ios 有没有办法在iOS模拟器上使用苹果的Touch ID（指纹扫描仪）？
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Is there any way to use apple's Touch ID (fingerprint scanner) on iOS Simulator?
提问by Ashish
I am working on an app which would require Touch ID Authentication, so is there any way i can use Touch ID (fingerprint scanner) in the simulator ?
我正在开发一个需要 Touch ID 身份验证的应用程序，那么有什么方法可以在模拟器中使用 Touch ID（指纹扫描仪）吗？
Also, please do share some kind of example code for using LocalAuthentication framework.
另外，请分享一些使用 LocalAuthentication 框架的示例代码。
采纳答案by Woodstock
As of Xcode 7 the Simulator supports 'touchID'. Answer below contains further info.
从 Xcode 7 开始，模拟器支持“touchID”。下面的答案包含更多信息。
As of the latest beta (6) there is no way to simulate a fingerprint scan on the simulator. To be honest I doubt this will be included even in later betas.
从最新的测试版 (6) 开始，无法在模拟器上模拟指纹扫描。老实说，我怀疑即使在以后的测试版中也会包含它。
You will need to test on device.
您需要在设备上进行测试。
To use the Authentication framework right now you need: * XCode 6 * iPhone 5s with iOS 8
要立即使用身份验证框架，您需要： * XCode 6 * iPhone 5s with iOS 8
The steps you need to perform are:
您需要执行的步骤是：
Find out whether the device supports fingerprint validation and whether a fingerprint is enrolled:
查看设备是否支持指纹验证以及是否注册了指纹：
@import LocalAuthentication;
// Get the local authentication context:
LAContext *context = [[LAContext alloc] init];
// Test if fingerprint authentication is available on the device and a fingerprint has been enrolled.
if ([context canEvaluatePolicy: LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil])
{
NSLog(@"Fingerprint authentication available.");
}
Validate a fingerprint only:
仅验证指纹：
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"Authenticate for server login" reply:^(BOOL success, NSError *authenticationError){
if (success) {
NSLog(@"Fingerprint validated.");
}
else {
NSLog(@"Fingerprint validation failed: %@.", authenticationError.localizedDescription);
}
}];
Validate a fingerprint or the device's passcode depending on the user's choice:This is a little beyond the scope of a question here, please find more information at: https://www.secsign.com/fingerprint-validation-as-an-alternative-to-passcodes/
根据用户的选择验证指纹或设备的密码：这有点超出此处问题的范围，请在以下位置找到更多信息：https: //www.secsign.com/fingerprint-validation-as-an-alternative -到密码/
回答by karthik
XCODE 7 beta supports testing the Touch ID Authentication in iPhone Simulator.You can try this for your testing.
XCODE 7 beta 支持在 iPhone 模拟器中测试 Touch ID 身份验证。你可以试试这个来进行测试。
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回答by Nischal Hada
In Objective c
在目标 c
@import LocalAuthentication;
@interface EnterPasscodeVC ()
-(void)viewWillAppear:(BOOL)animated {
LAContext *myContext = [[LAContext alloc] init];
NSError *authError = nil;
NSString *myLocalizedReasonString = @"Authentication is required to access your QPay Apps.";
if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) {
[myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
localizedReason:myLocalizedReasonString
reply:^(BOOL success, NSError *error) {
if (success) {
dispatch_async(dispatch_get_main_queue(), ^{
[self performSegueWithIdentifier:@"Success" sender:nil];
});
} else {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:error.description
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[alertView show];
switch (error.code) {
case LAErrorAuthenticationFailed:
NSLog(@"Authentication Failed");
// Rather than show a UIAlert here, use the error to determine if you should push to a keypad for PIN entry.
break;
case LAErrorUserCancel:
NSLog(@"User pressed Cancel button");
break;
case LAErrorUserFallback:
NSLog(@"User pressed \"Enter Password\"");
break;
default:
NSLog(@"Touch ID is not configured");
break;
}
NSLog(@"Authentication Fails");
});
}
}];
} else {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:authError.description
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[alertView show];
// Rather than show a UIAlert here, use the error to determine if you should push to a keypad for PIN entry.
});
}
}
In Swift
在斯威夫特
import LocalAuthentication
override func viewDidLoad() {
super.viewDidLoad()
authenticateUser()
}
// MARK: Method implementation
func authenticateUser() {
// Get the local authentication context.
let context = LAContext()
// Declare a NSError variable.
var error: NSError?
// Set the reason string that will appear on the authentication alert.
let reasonString = "Authentication is needed to access your notes."
// Check if the device can evaluate the policy.
if context.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &error) {
[context .evaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, localizedReason: reasonString, reply: { (success: Bool, evalPolicyError: NSError?) -> Void in
if success {
// If authentication was successful then load the data.
NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
self.loadData()
})
}
else{
// If authentication failed then show a message to the console with a short description.
// In case that the error is a user fallback, then show the password alert view.
print(evalPolicyError?.localizedDescription)
switch evalPolicyError!.code {
case LAError.SystemCancel.rawValue:
print("Authentication was cancelled by the system")
case LAError.UserCancel.rawValue:
print("Authentication was cancelled by the user")
case LAError.UserFallback.rawValue:
print("User selected to enter custom password")
NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
self.showPasswordAlert()
})
default:
print("Authentication failed")
NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
self.showPasswordAlert()
})
}
}
})]
}
else{
// If the security policy cannot be evaluated then show a short message depending on the error.
switch error!.code{
case LAError.TouchIDNotEnrolled.rawValue:
print("TouchID is not enrolled")
case LAError.PasscodeNotSet.rawValue:
print("A passcode has not been set")
default:
// The LAError.TouchIDNotAvailable case.
print("TouchID not available")
}
// Optionally the error description can be displayed on the console.
print(error?.localizedDescription)
// Show the custom alert view to allow users to enter the password.
showPasswordAlert()
}
}
func showPasswordAlert() {
let passwordAlert : UIAlertView = UIAlertView(title: "TouchIDDemo", message: "Please type your password", delegate: self, cancelButtonTitle: "Cancel", otherButtonTitles: "Okay")
passwordAlert.alertViewStyle = UIAlertViewStyle.SecureTextInput
passwordAlert.show()
}
func loadData(){
if appDelegate.checkIfDataFileExists() {
self.dataArray = NSMutableArray(contentsOfFile: appDelegate.getPathOfDataFile())
self.tblNotes.reloadData()
}
else{
print("File does not exist")
}
}
// MARK: UIAlertViewDelegate method implementation
func alertView(alertView: UIAlertView!, clickedButtonAtIndex buttonIndex: Int) {
if buttonIndex == 1 {
if !alertView.textFieldAtIndex(0)!.text!.isEmpty {
if alertView.textFieldAtIndex(0)!.text == "appcoda" {
loadData()
}
else{
showPasswordAlert()
}
}
else{
showPasswordAlert()
}
}
}
