目前就能改leftBarButtonItem，rightBarButtonItem一样的颜色，
打开plist文件加入 View controller-based status bar appearance，将value改为no，在设置你想改的颜色
self.navigationController.navigationBar.tintColor = [UIColor grayColor];
如果想两边不一样颜色，只能自己写个
UIImageView
_rightView = [[UIImageView alloc]initWithFrame:CGRectMake(SCREEN_WIDTH - 60, 8, 30, 30)]; _rightView.userInteractionEnabled = YES; [self.navigationController.navigationBar insertSubview:_rightView atIndex:1];
必须加上这个方法
- (void)viewWillDisappear:(BOOL)animated
{
[_rightView removeFromSuperview];
}
原文：http://www.cnblogs.com/qianyindichang/p/4120882.html