XGPASS / XGTouchDemo

typedef NS_ENUM(NSInteger, LAError)
{
    LAErrorAuthenticationFailed,     // 验证信息出错，就是说你指纹不对
    LAErrorUserCancel               // 用户取消了验证
    LAErrorUserFallback             // 用户点击了手动输入密码的按钮，所以被取消了
    LAErrorSystemCancel             // 被系统取消，就是说你现在进入别的应用了，不在刚刚那个页面，所以没法验证
    LAErrorPasscodeNotSet           // 用户没有设置TouchID
    LAErrorTouchIDNotAvailable      // 用户设备不支持TouchID
    LAErrorTouchIDNotEnrolled       // 用户没有设置手指指纹
    LAErrorTouchIDLockout           // 用户错误次数太多，现在被锁住了
    LAErrorAppCancel                // 在验证中被其他app中断
    LAErrorInvalidContext           // 请求验证出错
} NS_ENUM_AVAILABLE(10_10, 8_0);

typedef NS_ENUM(NSInteger, LAPolicy)
{
    LAPolicyDeviceOwnerAuthenticationWithBiometrics NS_ENUM_AVAILABLE(NA, 8_0) __WATCHOS_AVAILABLE(3.0) __TVOS_AVAILABLE(10.0) = kLAPolicyDeviceOwnerAuthenticationWithBiometrics,
    LAPolicyDeviceOwnerAuthentication NS_ENUM_AVAILABLE(10_11, 9_0) = kLAPolicyDeviceOwnerAuthentication

} NS_ENUM_AVAILABLE(10_10, 8_0) __WATCHOS_AVAILABLE(3.0) __TVOS_AVAILABLE(10.0);

LAContext *context = [[LAContext alloc] init];
    context.localizedFallbackTitle = @"验证登录密码";
    // LAPolicyDeviceOwnerAuthentication
    __weak __typeof(self)weakSelf = self;
    [context evaluatePolicy:policy localizedReason:@"通过Home键验证已有手机指纹" reply:^(BOOL success, NSError * _Nullable error) {

        dispatch_async(dispatch_get_main_queue(), ^{
            NSString *message = @"";
            if (success) {
                message = @"通过了Touch ID 指纹验证";
                block(YES, NO, message);
            } else {
                //失败操作
                LAError errorCode = error.code;
                BOOL inputPassword = NO;
                switch (errorCode) {
                    case LAErrorAuthenticationFailed: {
                        // -1
                        [SVProgressHUD showErrorWithStatus:@"指纹不匹配"];
                        message = @"连续三次指纹识别错误";
                    }
                        break;

                    case LAErrorUserCancel: {
                        // -2
                        message = @"用户取消验证Touch ID";
                    }
                        break;

                    case LAErrorUserFallback: {
                        // -3
                        inputPassword = YES;
                        message = @"用户选择输入密码";
                    }
                        break;

                    case LAErrorSystemCancel: {
                        // -4 TouchID对话框被系统取消，例如按下Home或者电源键
                        message = @"取消授权，如其他应用切入";
                    }
                        break;

                    case LAErrorPasscodeNotSet: {
                        // -5
                        [SVProgressHUD showErrorWithStatus:@"此设备未设置系统密码"];
                        message = @"设备系统未设置密码";
                    }
                        break;

                    case LAErrorTouchIDNotAvailable: {
                        // -6
                        [SVProgressHUD showErrorWithStatus:@"此设备不支持 Touch ID"];
                        message = @"此设备不支持 Touch ID";
                    }
                        break;

                    case LAErrorTouchIDNotEnrolled: {
                        // -7
                        [SVProgressHUD showErrorWithStatus:@"用户未录入指纹"];
                        message = @"用户未录入指纹";
                    }
                        break;

                    case LAErrorTouchIDLockout: {
                        // -8 连续五次指纹识别错误，TouchID功能被锁定，下一次需要输入系统密码
                        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0) {
                            [weakSelf openTouchIDWithPolicy:LAPolicyDeviceOwnerAuthentication touchIDBlock:block];
                        }
                        message = @"Touch ID被锁，需要用户输入密码解锁";
                    }
                        break;

                    case LAErrorAppCancel: {
                        // -9 如突然来了电话，电话应用进入前台，APP被挂起啦
                        message = @"用户不能控制情况下APP被挂起";
                    }
                        break;

                    case LAErrorInvalidContext: {
                        // -10
                        message = @"Touch ID 失效";
                    }
                        break;

                    default:
                        // [SVProgressHUD showErrorWithStatus:@"此设备不支持 Touch ID"];
                        break;
                }

            }
        });
    }];