- (void)loadHttpData {
dispatch_group_t group = dispatch_group_create();
dispatch_queue_t searialQueue = dispatch_queue_create("com.hmc.www", DISPATCH_QUEUE_SERIAL);
dispatch_group_enter(group);
dispatch_group_async(group, searialQueue, ^{
//网络请求1
//成功失败 离开组
dispatch_group_leave(group);
});
dispatch_group_enter(group);
dispatch_group_async(group, searialQueue, ^{
//网络请求2
//成功失败 离开组
dispatch_group_leave(group);
});
dispatch_group_enter(group);
dispatch_group_async(group, searialQueue, ^{
//网络请求3
//成功失败 离开组
dispatch_group_leave(group);
});
//三个网络请求结束，更新UI
dispatch_group_notify(group, searialQueue, ^{
dispatch_async(dispatch_get_global_queue(0, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
//更新UI
});
});
});
}
