ios导航栏rightBarButtonItems多个按钮自定义设置

 UIButton *informationCardBtn = [UIButton buttonWithType:UIButtonTypeCustom];    [informationCardBtn addTarget:self action:@selector(enterehzFilesVC:) forControlEvents:UIControlEventTouchUpInside];    [informationCardBtn setImage:[UIImage imageNamed:@"nav_information"] forState:UIControlStateNormal];    [informationCardBtn sizeToFit];    UIBarButtonItem *informationCardItem = [[UIBarButtonItem alloc] initWithCustomView:informationCardBtn];            UIBarButtonItem *fixedSpaceBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];        fixedSpaceBarButtonItem.width = 22;            UIButton *settingBtn = [UIButton buttonWithType:UIButtonTypeCustom];    [settingBtn addTarget:self action:@selector(enterTeamCard:) forControlEvents:UIControlEventTouchUpInside];    [settingBtn setImage:[UIImage imageNamed:@"nav_settings"] forState:UIControlStateNormal];    [settingBtn sizeToFit];    UIBarButtonItem *settingBtnItem = [[UIBarButtonItem alloc] initWithCustomView:settingBtn];            self.navigationItem.rightBarButtonItems  = @[informationCardItem,fixedSpaceBarButtonItem,settingBtnItem];