iOS指纹验证TouchID应用学习教程

#import "AppDelegate.h"
#import "ViewController.h"
@interface AppDelegate ()

@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 //appdelegate
 _window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
 _window.backgroundColor = [UIColor whiteColor];
 [_window makeKeyAndVisible];
 ViewController *vc = [[ViewController alloc]init];
 UINavigationController *na = [[UINavigationController alloc]initWithRootViewController:vc];
 _window.rootViewController = na;
 return YES;
}

 -canEvaluatePolicy:error: 
//-(BOOL)canEvaluatePolicy:(LAPolicy)policy error:(NSError * __autoreleasing *)error __attribute__((swift_error(none)));

 -evaluatePolicy:localizedReason:reply: 
//- (void)evaluatePolicy:(LAPolicy)policy localizedReason:(NSString *)localizedReason reply:(void(^)(BOOL success, NSError * __nullable error))reply;

- (void)viewDidLoad {
 [super viewDidLoad];
 self.title = @"TouchIDSimpleDemoOne";
 LAContext *context = [[LAContext alloc]init];
 NSError *error;
 NSString *result = @"需要你身份验证呢"; 
 if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error])
 {
 [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:result reply:^(BOOL success, NSError *error)
 {
 if (success)
 {
 //验证成功，主线程处理UI
 //这个地方呢就是写一些验证成功之后需要做些什么事情的代码。
 NSLog(@"验证成功");
 }
 else
 {
 //以下是一些验证失败的原因啥的
 NSLog(@"%@",error.localizedDescription);
 switch (error.code) {
  case LAErrorSystemCancel:
  {
  NSLog(@"切换到其他APP，系统取消验证Touch ID");
  //切换到其他APP，系统取消验证Touch ID
  break;
  }
  case LAErrorUserCancel:
  {
  NSLog(@"用户取消验证Touch ID");
  //用户取消验证Touch ID
  break;
  }
  case LAErrorUserFallback:
  {
  NSLog(@"用户选择输入密码");
  [[NSOperationQueue mainQueue] addOperationWithBlock:^{
  //用户选择其他验证方式，切换主线程处理
  }];
  break;
  }
  default:
  {
  NSLog(@"LAErrorAuthenticationFailed，授权失败");
  //授权失败
  [[NSOperationQueue mainQueue] addOperationWithBlock:^{
  //其他情况，切换主线程处理
  }];
  break;
  }
 }
 }
 }]; 
 }else
 {
 //不支持指纹识别，LOG出错误详情

 switch (error.code) {
 case LAErrorTouchIDNotEnrolled:
 {
 NSLog(@"设备Touch ID不可用，用户未录入");
 break;
 }
 case LAErrorPasscodeNotSet:
 {
 NSLog(@"系统未设置密码");
 break;
 }
 case LAErrorTouchIDNotAvailable:
 {
 NSLog(@"设备Touch ID不可用，例如未打开");
 break;
 }
 default:
 {
 NSLog(@"系统未设置密码");
 break;
 }
 }
 NSLog(@"%@",error.localizedDescription);
 } 
}

//指纹验证返回值
typedef NS_ENUM(NSInteger, LAError)
{
 /// Authentication was not successful, because user failed to provide valid credentials.
 LAErrorAuthenticationFailed = kLAErrorAuthenticationFailed,

 /// Authentication was canceled by user (e.g. tapped Cancel button).
 LAErrorUserCancel = kLAErrorUserCancel,

 /// Authentication was canceled, because the user tapped the fallback button (Enter Password).
 LAErrorUserFallback = kLAErrorUserFallback,

 /// Authentication was canceled by system (e.g. another application went to foreground).
 LAErrorSystemCancel = kLAErrorSystemCancel,

 /// Authentication could not start, because passcode is not set on the device.
 LAErrorPasscodeNotSet = kLAErrorPasscodeNotSet,

 /// Authentication could not start, because Touch ID is not available on the device.
 LAErrorTouchIDNotAvailable = kLAErrorTouchIDNotAvailable,

 /// Authentication could not start, because Touch ID has no enrolled fingers.
 LAErrorTouchIDNotEnrolled = kLAErrorTouchIDNotEnrolled,

 /// Authentication was not successful, because there were too many failed Touch ID attempts and
 /// Touch ID is now locked. Passcode is required to unlock Touch ID, e.g. evaluating
 /// LAPolicyDeviceOwnerAuthenticationWithBiometrics will ask for passcode as a prerequisite.
 LAErrorTouchIDLockout NS_ENUM_AVAILABLE(10_11, 9_0) = kLAErrorTouchIDLockout,

 /// Authentication was canceled by application (e.g. invalidate was called while
 /// authentication was in progress).
 LAErrorAppCancel NS_ENUM_AVAILABLE(10_11, 9_0) = kLAErrorAppCancel,

 /// LAContext passed to this call has been previously invalidated.
 LAErrorInvalidContext NS_ENUM_AVAILABLE(10_11, 9_0) = kLAErrorInvalidContext
} NS_ENUM_AVAILABLE(10_10, 8_0);

- (void)viewDidLoad {
 [super viewDidLoad];
 //初始化
 WJTouchID *touchid = [[WJTouchID alloc]init];
 [touchid startWJTouchIDWithMessage:WJNotice(@"自定义信息", @"The Custom Message") fallbackTitle:WJNotice(@"", @"Fallback Title") delegate:self];
 self.touchID = touchid;
}

@required

 //TouchID验证成功
- (void)WJTouchIDAuthorizeSuccess;

 //TouchID验证失败
- (void)WJTouchIDAuthorizeFailure;

@optional

 //当前设备不支持指纹识别
- (void)WJTouchIDIsNotSupport;

 //当前软件被挂起取消了授权(如突然来了电话,应用进入前台)
- (void)WJTouchIDAuthorizeErrorAppCancel;

 //取消TouchID验证 (用户点击了取消)
- (void)WJTouchIDAuthorizeErrorUserCancel;

 //在TouchID对话框中点击输入密码按钮
- (void)WJTouchIDAuthorizeErrorUserFallback;

 //在验证的TouchID的过程中被系统取消 例如突然来电话、按了Home键、锁屏...
- (void)WJTouchIDAuthorizeErrorSystemCancel;

 //无法启用TouchID,设备没有设置密码
- (void)WJTouchIDAuthorizeErrorPasscodeNotSet;

 //多次连续使用Touch ID失败，Touch ID被锁，需要用户输入密码解锁
- (void)WJTouchIDAuthorizeErrorTouchIDLockout;

 //当前软件被挂起取消了授权 (授权过程中,LAContext对象被释)
- (void)WJTouchIDAuthorizeErrorInvalidContext;

 //设备没有录入TouchID,无法启用TouchID
- (void)WJTouchIDAuthorizeErrorTouchIDNotEnrolled;

 //该设备的TouchID无效
- (void)WJTouchIDAuthorizeErrorTouchIDNotAvailable;