swift 指纹识别

func touAc(){

let laContext =
LAContext()
var error :
NSError?

let letview =
UIAlertView(title: "指纹验证", message:
"ok", delegate: nil, cancelButtonTitle:
"确认", otherButtonTitles:
"取消")
let errorReason =
"请输入指纹"

if laContext.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics,error:&error)
{

laContext.evaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics,
localizedReason: errorReason, reply: { (success, errore) -> Void
in

if success{

print("ok======!!!!!")

dispatch_async(dispatch_get_main_queue(), {

//需要主线程执行的代码
letview.show()
})

}

else{

print("\(errore)====ahahahhaha")
}

})

}

}