NavigationItem.rightBarButtonItem设置

     startBtn = [[UIButton alloc]initWithFrame:CGRectMake(0,0,40,40)];
[startBtn setImage:[UIImage imageNamed:@"title_button_收藏"]forState:UIControlStateNormal];
[startBtn setImage:[UIImage imageNamed:@"title_button_收藏_light"]forState:UIControlStateSelected];
[startBtn addTarget:self action:@selector(star) forControlEvents:UIControlEventTouchUpInside];

UIButton *shareBtn = [[UIButton alloc]initWithFrame:CGRectMake(40,0,40,40)];
[shareBtn setImage:[UIImage imageNamed:@"icon_分享"]forState:UIControlStateNormal];
[shareBtn addTarget:self action:@selector(share) forControlEvents:UIControlEventTouchUpInside];

UIView *v = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 80, 40)];
v.backgroundColor = [UIColor clearColor];
[v addSubview:startBtn];
[v addSubview:shareBtn];

UIBarButtonItem *rightItem = [[UIBarButtonItem alloc]initWithCustomView:v];
self.navigationItem.rightBarButtonItem= rightItem;