正则表达式在iOS中不起作用，在其他地方可以正常工作

我有一个正则表达式来解析CocoaPods pod文件中的pod名称；我写这篇文章是为了作为漏洞扫描的一部分

可以看出，这个正则表达式在RegexR中工作。但是，在

NSRegularExpression

中使用时，不会从同一输入返回匹配项

我以前知道

NSRegularExpression

有点挑剔，但这次我解决不了这个问题

正则表达式是：

---

/（？您不需要在Swift中使用/{pattern}/g语法

这对我来说在操场上很管用

import UIKit
import PlaygroundSupport

let podfileString = """
platform :ios, '11.0'

inhibit_all_warnings!
use_frameworks!
use_modular_headers!

def shared_pods
    pod 'CocoaLumberjack/Swift'
    pod 'PromiseKit'
    pod 'GZIP'
    pod 'Eureka' => '4.2.0', :configuration => 'Debug'
    pod 'RATreeView'
    pod 'LicensesViewController'
end

target 'DigiMe' do
    pod 'Masonry'
    pod 'Instabug'
    pod 'SAMKeychain'
    pod 'Mixpanel'
    pod 'SDWebImage'
    pod 'FLAnimatedImage'
    pod 'SnapKit', '~> 4.0.0'
    pod 'ObjectMapper'
    pod 'SwiftLint'
    pod 'MarqueeLabel/Swift'
    pod 'Alamofire'
    pod 'PromiseKit/Alamofire'
    pod 'UIColor_Hex_Swift'
    pod 'SwiftyJSON'
    pod 'Hero'
    pod 'GPUImage'
    shared_pods
end

target 'DigiMeTests' do

    ####### SPECTA ######
    pod 'Specta',       '~> 1.0'
    pod 'Expecta',      '~> 1.0'   # expecta matchers
    pod 'OHHTTPStubs/Swift'
    #####################

    shared_pods
end

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            preprocessor_definitions = config.build_settings['GCC_PREPROCESSOR_DEFINITIONS']
            preprocessor_definitions = ['$(inherited)'] if preprocessor_definitions == nil
            preprocessor_definitions.push 'MIXPANEL_NO_IFA' if target.to_s.include? 'Mixpanel'
            config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] = preprocessor_definitions
            config.build_settings['CLANG_ENABLE_CODE_COVERAGE'] = 'NO'
        end
    end
end
"""

let range = NSRange(location: 0, length: podfileString.utf16.count)
let regex = try! NSRegularExpression(pattern: "(?<=pod ')[A-Za-z/]+(?=')")
let matches = regex.matches(in: podfileString, options: [], range: range)
let matchStrings = matches.map({ (podfileString as NSString).substring(with: $0.range) })
print(matchStrings)

导入UIKit
导入PlaygroundSupport
让podfileString=“”
平台：ios，“11.0”
禁止所有警告！
使用你的框架！
使用模块化标题！
def共享_吊舱
吊舱“CocoaLumberjack/Swift”
pod“PromiseKit”
吊舱'GZIP'
pod'Eureka'=>'4.2.0'，：配置=>'Debug'
吊舱“RATreeView”
pod“许可证查看控制器”
终止
目标是“数字时间”吗
吊舱“砖石”
“Instabug”吊舱
吊舱“SAMKeychain”
pod“混合面板”
吊舱“SDWebImage”
吊舱“FLAnimatedImage”
吊舱“SnapKit”，“~>4.0.0”
pod“ObjectMapper”
“迅捷林”吊舱
吊舱“MarqueeLabel/Swift”
阿拉莫菲尔吊舱
pod“PromiseKit/Alamofire”
吊舱“UIColor\U Hex\U Swift”
吊舱“迅捷JSON”
吊舱“英雄”
吊舱“GPUImage”
共享豆荚
终止
目标“DigiMeTests”do
#######斯佩克塔######
吊舱“Specta”，“~>1.0”
pod'Expecta'，'~>1.0'#Expecta匹配器
吊舱“OHHTTPStubs/Swift”
#####################
共享豆荚
终止
安装后的do安装程序|
installer.pods_project.targets.each do| target|
target.build|u configurations.each do| config|
预处理器\u定义=config.build\u设置['GCC\u预处理器\u定义']
如果预处理器_定义==nil，则预处理器_定义=['$（继承）']
预处理器\u definitions.push'MIXPANEL\u NO\u IFA'如果target.to\u.s.include？'MIXPANEL'
config.build\u设置['GCC\u预处理器\u定义]]=预处理器\u定义
config.build\u设置['CLANG\u ENABLE\u CODE\u COVERAGE']=“否”
终止
终止
终止
"""
let range=NSRange（位置：0，长度：podfileString.utf16.count）
让regex=try！NSRegularExpression（模式：（？
pattern:（？感谢您提供有关iOS中标志的提示。实现上述代码解决了这个问题，不过，为了结束起见，我不应该认为是正则表达式不如我传入的范围那么有效。请注意，我使用的是
NSRangeFromString
，这个答案使用字符串的UTF-16视图创建了一个范围。These显然返回不同的值。我很惊讶UTF-16是必需的，尽管我认为标准是UTF-8。另外，对于多行字符串+1，我以前没有见过。谢谢，是的，utf16显然对特殊字符和表情符号有帮助（我不是这方面的专家，只是在这方面有所了解），很高兴能帮上忙
import UIKit
import PlaygroundSupport

let podfileString = """
platform :ios, '11.0'

inhibit_all_warnings!
use_frameworks!
use_modular_headers!

def shared_pods
    pod 'CocoaLumberjack/Swift'
    pod 'PromiseKit'
    pod 'GZIP'
    pod 'Eureka' => '4.2.0', :configuration => 'Debug'
    pod 'RATreeView'
    pod 'LicensesViewController'
end

target 'DigiMe' do
    pod 'Masonry'
    pod 'Instabug'
    pod 'SAMKeychain'
    pod 'Mixpanel'
    pod 'SDWebImage'
    pod 'FLAnimatedImage'
    pod 'SnapKit', '~> 4.0.0'
    pod 'ObjectMapper'
    pod 'SwiftLint'
    pod 'MarqueeLabel/Swift'
    pod 'Alamofire'
    pod 'PromiseKit/Alamofire'
    pod 'UIColor_Hex_Swift'
    pod 'SwiftyJSON'
    pod 'Hero'
    pod 'GPUImage'
    shared_pods
end

target 'DigiMeTests' do

    ####### SPECTA ######
    pod 'Specta',       '~> 1.0'
    pod 'Expecta',      '~> 1.0'   # expecta matchers
    pod 'OHHTTPStubs/Swift'
    #####################

    shared_pods
end

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            preprocessor_definitions = config.build_settings['GCC_PREPROCESSOR_DEFINITIONS']
            preprocessor_definitions = ['$(inherited)'] if preprocessor_definitions == nil
            preprocessor_definitions.push 'MIXPANEL_NO_IFA' if target.to_s.include? 'Mixpanel'
            config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] = preprocessor_definitions
            config.build_settings['CLANG_ENABLE_CODE_COVERAGE'] = 'NO'
        end
    end
end
"""

let range = NSRange(location: 0, length: podfileString.utf16.count)
let regex = try! NSRegularExpression(pattern: "(?<=pod ')[A-Za-z/]+(?=')")
let matches = regex.matches(in: podfileString, options: [], range: range)
let matchStrings = matches.map({ (podfileString as NSString).substring(with: $0.range) })
print(matchStrings)