1 //IOS8以前使用的是：
2
3 UITabBarItem *photoItem = [[UITabBarItem alloc] initWithTitle:@"首页" image:[UIImage imageNamed:@"app2"] tag:0];
4
5 photo.tabBarItem = photoItem;
6
7 [photo.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"app1"] withFinishedUnselectedImage:[UIImage imageNamed:@"app2"]];
8
9 [photoItem release];
1 //使用新的API方法来初始化tabBarItem
2 - (instancetype)initWithTitle:(NSString *)title image:(UIImage *)image selectedImage:(UIImage *)selectedImage
3 //同时对使用的UIImage设置一下UIImageRenderingMode，使用UIImageRenderingModeAlwaysOriginal
4
5 //用例：
6 UIImage * normalImage = [[UIImage imageNamed:@"nor.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
7 UIImage * selectImage = [[UIImage imageNamed:@"select.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
8
9 UITabBarItem * tabBarItem = [[UITabBarItem alloc]initWithTitle:@"" image:normalImage selectedImage:selectImage];
