iOS 之点击按钮改变状态的图片

case401:

break;

case402:

{

[_timeLineButtonsetImage:[UIImageimageNamed:@"timeLineBefore"]forState:UIControlStateNormal];

break;

}

case 403:

{

[_timeLineButtonsetImage:[UIImageimageNamed:@"timeLineBefore"]forState:UIControlStateNormal];

break;

}

default:

break;

}

}