iOS button 點擊高亮的時候不變灰, 把按鈕類型改爲自定義即可
_continueBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[_continueBtn setBackgroundImage:[UIImage imageNamed:@"mhsq_history_continue"] forState:UIControlStateNormal];
[_continueBtn setBackgroundImage:[UIImage imageNamed:@"mhsq_history_continue_h"] forState:UIControlStateHighlighted];
如果類型是 System
_continueBtn = [UIButton buttonWithType:UIButtonTypeSystem];
_continueBtn.adjustsImageWhenHighlighted = NO;
或者把圖片設置爲同一張,也行