??????????????????

????3.???????????

????1 // ???????????????
????2 - (UIStatusBarStyle)preferredStatusBarStyle{
????3     return UIStatusBarStyleLightContent;
????4 }
????5 // ???????????????
????6 - (UIStatusBarStyle)preferredStatusBarStyle{
????7     return UIStatusBarStyleDefault;
????8 }
????9 // ?????????????
????10 - (BOOL)prefersStatusBarHidden{
????11
????12     return YES;
????13 }

????UIStatusBarStyle??????????UIStatusBarStyleLightContent??UIStatusBarStyleDefault??????????????
????4.?ж?????????????????????“==”?????isEqualToString:
????[options isEqualToString:question.answer] ???ж?????????????????
????5.??дdescription??????????????????
????6.??????????
????[self.view bringSubviewToFront:self.pictureView]
????7.???????????
????[self.answerView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
????8.??????????????
????option.hidden = YES;
????9.????????title
????NSString *temp = [btn titleForState:UIControlStateNormal];