MYZGestureView * gestureView = [[MYZGestureView alloc] init];
gestureView.gestureResult = ^(NSString * gestureCode){
  //得到手势密码 gestureCode 
};

MYZPasscodeView * passcodeView = [[MYZPasscodeView alloc] init];
passcodeView.PasscodeResult = ^(NSString * passcode){
   //得到数字密码passcode
};

#import <LocalAuthentication/LocalAuthentication.h>

//判断是否支持指纹识别
if ([UIDevice currentDevice].systemVersion.floatValue >= 8.0)
{
    //本地验证对象上下文
    LAContext *context = [LAContext new];

    //LAPolicyDeviceOwnerAuthenticationWithBiometrics: 允许使用
    if ([context canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:nil]){
        
        //localizedReason: 指纹识别出现时的提示文字
        [context evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics localizedReason:@"指纹识别, 开锁" reply:^(BOOL success, NSError * _Nullable error) {

            if (success) {
                //识别成功
                dispatch_async(dispatch_get_main_queue(), ^{ 
                    //...
                });
            }

            if (error) { }
        }];
    }
}