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];