简介

本篇讲的是如何实现指纹识别以及密码验证识别。

开始

导入 module

import LocalAuthentication

指纹 / 密码验证识别的具体实现，如下：

let context = LAContext()
context.localizedFallbackTitle = "Verify gesture password"

let localizedReason = "Test auth"

var error: NSError? = nil
// 判断是否支持指纹/密码验证识别
if context.canEvaluatePolicy(.deviceOwnerAuthentication, error: &error) {
    print("Support authentication")
    
    // 请求验证
    context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: localizedReason, reply: {
        (success, error) in
        
        if success {
            if nil != context.evaluatedPolicyDomainState {
                // 指纹验证成功
                print("TouchID success")
            } else {
                // 密码验证成功
                print("Input password success")
            }
        } else {
            // 验证失败
            print("Error = \(String(describing: error))")
            
            if let error = error as? LAError {
                switch error.code {
                case LAError.userCancel:
                    print("Error result: userCancel")
                case LAError.appCancel:
                    print("Error result: appCancel")
                case LAError.authenticationFailed:
                    print("Error result: authenticationFailed")
                case LAError.biometryLockout:
                    print("Error result: biometryLockout")
                case LAError.biometryNotAvailable:
                    print("Error result: biometryNotAvailable")
                case LAError.biometryNotEnrolled:
                    print("Error result: biometryNotEnrolled")
                case LAError.passcodeNotSet:
                    print("Error result: passcodeNotSet")
                case LAError.systemCancel:
                    print("Error result: systemCancel")
                case LAError.userFallback:
                    print("Error result: userFallback")
                default:
                    break
                }
            }
        }
    })
    
} else {
    // 不支持指纹/密码验证识别
    print("Do not support authentication")
}

效果如下