomeControllerView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.view = view;
}