iOS button 点击高亮的时候不变灰, 把按钮类型改为自定义即可
_continueBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_continueBtn setBackgroundImage:[UIImage imageNamed:@"mhsq_history_continue"] forState:UIControlStateNormal];
[_continueBtn setBackgroundImage:[UIImage imageNamed:@"mhsq_history_continue_h"] forState:UIControlStateHighlighted];
如果类型是 System
_continueBtn = [UIButton buttonWithType:UIButtonTypeSystem];
_continueBtn.adjustsImageWhenHighlighted = NO;
或者把图片设置为同一张,也行