01
让tabBar的图片保持原样.图片渲染的处理
ctrl.tabBarItem.selectedImage = [[UIImage imageNamed:[NSString stringWithFormat:@"%@_selected",imageName]]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
02
//给底部的标题设置颜色
//初始化一个文字属性字典 把文字属性字典添加
NSMutableDictionary *Mdic = [NSMutableDictionary dictionary];
Mdic[NSForegroundColorAttributeName] = [UIColor orangeColor];
[ctrl.tabBarItem setTitleTextAttributes:Mdic forState:UIControlStateSelected];
03 设置tabBar图片的偏移量
//设置图片的偏移量
ctrl.tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -5, 0);