ios – 自定义UIButton触摸时不突出显示

我有一个方法创建一个自定义UIButton,允许我使用QuartzCore更改按钮的颜色.但触摸时按钮不会突出显示.

- (UIButton *)makeHeaderButton {
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    UIFont *textFont = [UIFont boldSystemFontOfSize:12];
    UIColor *textColor = [UIColor colorWithRed:80/255.0 green:109/255.0 blue:145/255.0 alpha:1.0];
    UIColor *BACkgroundColor = [UIColor colorWithRed:250/255.0 green:250/255.0 blue:250/255.0 alpha:1.0];
    [button settitleColor:textColor forState:UIControlStateNormal];
    button.titleLabel.font = textFont;
    button.autoresizesSubviews = YES;
    button.layer.cornerRadius = 8;
    button.layer.borderWidth = 1;
    // next 2 properties set using QuartzCore class,no other way to set button colors
    button.layer.borderColor = [UIColor grayColor].CGColor;
    button.layer.BACkgroundColor = BACkgroundColor.CGColor;
    button.clipsToBounds = YES;
    return button;
}

如何使这些按钮像常规的圆形按钮一样突出显示？@H_197_5@