Objective C apps can indeed make use of biometric authentication features like Touch ID or Face ID. These biometric authentication options have become increasingly popular due to their convenience and security.
Enabling Touch ID
To enable Touch ID in your Objective C app, you need to import the LocalAuthentication
framework and use the LAContext
class.
Here’s a step-by-step guide:
- Import the
LocalAuthentication
framework: - Create an instance of
LAContext
class: - Check if Touch ID is available on the device:
- Authenticate with Touch ID:
#import <LocalAuthentication>
LAContext *context = [[LAContext alloc] init];
NSError *error = nil;BOOL canUseTouchID = [context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error];if (canUseTouchID) { // Touch ID is available} else { // Touch ID is not available}
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"Use Touch ID to authenticate" reply:^(BOOL success, NSError *error) { if (success) { // Authentication succeeded } else { // Authentication failed }}];
Implementing Face ID
If you want to support Face ID in your Objective C app, you can follow a similar process. Import the LocalAuthentication
framework, create an instance of LAContext
class, and check for Face ID availability using canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
. Then, use evaluatePolicy:localizedReason:reply:
to authenticate with Face ID.
By integrating Touch ID or Face ID into your Objective C app, you provide users with a seamless and secure way to authenticate within your app and access their personal information.