iOS8使用TouchID

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iOS8新增了LocalAuthentication架構，用於TouchID的授權使用。親測，眼下須要使用者的裝置支援指紋識別並已設定鎖屏，並且實際測試過程中反饋比較慢。不能直接跟第三方帳號password綁定，假設須要實現第三方應用直接指紋識別登入，須要在本機存放區帳號資訊，指紋識別通過之後再從本地讀取帳號資訊登入。總之。眼下的指紋識別是跟裝置、裝置鎖屏password綁定的。

測試代碼：

///使用TouchID-(void)usingTouchID{    LAContext *myContext = [[[LAContext alloc] init] autorelease];    NSError *authError = nil;    NSString *myLocalizedReasonString = @"用於指紋登入";    if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) {        [myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics                  localizedReason:myLocalizedReasonString                            reply:^(BOOL success, NSError *error) {                                if (success) {                                    // User authenticated successfully, take appropriate action                                    NSLog(@"成功");                                    UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Suceess" message:@"已通過指紋識別。" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil] autorelease];                                    [alertView show];                                } else {                                    // User did not authenticate successfully, look at error and take appropriate action                                    NSLog(@"fail with error:%@",error);                                    UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Failed" message:[error localizedDescription] delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil] autorelease];                                    [alertView show];                                }                            }];    } else {        // Could not evaluate policy; look at authError and present an appropriate message to user        NSLog(@"auth with error:%@",authError);        UIAlertView *alertView = [[[UIAlertView alloc] initWithTitle:@"Failed" message:[authError localizedDescription] delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil] autorelease];        [alertView show];    }}

iOS8使用TouchID