AppDelegate+Appearance

记录iOS15之后，nav 和 tabbar 等一些的全局设置

#import "AppDelegate+Appearance.h"
@implementation AppDelegate (Appearance)

- (BOOL)Appearance_application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self setupNav];
    [self setupTabBar];
    [self setupTableView];
    return YES;
}
/**
 nav
 */
-(void)setupNav{
    UINavigationBar *navigationBar      = [UINavigationBar appearance];
    [navigationBar setTranslucent:NO];
    navigationBar.tintColor             = [UIColor whiteColor];
    [navigationBar setBarStyle:UIBarStyleDefault];
    
    //隐藏Nav下边的线
    [navigationBar setShadowImage:[UIImage new]];
    [navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

    [navigationBar setBackIndicatorImage:IMG_BACK_Blue];
    [navigationBar setBackIndicatorTransitionMaskImage:IMG_BACK_Blue];
    
    [[UIBarButtonItem appearance] setTintColor:[UIColor blackColor]];
    
//    问题：导航栏问题比较明显，有的变白色，有的变黑色。
//    原因：UINavigationBar 部分属性的设置在 iOS15 上是无效的
    if (@available(iOS 13.0, *)) {
        UINavigationBarAppearance * appearance = [[UINavigationBarAppearance alloc] init];
        appearance.backgroundColor = [UIColor whiteColor];// 背景色
        appearance.shadowColor = [UIColor clearColor];// 去除导航栏阴影（如果不设置clear，导航栏底下会有一条阴影线）
        appearance.titleTextAttributes = @{NSForegroundColorAttributeName: [UIColor blackColor],
                                           NSFontAttributeName : [UIFont alyRegularFontWithFontSize:16]};// 字体颜色  字体
        [UINavigationBar appearance].scrollEdgeAppearance = appearance;// 带scroll滑动的页面
        [UINavigationBar appearance].standardAppearance = appearance;// 常规页面
    }
}

/**
 TabBar
 */
-(void)setupTabBar{
    if (@available(iOS 13.0, *)) {
        UITabBarAppearance *appearance = [UITabBarAppearance new];
        appearance.backgroundColor = [UIColor whiteColor];
        appearance.shadowColor = [UIColor clearColor]; // 去除tab 顶部黑线
        appearance.shadowImage = [UIImage new];
        [UITabBar appearance].standardAppearance = appearance;
        if (@available(iOS 15.0, *)) {//iOS15 适配
            [UITabBar appearance].scrollEdgeAppearance = appearance;
        }
    }
}

/**
 TableView
 */
-(void)setupTableView{
    if (@available(iOS 15.0, *)) {
        [UITableView appearance].sectionHeaderTopPadding = 0;
    }
}


@end

UINavigationController+ALYSetNavBar

设置navbar 透明 和 其他颜色。返回按钮图片

self.navigationBar.translucent = YES; // 透明
self.navigationBar.translucent = NO; // 不透明

/**
 改变nav 背景色 标题色 
 */
-(void)customNavBackColor:(UIColor *)color_bg titleColor:(UIColor *)color_t{
    if (@available(iOS 13.0, *)) {
        UINavigationBarAppearance * appearance = [[UINavigationBarAppearance alloc] init];
        appearance.backgroundColor = color_bg;// 背景色
        appearance.shadowColor = [UIColor clearColor];// 去除导航栏阴影（如果不设置clear，导航栏底下会有一条阴影线）
        appearance.titleTextAttributes = @{NSForegroundColorAttributeName: color_t,
                                           NSFontAttributeName : [UIFont alyRegularFontWithFontSize:16]};// 字体颜色  字体
        [UINavigationBar appearance].scrollEdgeAppearance = appearance;// 带scroll滑动的页面
        [UINavigationBar appearance].standardAppearance = appearance;// 常规页面
    }else{
        self.navigationController.navigationBar.barTintColor = color_bg;// 背景色
        self.navigationController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName: color_t,
                                                                        NSFontAttributeName : [UIFont alyRegularFontWithFontSize:16]};// 字体颜色  字体
    }
}
/**
 改变nav 背景色 标题色 返回按钮图片
 */
-(void)customNavBackColor:(UIColor *)color_bg titleColor:(UIColor *)color_t backBtnImg:(UIImage *)img{
    [self customNavBackColor:color_bg titleColor:color_t];
    self.navigationItem.leftBarButtonItem = [self addBackWithImg:img];
}