iOS 指纹或面部识别

Biometrics.swift

import LocalAuthentication

@objc func onClickPayBtn(_ sender: UIButton) {
        let context = LAContext()
        var error: NSError?
        let isEnable = context.canEvaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, error: &error)
        if isEnable == false {
            if let err = error {
                var message = ""
                switch err.code {
                    case LAError.appCancel.rawValue:
                        message = "Authentication was cancelled by application"
                    case LAError.authenticationFailed.rawValue:
                        message = "The user failed to provide valid credentials"
                    /// 多次验证失败
                    case LAError.invalidContext.rawValue:
                        message = "The context is invalid"
                    case LAError.passcodeNotSet.rawValue:
                        message = "Passcode is not set on the device"
                    case LAError.systemCancel.rawValue:
                        message = "Authentication was cancelled by the system"
                    case LAError.touchIDLockout.rawValue:
                        message = "Too many failed attempts."
                    /// 多次尝试失败
                    case LAError.touchIDNotAvailable.rawValue:
                        message = "TouchID is not available on the device"
                    case LAError.userCancel.rawValue:
                        message = "The user did cancel"
                    case LAError.userFallback.rawValue:
                        message = "The user chose to use the fallback"
                    /// 这里弹出输入密码页面
                    case LAError.touchIDNotEnrolled.rawValue:
                        message = "touchIDNotEnrolled"
                        /// 未设置指纹或
                    default:
                        message = "Did not find error code on LAError object"
                }
                print(message)
            }
        } else {
            print("支持生物识别")
        }
        if isEnable == true && error == nil {
            context.evaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, localizedReason: "请验证已有的指纹，用于支付") { (result, error) in
                if error == nil, result == true {
                    print("生物信息识别成功")
                } else {
                    if error != nil {
                        let err = error! as NSError
                        var message = ""
                        switch err.code {
                            case LAError.appCancel.rawValue:
                                message = "Authentication was cancelled by application"
                            case LAError.authenticationFailed.rawValue:
                                message = "The user failed to provide valid credentials"
                            /// 多次验证失败
                            case LAError.invalidContext.rawValue:
                                message = "The context is invalid"
                            case LAError.passcodeNotSet.rawValue:
                                message = "Passcode is not set on the device"
                            case LAError.systemCancel.rawValue:
                                message = "Authentication was cancelled by the system"
                            case LAError.touchIDLockout.rawValue:
                                message = "Too many failed attempts."
                            case LAError.touchIDNotAvailable.rawValue:
                                message = "TouchID is not available on the device"
                            case LAError.userCancel.rawValue:
                                message = "The user did cancel"
                            case LAError.userFallback.rawValue:
                                message = "The user chose to use the fallback"
                            /// 这里弹出输入密码页面
                            default:
                                message = "Did not find error code on LAError object"
                        }
                        print(message)
                    }
                }
            }
        }
    }