IOS SDK app with Touch ID authentication

Original blog, reproduced please indicate the source
Blog.csdn.net/hello_hwc

After iOS 8.0, Apple has opened an app that uses Touch ID to authenticate. But there are a few things to note:

• The app simply proxies the authentication process to the iOS system and does not get specific information about the fingerprint.
• Do not try to compare the fingerprint information with other databases, it is impossible for me to write this day.

Used by

Start validation

Validation failed

Supported devices

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

How to use
Framework used by 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]) {    ...｝

Touch ID Authentication if supported

[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"To login in" reply:^(BOOLNSError *error) {            if (success) {                //成功            }else{                   //失败            }}];   

Of these, there are several types of error that failed to return

• Laerrorauthenticationfailed-fingerprint authentication failed
• Laerrorusercancel-User cancels authentication (e.g. click Cancel)
• Laerroruserfallback-User Cancel (click input password)
• Laerrorsystemcancel-System Cancel
• Laerrorpasscodenotset-System does not have a password set
• Laerrortouchidnotavailable-Device does not support TouchID
• Laerrortouchidnotenrolled-touch ID not set (one fingerprint not)

IOS SDK app with Touch ID authentication