本篇主要对项目中适配iOS13 暗黑模式 TabBarItem图标更换的总结。方便日后复习。
一.暗黑模式下只有让unselectTabbarItem图标发生改变
操作方式：
1.先将一种模式下的unselectTabbarItem图标拉进Assets.xcassets中
2.选中图片属性的Appearances设置为Any,Dark，将另外一种对应模式下的图片放到对应位置
3.我们直接在创建UITabarBarItem的时候调用Assets.xcassets中图片的名称
4.操作如下图：
只有未选中图片切换暗黑模式.png
5.代码如下：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
tabbar = [[UITabBarController alloc]init];
//情况1:暗黑模式切换中，只有unselectTabbarItem变化
// [self case1_initialVC];
//情况2:暗黑模式切换中，unselectTabbarItem跟selectTabbarItem 都需要变化
[self case2_initialVC];
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = tabbar;
[self.window makeKeyAndVisible];
return YES;
}
//情况1
-(void)case1_initialVC {
self.titleS = @[@"vc1",@"vc2",@"vc3",@"vc4"];
self.normalImgS = @[@"tabbar_1_normal",@"tabbar_2_normal",@"tabbar_3_normal",@"tabbar_4_normal"];
self.selectImgS = @[@"tabbar_1_select",@"tabbar_2_select",@"tabbar_3_select",@"tabbar_4_select"];
oneVc = [ViewController new];
[self addOneChildVC:oneVc title:self.titleS[0] normalImage:self.normalImgS[0] selectImage:self.selectImgS[0]];
twoVc = [ViewController new];
[self addOneChildVC:twoVc title:self.titleS[1] normalImage:self.normalImgS[1] selectImage:self.selectImgS[1]];
threeVc = [ViewController new];
[self addOneChildVC:threeVc title:self.titleS[2] normalImage:self.normalImgS[2] selectImage:self.selectImgS[2]];
fourVc = [ViewController new];
[self addOneChildVC:fourVc title:self.titleS[3] normalImage:self.normalImgS[3] selectImage:self.selectImgS[3]];
}
-(void)addOneChildVC:(UIViewController *)subVC title:(NSString *)title normalImage:(NSString *)normalStr selectImage:(NSString *)selectStr {
subVC.tabBarItem.title = title;
subVC.tabBarItem.image = [[UIImage imageNamed:normalStr] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
subVC.tabBarItem.selectedImage = [[UIImage imageNamed:selectStr] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UINavigationController *navc = [[UINavigationController alloc]initWithRootViewController:subVC];
navc.navigationBar.tintColor = [UIColor ios_13LigthColor:[UIColor redColor] darkColor:[UIColor whiteColor]];
navc.navigationItem.title = title;
[tabbar addChildViewController:navc];
if (@available(iOS 13.0, *)) {
[UITabBar appearance].barTintColor = [UIColor ios_13LigthColor:[UIColor whiteColor] darkColor:[UIColor blackColor]];
navc.navigationBar.barTintColor = [UIColor ios_13LigthColor:[UIColor blueColor] darkColor:[UIColor redColor]];
[subVC.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor ios_13LigthColor:[UIColor redColor] darkColor:[UIColor whiteColor]]} forState:UIControlStateSelected];
[subVC.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor ios_13LigthColor:[UIColor blueColor] darkColor:[UIColor whiteColor]]} forState:UIControlStateNormal];
tabbar.tabBar.backgroundColor = [UIColor ios_13LigthColor:[UIColor whiteColor] darkColor:[UIColor blackColor]];
tabbar.tabBar.barTintColor = [UIColor ios_13LigthColor:[UIColor whiteColor] darkColor:[UIColor blackColor]];
}
}
6.效果图如下：
日间模式.png
夜间模式.png
7.注意点：
a.即使将selectTabbarItem图标的
Appearances设置为Any,Dark，将另外一种对应模式下的图片放到对应位置，切换暗黑模式也不会起作用
b.程序一旦重新启动，tabbarItem图标会根据暗黑模式正确显示
二.暗黑模式下TabbarItem图标均发生改变
操作方式：
1.我们在工程中导入两套图片（夜间模式和日间模式）
2.按照正常的创建方式创建TabbarItem图标
3.根据UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark 设置对应的图片
4.当切换模式的时候我们需要重新给TabbarItem重新一下添加image，因为tabbar用的系统类UITabBarController,如果想要监听模式改变，我们创建了一个分类就好，即UITabBarController+iOS13_DartModel
