【LocalAuthentication】iOS8 指纹识别

初始化 iOS 8

 // 初始化 指纹识别 实例
    LAContext *context = [LAContext new];

 // 指纹错误 额外的提示按钮，对应下面的 kLAErrorUserFallback；为空时不显示
    context.localizedFallbackTitle = @"";

 // 检测是否有指纹识别
 [context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]
 typedef NS_ENUM(NSInteger, LAPolicy) {
     LAPolicyDeviceOwnerAuthenticationWithBiometrics NS_ENUM_AVAILABLE(NA, 8_0) = kLAPolicyDeviceOwnerAuthenticationWithBiometrics,
     LAPolicyDeviceOwnerAuthentication NS_ENUM_AVAILABLE(10_11, 9_0) = kLAPolicyDeviceOwnerAuthentication
 };

 // 指纹识别 识别回调
    [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
            localizedReason:NSLocalizedString(@"使用指纹识别，进入下一步", nil)
                      reply:^(BOOL success, NSError *error) {
                          if (success) {
                              // 跳转
                          } else {
                              // 错误 error.code = ?
                          }
                      }];

 // iOS 8
 LAErrorAuthenticationFailed 身份验证失败 - 大于系统允许次数失败时
 LAErrorUserCancel 用户取消
 LAErrorUserFallback 用户失败后新增的按钮回调
 LAErrorSystemCancel 系统取消，切换到系统外
 LAErrorPasscodeNotSet 指纹ID未设置
 LAErrorTouchIDNotAvailable 指纹ID不可用
 LAErrorTouchIDNotEnrolled 指纹ID未登记

 // iOS 9 
 LAErrorTouchIDLockout 指纹ID已锁
 LAErrorAppCancel app取消
 LAErrorInvalidContext 超时?

iOS9

涉及到 SecAccessControlRef 的安全库内容，暂无研究唉。

extern const NSTimeInterval LATouchIDAuthenticationMaximumAllowableReuseDuration NS_AVAILABLE_IOS(9_0);

- (void)invalidate NS_AVAILABLE(10_11, 9_0);

typedef NS_ENUM(NSInteger, LAAccessControlOperation) {
    LAAccessControlOperationCreateItem,
    LAAccessControlOperationUseItem,
    LAAccessControlOperationCreateKey,
    LAAccessControlOperationUseKeySign
} NS_ENUM_AVAILABLE(10_11, 9_0);

- (void)evaluateAccessControl:(SecAccessControlRef)accessControl
                    operation:(LAAccessControlOperation)operation
              localizedReason:(NSString *)localizedReason
                        reply:(void(^)(BOOL success, NSError * __nullable error))reply
                        NS_AVAILABLE(10_11, 9_0);

@property (nonatomic, nullable, readonly) NSData *evaluatedPolicyDomainState NS_AVAILABLE(10_11, 9_0);

@property (nonatomic) NSTimeInterval touchIDAuthenticationAllowableReuseDuration NS_AVAILABLE_IOS(9_0);

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