IOS SDK details: Apps use Touch ID authentication, iossdk

IOS SDK details: Apps use Touch ID authentication, iossdk

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Blog.csdn.net/hello_hwc

Since iOS 8.0, Apple has enabled the App to use Touch ID for authentication. Note the following points:

• The App only proxies the authentication process to the iOS system and does not obtain the specific fingerprint information.
• Do not try to compare the fingerprint information with other databases. It is still impossible on the day I wrote it.

Used

Start verification

Verification Failed

Supported Devices

• IPhone 5S +
• IPad Air 2 +
• IPad Mini 3 +

How to Use
Framework used for Import

#import <LocalAuthentication/LocalAuthentication.h>

Initialize a LAContext

  LAContext * context = [[LAContext alloc] init];

Check whether the current device supports TouchID

NSError * error = nil;    if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {    ...｝

If yes, perform Touch ID authentication.

[Context evaluatePolicy: LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason: @ "To login in" reply: ^ (BOOL success, NSError * error) {if (success) {// success} else {// failure}];

There are several Error types returned for failure.

• LAErrorAuthenticationFailed-Fingerprint Authentication failed
• LAErrorUserCancel-the user cancels the authentication (for example, click cancel)
• LAErrorUserFallback-cancel a user (click "password)
• LAErrorSystemCancel-system canceled
• LAErrorPasscodeNotSet-no password set in the system
• LAErrorTouchIDNotAvailable-the device does not support TouchID
• LAErrorTouchIDNotEnrolled-Touch ID is not set (none for one fingerprint)