iOS项目添加指纹解锁

#import <LocalAuthentication/LocalAuthentication.h>

 1 //验证指纹解锁是否可用
 2 - (void)canEvaluatePolicy
 3 {
 4     LAContext *context = [[LAContext alloc] init];
 5     NSError *error;
 6     BOOL success;
 7     
 8     // test if we can evaluate the policy, this test will tell us if Touch ID is available and enrolled
 9     success = [context canEvaluatePolicy: LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error];
10     if (success) {
11         NSLog(@"指纹解锁可用");
12         [self evaluatePolicy];
13     } else {
14         NSLog(@"此设备指纹解锁不可用");
15     }
16 }
17 
18 //指纹验证
19 - (void)evaluatePolicy
20 {
21     LAContext *context = [[LAContext alloc] init];
22     
23     // show the authentication UI with our reason string
24     [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"通过home键验证已有手机指纹" reply:
25      ^(BOOL success, NSError *authenticationError) {
26          if (success) {
27              NSLog(@"success");
28          } else {
29              NSLog(@"failure : %@ ",authenticationError.localizedDescription);
30          }
31      }];
32 }