UIButton *cancelButton;      UIView *topView = self.searchDisplayController.searchBar.subviews[0];      for (UIView *subView in topView.subviews) {          if ([subView isKindOfClass:NSClassFromString(@"UINavigationButton")]) {              cancelButton = (UIButton*)subView;          }      }      if (cancelButton) {          //Set the new title of the cancel button          [cancelButton setTitle:@"取消" forState:UIControlStateNormal];          [cancelButton setTitleColor:[UIColor colorWithRed:53.f/255.f green:114.f/255.f blue:255.f/255.f alpha:1.0] forState:UIControlStateNormal];          cancelButton.titleLabel.font = [UIFont fontWithName:@"Heiti SC" size:15];      }