iOS 添加指纹识别功能

import LocalAuthentication

func onImageButtonTap(_ sender: UIButton) {
let authenticationContext = LAContext()
var error: NSError?

let isTouchIdAvailable = authenticationContext.canEvaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, error: &error)

if isTouchIdAvailable {
print("恭喜，Touch ID可以使用！")
//获取指纹验证结果

authenticationContext.evaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, localizedReason: "需要验证您的指纹来确认您的身份信息", reply: {
(success, error) -> Void in
if success {
print("恭喜，您通过了Touch ID指纹验证！")
} else {
print("抱歉，您未能通过Touch ID指纹验证！\n\(error)")
}
})
} else {
print("抱歉，Touch ID不可以使用！\n\(error)")
}
}