使用 Swift 识别英文数字验证码
- 环境准备
在开始之前,请确保你的项目中已经集成了以下库:
Alamofire(用于网络请求)
TesseractOCRiOS(用于 OCR 识别)
可以通过 CocoaPods 安装这些库,首先在你的 Podfile 中添加:
ruby
pod 'Alamofire', '~> 5.4'
pod 'TesseractOCRiOS', '~> 4.0.0'
然后运行 pod install。
- 下载验证码图片
使用 Alamofire 下载验证码图片并保存到本地:
swift
import Alamofire
class CaptchaDownloader {
static func downloadCaptcha(url: String, savePath: String, completion: @escaping (Bool) -> Void) {
AF.download(url).responseData { response in
switch response.result {
case .success(let data):
do {
try data.write(to: URL(fileURLWithPath: savePath))
print("验证码图片已保存为 (savePath)")
completion(true)
} catch {
print("保存图片失败: (error)")
completion(false)
}
case .failure(let error):
print("下载失败: (error)")
completion(false)
}
}
}
}
3. 图像处理与 OCR 识别
使用 TesseractOCR 进行 OCR 识别:
swift
import TesseractOCR
class CaptchaRecognizer {
static func recognizeCaptcha(imagePath: String) -> String? {
if let tesseract = G8Tesseract(language: "eng") {
tesseract.image = UIImage(contentsOfFile: imagePath)?.g8_blackAndWhite()
tesseract.recognize()
let result = tesseract.recognizedText?.trimmingCharacters(in: .whitespacesAndNewlines)
print("识别结果: (result ?? "")")
return result
}
return nil
}
}
4. 自动化登录
使用 Alamofire 发送 POST 请求,模拟登录操作:
swift
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class Login {
static func login(username: String, password: String, captcha: String) {
let url = "https://captcha7.scrape.center/login"
let parameters: [String: Any] = [
"username": username,
"password": password,
"captcha": captcha
]
AF.request(url, method: .post, parameters: parameters, encoding: JSONEncoding.default).responseJSON { response in
switch response.result {
case .success:
print("登录成功")
case .failure(let error):
print("登录失败: \(error)")
}
}
}
}
5. 主程序
整合上述代码,创建主程序:
swift
import Foundation
class Program {
static func run() {
let captchaUrl = "https://captcha7.scrape.center/captcha.png"
let captchaPath = "captcha.png"
// 下载验证码图片
CaptchaDownloader.downloadCaptcha(url: captchaUrl, savePath: captchaPath) { success in
if success {
// 识别验证码
if let captchaText = CaptchaRecognizer.recognizeCaptcha(imagePath: captchaPath) {
// 模拟登录
Login.login(username: "admin", password: "admin", captcha: captchaText)
}
}
}
}
}
// 启动程序
Program.run()