IWComponent.h文件如下
#ifndef IWComponent_h
#define IWComponent_h
#import "IWNStringRegex.h"
#endif /* IWComponent_h */
IWNStringRegex.h文件如下
#import 
NS_ASSUME_NONNULL_BEGIN
@interface IWNStringRegex : NSObject
+ (BOOL)isValidEmail:(NSString *)email;
@end
NS_ASSUME_NONNULL_END
IWNStringRegex.m文件如下
#import "IWNStringRegex.h"
@implementation IWNStringRegex
+ (BOOL)isValidEmail:(NSString *)email
{
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:email];
}
@end

#import "IWViewController.h"
#import "IWComponent.h"
@interface IWViewController ()
@end
@implementation IWViewController
- (void)viewDidLoad
{
    [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
    
    NSString * email = @"fan@iw.com";
    BOOL isEmail = [IWNStringRegex isValidEmail:email];
    NSLog(@"是否是邮箱：%d", isEmail);
    
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

2021-08-10 20:50:29.628168+0800 component-test_Example[1448:25782] 是否是邮箱：1

#
# Be sure to run `pod lib lint component-test.podspec' to ensure this is a
# valid spec before submitting.
#
# Any lines starting with a # are optional, but their use is encouraged
# To learn more about a Podspec see https://guides.cocoapods.org/syntax/podspec.html
#
Pod::Spec.new do |s|
  s.name             = 'component-test'
  s.version          = '0.1.0'
  s.summary          = '组件的简介'
# This description is used to generate tags and improve search results.
#   * Think: What does it do? Why did you write it? What is the focus?
#   * Try to keep it short, snappy and to the point.
#   * Write the description between the DESC delimiters below.
#   * Finally, don't worry about the indent, CocoaPods strips it!
  s.description      = <<-DESC
  组件的详细描述
                       DESC
# s.homepage 作者主页地址
  s.homepage         = 'https://gitee.com/linyoumu'
  # s.screenshots     = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
  #license 开源协议
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
  # author 作者信息
  s.author           = { 'wangtaiju' => 'wang.taiju@iwhalecloud.com' }
  # source 组件地址，需要组件的git远程仓库地址一致
  s.source           = { :git => 'git@gitee.com:linyoumu/component-test.git', :tag => s.version.to_s }
  # s.social_media_url = 'https://twitter.com/'
  # ios.deployment_target 平台和运行最低系统
  s.ios.deployment_target = '10.0'
  # source_files 组件源代码路径
  s.source_files = 'component-test/Classes/**/*'
  
  # resource_bundles 组件所需资源路径，如图片
  # s.resource_bundles = {
  #   'component-test' => ['component-test/Assets/*.png']
  # }
  # public_header_files 对外公开的头文件
   s.public_header_files = 'Pod/Classes/IWComponent.h'
  # s.frameworks = 'UIKit', 'MapKit'
  # dependency 依赖的第三方库
  # s.dependency 'AFNetworking', '~> 2.3'
end

git add .
git commit -m "description"
git push origin master
git tag 版本号 （注：这里的版本号必须和 podspec 里写的版本号一致）
git push --tags

pod spec lint --verbose --allow-warnings --use-libraries

pod repo add gitee git@gitee.com:linyoumu/component-test.git

pod repo push gitee component-test.podspec --verbose --allow-warnings --use-libraries

pod 'component-test', :git => 'git@gitee.com:linyoumu/component-test.git', :tag => '0.1.0'