ios – 单击选定UIButton时未显示UIButton突出显示状态

基本上在突出显示的状态下,我将* .png图像应用为我的UIButton BACkgroundImage以产生按下效果.

但是如果按钮已经处于选中状态当我再次点击它时,我只是看不到突出显示的状态,但它直接进入正常状态！

观看问题 – > Video of the Issue!

请帮忙

//0    init UIButton
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x,y,aSide,aSidE)];

//1    Give it a BACkgroundColor
[button setBACkgroundColor:aColor];

[..]

//2    Set titleLabel and its style
[button settitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[button settitleColor:[UIColor redColor] forState:UIControlStateSELEcted];
[button settitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];

UIImage *shadowImage = [UIImage imagenamed:kBtnShadow];
shadowImage = [shadowImage stretchableImageWithLeftCapWidth:floorf(shadowImage.size.width/2) topCapHeight:floorf(shadowImage.size.height/2)];

[button setBACkgroundImage:shadowImage forState: UIControlStateHighlighted];

[button settitle:aLabel forState:  UIControlStateNormal];

//3    Assign tag and Action
[button setTag:tag];
[button addTarget:target action:a forControlEvents:UIControlEventTouchUpInside];