#import "FingerprintUnlockController.h" #import <LocalAuthentication/LocalAuthentication.h> @interface FingerprintUnlockController () @end @implementation FingerprintUnlockController - (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor whiteColor]; [self authenticateUser]; } // 指纹验证的实现 - (void)authenticateUser { //初始化上下文对象 LAContext* context = [[LAContext alloc] init]; //错误对象 NSError* error = nil; NSString* result = @"Authentication is needed to access your notes."; //首先使用canEvaluatePolicy 判断设备支持状态 if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) { //支持指纹验证 [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:result reply:^(BOOL success, NSError *error) { if (success) { //验证成功,主线程处理UI } else { NSLog(@"%@",error.localizedDescription); switch (error.code) { case LAErrorSystemCancel: { NSLog(@"Authentication was cancelled by the system"); //切换到其他APP,系统取消验证Touch ID break; } case LAErrorUserCancel: { NSLog(@"Authentication was cancelled by the user"); //用户取消验证Touch ID break; } case LAErrorUserFallback: { NSLog(@"User selected to enter custom password"); [[NSOperationQueue mainQueue] addOperationWithBlock:^{ //用户选择其他验证方式,切换主线程处理 }]; break; } default: { [[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(@"TouchID is not enrolled"); break; } case LAErrorPasscodeNotSet: { NSLog(@"A passcode has not been set"); break; } default: { NSLog(@"TouchID not available"); break; } } NSLog(@"%@",error.localizedDescription); // [self showPasswordAlert]; } } // 对几种情况的说明 //typedef NS_ENUM(NSInteger, LAError) //{ // //授权失败 // LAErrorAuthenticationFailed = kLAErrorAuthenticationFailed, // // //用户取消Touch ID授权 // LAErrorUserCancel = kLAErrorUserCancel, // // //用户选择输入密码 // LAErrorUserFallback = kLAErrorUserFallback, // // //系统取消授权(例如其他APP切入) // LAErrorSystemCancel = kLAErrorSystemCancel, // // //系统未设置密码 // LAErrorPasscodeNotSet = kLAErrorPasscodeNotSet, // // //设备Touch ID不可用,例如未打开 // // LAErrorTouchIDNotAvailable = kLAErrorTouchIDNotAvailable, // // //设备Touch ID不可用,用户未录入 // LAErrorTouchIDNotEnrolled = kLAErrorTouchIDNotEnrolled, //} NS_ENUM_AVAILABLE(10_10, 8_0); @end