标题文字
- viewController：
self.title - 返回值是
view的方法去设置titleView
标题颜色
// iOS 15之前
bar.titleTextAttributes = @{NSForegroundColorAttributeName: itemColor};
// iOS 15之后
if (@available(iOS 13.0, *)) { // 因为 api 是从13出的
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
appearance.titleTextAttributes = @{NSForegroundColorAttributeName: itemColor};
bar.standardAppearance = appearance;
bar.scrollEdgeAppearance = appearance;
}
导航栏颜色
// iOS 15 之前
// 如果设置了背景图片为空图片,必须要禁用穿透效果,才能看到 barTintColor -- self.navigationBar.translucent = NO
navigationBar.barTintColor
或 navigationBar.subviews[0]
// iOS 15 之后
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
appearance.backgroundColor = UIColor.whiteColor;
...
naviBar.standardAppearance = appearance;
naviBar.scrollEdgeAppearance = appearance;
导航栏控件颜色
naviBar.tintColor
导航栏隐藏
naviBar.hidden = true
导航栏透明 -- 隐藏分隔线
// 法一 navigationContentView 透明
// 参考：《UINavgationBar全透明一行代码实现/ 任意颜色》
// 但在 iOS 15 适配了导航栏后，设置alpha的方法会使适配无效
navigationBar.subviews[0].alpha = 0;
// 法二 背景色置空 + 阴影图片置空
// 在 iOS 15 适配了导航栏时需要显式标明 shadowColor(在 shadowImage 为 nil 时，shadowColor 生效)，故虽已经隐藏了分割线，但导航栏下方仍会出现类似分割线的阴影
// 解决方案：需手动标明 shadowColor 为 clearColor 或 nil
[nav.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[nav.navigationBar setShadowImage:[UIImage new]];
// iOS15 后加入这段代码
if (@available(iOS 13.0, *)) { // 因为 api 是从13出的
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
appearance.shadowColor = UIColor.clearColor;
bar.standardAppearance = appearance;
bar.scrollEdgeAppearance = appearance;
}
iOS15 导航栏及tabBar适配
解决 iOS 15 中页面跳转导航栏暂存及无底色问题
分析：类似 VC，必须要设置 backgroundColor
- (void)setupAppearance {
Class baseClass = UINavigationController.class; // 可定制某一个类型
UIColor *bgColor = UIColor.whiteColor;
UIColor *separatorColor = UIColor.redColor;
NSDictionary *defaultTitleTextAttr = @{NSForegroundColorAttributeName: UIColor.blackColor};
[UITabBar appearance].barTintColor = bgColor;
UINavigationBar *naviBar = [UINavigationBar appearanceWhenContainedInInstancesOfClasses:@[baseClass]];
naviBar.barTintColor = bgColor; // 设置导航栏颜色(ios15 之前生效)
naviBar.shadowImage = [UIImage imageWithColor: separatorColor];
[naviBar setBackgroundImage:[UIImage imageWithColor:bgColor] forBarMetrics:UIBarMetricsDefault];
naviBar.titleTextAttributes = defaultTitleTextAttr;
if (@available(iOS 13.0, *)) {
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
appearance.backgroundColor = bgColor; //设置导航栏背景色
appearance.shadowColor = separatorColor; // 设置分割线默认颜色
appearance.titleTextAttributes = defaultTitleTextAttr; //设置导航条标题颜色
[UINavigationBar appearance].standardAppearance = appearance;
[UINavigationBar appearance].scrollEdgeAppearance = appearance;
}
}
baseVC 提供设置导航栏接口
目的：提供快捷方法，并在页面跳转时自动复原为默认效果
// baseVC.h
/// 单页面设置隐藏导航栏分割线
@property (nonatomic, assign) BOOL hideNaviBarSeparatorLine;
/// 单页面设置导航栏透明度
@property (nonatomic, assign) BOOL isNaviBarTranslucent;
/// 单页面设置导航栏标题字体
@property (nonatomic, copy) NSDictionary<NSAttributedStringKey, id> *naviBarTitleTextAttributes;
// baseVC.m
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
if (self.navigationController &&
(self.hideNaviBarSeparatorLine || self.isNaviBarTranslucent || self.naviBarTitleTextAttributes.count > 0)) {
[self base_updateNaviBarStyle];
}
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
if (self.navigationController &&
(self.hideNaviBarSeparatorLine || self.isNaviBarTranslucent || self.naviBarTitleTextAttributes.count > 0)) {
[self base_resetNaviBarStyle];
}
}
- (void)base_updateNaviBarStyle {
UIColor *separatorColor = UIColor.redColor;
NSDictionary *defaultTextAttributes = @{NSForegroundColorAttributeName: UIColor.blackColor};
UINavigationBar *bar = self.navigationController.navigationBar;
[bar setBackgroundImage:UIImage.new forBarMetrics:UIBarMetricsDefault];
UIImage *shadowImage = UIImage.new;
if (!self.hideNaviBarSeparatorLine) {
shadowImage = [UIImage imageWithColor:separatorColor];
}
bar.shadowImage = shadowImage;
bar.translucent = self.isNaviBarTranslucent;
NSDictionary *textAttributes = self.naviBarTitleTextAttributes ?: defaultTextAttributes;
bar.titleTextAttributes = textAttributes;
if (@available(iOS 13.0, *)) {
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
if (self.isNaviBarTranslucent) {
[appearance configureWithTransparentBackground];
} else {
[appearance configureWithOpaqueBackground];
}
//设置导航栏背景色
appearance.backgroundColor = self.isNaviBarTranslucent ? UIColor.clearColor : UIColor.whiteColor;
appearance.shadowColor = self.hideNaviBarSeparatorLine ? UIColor.clearColor : separatorColor;
//设置导航条标题颜色
appearance.titleTextAttributes = textAttributes;
bar.standardAppearance = appearance;
bar.scrollEdgeAppearance = appearance;
}
}
- (void)base_resetNaviBarStyle {
UIColor *separatorColor = UIColor.redColor;
NSDictionary *defaultTextAttributes = @{NSForegroundColorAttributeName: UIColor.blackColor};
UINavigationBar *bar = self.navigationController.navigationBar;
[bar setBackgroundImage:UIImage.new forBarMetrics:UIBarMetricsDefault];
UIImage *shadowImage = [UIImage imageWithColor:separatorColor];
bar.shadowImage = shadowImage;
bar.translucent = NO;
bar.titleTextAttributes = defaultTextAttributes;
if (@available(iOS 13.0, *)) {
UINavigationBarAppearance *appearance = UINavigationBarAppearance.new;
[appearance configureWithOpaqueBackground];
//设置导航栏背景色
appearance.backgroundColor = UIColor.whiteColor;
appearance.shadowColor = separatorColor;
//设置导航条标题颜色
appearance.titleTextAttributes = defaultTextAttributes;
bar.standardAppearance = appearance;
bar.scrollEdgeAppearance = appearance;
}
}
