iOS中指纹识别常见问题汇总

//
// LAPublicDefines.h
// LocalAuthentication
//
// Copyright (c) 2014 Apple. All rights reserved.
//
#ifndef LocalAuthentication_LAPublicDefines_h
#define LocalAuthentication_LAPublicDefines_h
// Policies
#define kLAPolicyDeviceOwnerAuthenticationWithBiometrics 1
#define kLAPolicyDeviceOwnerAuthentication 2
// Options
#define kLAOptionUserFallback 1
#define kLAOptionAuthenticationReason 2
// Credential types
#define kLACredentialTypePasscode -1
#define kLACredentialTypePassphrase -2
#define kLACredentialCTKPIN -3
// Error codes
#define kLAErrorAuthenticationFailed -1
#define kLAErrorUserCancel -2
#define kLAErrorUserFallback -3
#define kLAErrorSystemCancel -4
#define kLAErrorPasscodeNotSet -5
#define kLAErrorTouchIDNotAvailable -6
#define kLAErrorTouchIDNotEnrolled -7
#define kLAErrorTouchIDLockout -8
#define kLAErrorAppCancel -9
#define kLAErrorInvalidContext -10
// Error domain
#define kLAErrorDomain "com.apple.LocalAuthentication"
#endif

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);

- (BOOL)canEvaluatePolicy:(LAPolicy)policy error:(NSError * __autoreleasing *)error __attribute__((swift_error(none)));
- (void)evaluatePolicy:(LAPolicy)policy
localizedReason:(NSString *)localizedReason
reply:(void(^)(BOOL success, NSError * __nullable error))reply;
- (void)invalidate;

// 目前额外加密就一种就是应用密码
// 输入进去将会是 UTF-8 的字符串
typedef NS_ENUM(NSInteger, LACredentialType)
{
LACredentialTypeApplicationPassword = 0,
} NS_ENUM_AVAILABLE(10_11, 9_0);
// 以下方法据我理解应该是：可以在验证Touch ID之后额外加密?
// 设置解锁额外加密凭证
- (BOOL)setCredential:(nullable NSData *)credential
type:(LACredentialType)type NS_AVAILABLE(10_11, 9_0);
// 判断加密凭证是否设置成功
- (BOOL)isCredentialSet:(LACredentialType)type NS_AVAILABLE(10_11, 9_0);
// 通过Touch ID来验证加密凭证是否通过
- (void)evaluateAccessControl:(SecAccessControlRef)accessControl
operation:(LAAccessControlOperation)operation
localizedReason:(NSString *)localizedReason
reply:(void(^)(BOOL success, NSError * __nullable error))reply
NS_AVAILABLE(10_11, 9_0);
typedef NS_ENUM(NSInteger, LAAccessControlOperation)
{
// 创建额外加密
LAAccessControlOperationCreateItem,
// 使用额外加密
LAAccessControlOperationUseItem,
// 创建额外加密key
LAAccessControlOperationCreateKey,
// 使用额外加密key签名
LAAccessControlOperationUseKeySign
} NS_ENUM_AVAILABLE(10_11, 9_0);

@property (nonatomic, nullable, copy) NSString *localizedFallbackTitle;
@property (nonatomic, nullable, copy) NSString *localizedCancelTitle NS_AVAILABLE(10_12, 10_0);
@property (nonatomic, nullable) NSNumber *maxBiometryFailures NS_DEPRECATED_IOS(8_3, 9_0) __WATCHOS_UNAVAILABLE __TVOS_UNAVAILABLE;
@property (nonatomic, nullable, readonly) NSData *evaluatedPolicyDomainState NS_AVAILABLE(10_11, 9_0) __WATCHOS_UNAVAILABLE __TVOS_UNAVAILABLE;
@property (nonatomic) NSTimeInterval touchIDAuthenticationAllowableReuseDuration NS_AVAILABLE(NA, 9_0) __WATCHOS_UNAVAILABLE __TVOS_UNAVAILABLE;

[SVProgressHUD show];
LAContext *context = [[LAContext alloc]init];//使用 new 不会给一些属性初始化赋值
context.localizedFallbackTitle = @"";//这样可以不让 feedBack 按钮显示
//LAPolicyDeviceOwnerAuthenticationWithBiometrics
[context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"请验证已有指纹" reply:^(BOOL success, NSError * _Nullable error) {
[SVProgressHUD dismiss];
//SVProgressHUD dismiss 需要 0.15才会消失;所以dismiss 后进行下一步操作;但是0.3是适当延长时间;留点余量
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3* NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
if (success)
{
NSLog(@"指纹识别成功");
// 指纹识别成功，回主线程更新UI
dispatch_async(dispatch_get_main_queue(), ^{
//成功操作
});
}
if (error) {
//指纹识别失败，回主线程更新UI
NSLog(@"指纹识别成功");
dispatch_async(dispatch_get_main_queue(), ^{
//失败操作
});
}
});
}];

- (void)applicationWillResignActive:(UIApplication *)application;
- (void)applicationDidBecomeActive:(UIApplication *)application;