1、模態(tài)跳轉(zhuǎn)方式：presentViewController

問題如下圖：

解決：跳轉(zhuǎn)前，添加入下一句代碼即可

vc.modalPresentationStyle = UIModalPresentationFullScreen;

別添加錯位置了，是即將跳轉(zhuǎn)的頁面添加，不是self

例如：

IndicationViewController *vc = [[IndicationViewController alloc] init];
vc.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentViewController:vc animated:YES completion:nil];

runtime優(yōu)化presentViewController方式跳轉(zhuǎn)：

1、把如下代碼拷貝到項目之中即可全局解決，跳轉(zhuǎn)使用之前樣式
2、如果某個controller想使用新樣式，則
vc.wg_setModalPresentationStyle = NO;

.h
#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface UIViewController (WGPresent)

// 某個控制器想用系統(tǒng)默認(rèn),則設(shè)置NO
@property (nonatomic, assign) BOOL wg_setModalPresentationStyle;

@end

NS_ASSUME_NONNULL_END

.m
#import "UIViewController+WGPresent.h"
#import <objc/runtime.h>

@implementation UIViewController (WGPresent)

+(void)load {
    
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        
        SEL oldSel = @selector(presentViewController:animated:completion:);
        SEL newSel = @selector(wg_presentViewController:animated:completion:);
        
        Method old = class_getInstanceMethod([self class], oldSel);
        Method new = class_getInstanceMethod([self class], newSel);
        if (class_addMethod([self class], oldSel, method_getImplementation(new), method_getTypeEncoding(new))) {
            
            class_replaceMethod([self class], newSel, method_getImplementation(old), method_getTypeEncoding(old));
        }else {
            
            method_exchangeImplementations(old, new);
        }
    });
}

- (void)wg_presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion {
    
    if (@available(iOS 13.0, *)) {
        
        if (viewControllerToPresent.wg_setModalPresentationStyle) {
            
            viewControllerToPresent.modalPresentationStyle = UIModalPresentationFullScreen;
        }
    }
    [self wg_presentViewController:viewControllerToPresent animated:flag completion:completion];
}

- (BOOL)wg_setModalPresentationStyle {
    
    NSNumber *obj = objc_getAssociatedObject(self, @selector(wg_setModalPresentationStyle));
    return obj ? [obj boolValue] : [self.class wg_GlobalSetModalPresentationStyle];
}

-(void)setWg_setModalPresentationStyle:(BOOL)wg_setModalPresentationStyle {
    
    objc_setAssociatedObject(self, @selector(wg_setModalPresentationStyle), @(wg_setModalPresentationStyle), OBJC_ASSOCIATION_ASSIGN);
}

//以后迭代版本,想全部用系統(tǒng)之前樣式(排除UIImagePickerController,UIAlertController)
+ (BOOL)wg_GlobalSetModalPresentationStyle {
    
    if ([self isKindOfClass:[UIImagePickerController class]] || [self isKindOfClass:[UIAlertController class]]) {
        
        return NO;
    }
    return YES;
}

@end

2、全局關(guān)閉暗黑模式

1、在Info.plist 文件中，添加UIUserInterfaceStyle key 名字為 User Interface Style 值為String。
2、將UIUserInterfaceStyle key 的值設(shè)置為 Light

3、單個界面不遵循暗黑模式

UIViewController與UIView 都新增一個屬性 overrideUserInterfaceStyle，將 overrideUserInterfaceStyle 設(shè)置為對應(yīng)的模式，則強制限制該元素與其子元素以設(shè)置的模式進行展示，不跟隨系統(tǒng)模式改變進行改變

4、通過 KVC來修改一些沒有暴露出來的屬性，崩潰

[self.importCertificateNumTextFiled setValue:kGrayColor forKeyPath:@"_placeholderLabel.textColor"];

修改為

if (@available(iOS 13.0, *)) {
    self.importCertificateNumTextFiled.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"請輸入" attributes:@{NSForegroundColorAttributeName : kGrayColor}];
}else{
    [self.importCertificateNumTextFiled setValue:kGrayColor forKeyPath:@"_placeholderLabel.textColor"];
}

5、適配Dark Mode

6、UITabBar title選中顏色被還原，出現(xiàn)問題

在設(shè)置UITabBar的地方添加如下代碼

 [[UITabBar appearance] setUnselectedItemTintColor: UIColor.grayColor];

例如我的代碼：

- (UINavigationController *)viewController:(UIViewController *)vc title:(NSString *)title nomalImg:(NSString *)imgStr tag:(NSInteger)tag{
    
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
    UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:title image:[UIImage imageNamed:imgStr] tag:tag];
    item.selectedImage = [UIImage imageNamed:[NSString stringWithFormat:@"%@%@",imgStr,@"s"]];
    [item setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:UIColor.redColor, NSForegroundColorAttributeName, nil] forState:UIControlStateSelected];
    [[UITabBar appearance] setUnselectedItemTintColor:UIColor.grayColor];
    
    vc.tabBarItem = item;
    return nav;
}

參考：
iOS13 暗黑模式(Dark Mode)適配之OC版
iOS 13 問題解決以及蘋果登錄,暗黑模式
iOS13 DarkMode適配（一）