5.代码如下：
//情况2
-(void)case2_initialVC {
self.titleS = @[@"vc1",@"vc2",@"vc3",@"vc4"];
//日间模式
self.normalImgS = @[@"tabbar_news_normal_2",@"tabbar_video_normal_2",@"tabbar_icourse_normal_2",@"tabbar_mine_normal_2"];
self.selectImgS = @[@"tabbar_news_select_2",@"tabbar_video_select_2",@"tabbar_icourse_select_2",@"tabbar_mine_select_2"];
//夜间模式
self.normalDartImgS = @[@"tabbar_news_normal_1",@"tabbar_video_normal_1",@"tabbar_icourse_normal_1",@"tabbar_mine_normal_1"];
self.selectDartImgS = @[@"tabbar_news_select_1",@"tabbar_video_select_1",@"tabbar_icourse_select_1",@"tabbar_mine_select_1"];
oneVc = [ViewController new];
twoVc = [ViewController new];
threeVc = [ViewController new];
fourVc = [ViewController new];
if (UITraitCollection.currentTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {//夜间模式
[self addOneChildVC:oneVc title:self.titleS[0] normalImage:self.normalDartImgS[0] selectImage:self.selectDartImgS[0]];
[self addOneChildVC:twoVc title:self.titleS[1] normalImage:self.normalDartImgS[1] selectImage:self.selectDartImgS[1]];
[self addOneChildVC:threeVc title:self.titleS[2] normalImage:self.normalDartImgS[2] selectImage:self.selectDartImgS[2]];
[self addOneChildVC:fourVc title:self.titleS[3] normalImage:self.normalDartImgS[3] selectImage:self.selectDartImgS[3]];
} else {
[self addOneChildVC:oneVc title:self.titleS[0] normalImage:self.normalImgS[0] selectImage:self.selectImgS[0]];
[self addOneChildVC:twoVc title:self.titleS[1] normalImage:self.normalImgS[1] selectImage:self.selectImgS[1]];
[self addOneChildVC:threeVc title:self.titleS[2] normalImage:self.normalImgS[2] selectImage:self.selectImgS[2]];
[self addOneChildVC:fourVc title:self.titleS[3] normalImage:self.normalImgS[3] selectImage:self.selectImgS[3]];
}
}
UITabBarController+iOS13_DartModel 分类如下：
@implementation UITabBarController (iOS13_DartModel)
-(void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
if (@available(iOS 13.0, *)){
AppDelegate *delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
UITabBarController *tabbar = (UITabBarController *)[UIApplication sharedApplication].keyWindow.rootViewController;
NSArray *navcs = tabbar.viewControllers;
if (previousTraitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {
int i = 0;
for (UINavigationController *navc in navcs) {
UIViewController *vc = (UIViewController *)([navc.viewControllers firstObject]);
vc.tabBarItem.selectedImage = [[UIImage imageNamed:delegate.selectImgS[i]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
vc.tabBarItem.image = [[UIImage imageNamed:delegate.normalImgS[i]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
i++;
}
[[UITabBar appearance] setTintColor:[UIColor whiteColor]];
} else {
int i = 0;
for (UINavigationController *navc in navcs) {
UIViewController *vc = (UIViewController *)([navc.viewControllers firstObject]);
vc.tabBarItem.selectedImage = [[UIImage imageNamed:delegate.selectDartImgS[i]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
vc.tabBarItem.image = [[UIImage imageNamed:delegate.normalDartImgS[i]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
i++;
}
[[UITabBar appearance] setTintColor:[UIColor blackColor]];
}
}
}
@end
6.效果图如下：
日间模式.png
夜间模式.png
7.注意点：
demo运行的时候，如果想验证情况1，需要把
UITabBarController+iOS13_DartModel分类去掉；
如果想验证情况2，需要把UITabBarController+iOS13_DartModel分类添加
demo地址：https://github.com/sisios/DartMode_TabBarItemImage.git
本篇学习先记录到此，感谢阅读，如有错误，不吝赐教。