iOS多个网络请求,刷新页面

Swift----------

let group = DispatchGroup()

group.enter()
BusinessClubVM.getBanner {[weak self] bannerModel in
     self?.headerV.bannerData = bannerModel
     group.leave()
} failed: {
     group.leave()
}

group.enter()
BusinessClubVM.getMenu {[weak self] bannerModel in
     self?.headerV.bannerData = bannerModel
     group.leave()
} failed: {
     group.leave()
}

group.notify(queue: DispatchQueue.main) {
    // 刷新页面操作
}

OC--------

dispatch_queue_t globalQueue = dispatch_get_global_queue(0, 0);
dispatch_group_t group = dispatch_group_create();

dispatch_group_enter(group);
[CloudForumViewModel getBannerDataWithCompletion:^(NSArray * _Nonnull array) {
        dispatch_group_leave(group);
}];

[CloudForumViewModel getAlertDataWithCompletion:^(NSDictionary * _Nonnull dic) {
        dispatch_group_leave(group);
}];      
 
dispatch_group_notify(group, globalQueue, ^{
        // 刷新页面操作
});