ios 指纹识别的一点笔记

/*

pragma mark 使用指纹解锁

-(void)userTouchId
{

NSLog(@"指纹解锁预备");
LAContext  *locontext= [[LAContext alloc] init];

locontext.localizedFallbackTitle= @"使用手势解锁密码";

NSError *err;
//3.判断设备是否支持指纹识别

if ([locontext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&err]) {
    //是否支持
    NSLog(@"指纹解锁判断");
    [locontext  evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"通过验证指纹解锁泰和网" reply:^(BOOL success, NSError * _Nullable error) {
        NSLog(@"开始指纹解锁");
        if (success) {
            NSLog(@"解锁成功");
            // 解锁成功 进入程序
            [self.tabBarController dismissViewControllerAnimated:YES completion:nil];
            [self.tabBarController showLaunchView];
        }else{
            NSLog(@"认证失败");
            /*switch (error.code) {
                case LAErrorUserCancel:
                {
                    NSLog(@"用户取消");
                     break;
                }
                case LAErrorAuthenticationFailed:
                {
                    NSLog(@"认证失败");
                    break;
                }
                case LAErrorPasscodeNotSet:
                {
                    NSLog(@"未设置密码");
                    break;
                }
                case LAErrorSystemCancel:
                {
                    NSLog(@"系统取消");
                    break;
                }
                case LAErrorUserFallback:
                {
                    NSLog(@"点击输入密码");
                    break;
                }
                default:
                    break;
            }*/
      /*  }
        
    }];
}else{
    NSLog(@"设备不支持指纹解锁 %@", err);
}

}*/