在UITableView上添加了UITapGestureRecognizer后會導致didSelectRowAtIndexPath失效，原因是UITapGestureRecognizer會截取了tableView的touch事件，導致無法響應行選擇，解決方法是重寫UIGestureRecognizerDelegate中的

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    if ([NSStringFromClass([touch.view class]) isEqualToString:@"UITableViewCellContentView"]) {//如果當前是tableView
        //做自己想做的事
        return NO;
    }
    return YES;   
}