只要把图片渲染关掉就OK了
用代码解决
- (UIImage *)imageWithRenderingMode:(UIImageRenderingMode)renderingMode
UIImageRenderingModeAlwaysOriginal这个枚举值是声明这张图片要按照原来的样子显示
例如: [[UIImage imageNamed:@"tabbar_contacts_press"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];