iOS8 UITabBar图标变蓝色

        最近将Xcode的Base SDK升级到iOS8.0以后，发现使用的系统级的UITabBar，图标在selected状态都变成蓝色，很郁闷。
        查找资料后发现UITabBarItem.h里面说的很清楚，
        /* These methods are now deprecated. Please use -initWithTitle:image:selectedImage:.*/
        - (void)setFinishedSelectedImage:(UIImage *)selectedImage withFinishedUnselectedImage:(UIImage *)unselectedImage NS_DEPRECATED_IOS(5_0,7_0,"Use initWithTitle:image:selectedImage: or the
image and selectedImage properties along with UIImageRenderingModeAlwaysOriginal");
        UIImageRenderingModeAlwaysOriginal（ 始终绘制图片原始状态）是关键，即需要对图片多做一次小小的处理，即

//构造TabBarItem：title-标题、image-图片、selectedImage-选中时图片
- (UITabBarItem *)itemWithTitle:(NSString *)title image:(UIImage *)image selectedImage:(UIImage *)selectedImage
{
//始终绘制图片原始状态
image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
selectedImage = [selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UITabBarItem *tabBarItem = [[UITabBarItemalloc]initWithTitle:titleimage:imageselectedImage:selectedImage];
return tabBarItem;
}

        这样，在构建TabBarItem时，直接调用这个方法就可以了。