在iOS6中，tableViewCell中有UIButton。cell被选中的时候，button会显示高亮状态，如果不希望这样，需要重写cell的setHightlighted和setSelected方法

- (void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated {
    [super setHighlighted:highlighted animated:animated];
    self.yourButton.highlighted = NO;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];
    self.yourButton.selected = NO;
    // If you don't set highlighted to NO in this method,
    // for some reason it'll be highlighed while the
    // table cell selection animates out
    self.yourButton.highlighted = NO;
}