多个异步网络请求，刷新UI
/// 创建信号量
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
// 创建全局并行 dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group, queue, ^{
[[NetAPIManager sharedManager] request_getNewsCountWithCompanyId:self.company.uid andBlock:^(id data, NSError *error) {
if (!error) {
newsCount = [data integerValue];
self.news = [NSString stringWithFormat:@"资讯 %zd", newsCount];
}
dispatch_semaphore_signal(semaphore);
请求成功 发信号
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
// 进入等待
});
dispatch_group_async(group, queue, ^{
[[NetAPIManager sharedManager] request_getDrugsCountWithCompanyId:self.company.uid andBlock:^(id data, NSError *error) {
if (!error) {
drugsCount = [data integerValue];
self.self.drugs = [NSString stringWithFormat:@"招商 %zd", drugsCount];
}
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
});
dispatch_group_async(group, queue, ^{
[[NetAPIManager sharedManager] request_getTalentsCountWithCompanyId:self.company.uid andBlock:^(id data, NSError *error) {
if (!error) {
talentsCount = [data integerValue];
self.talents = [NSString stringWithFormat:@"资讯 %zd", talentsCount];
}
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
});
dispatch_group_async(group, queue, ^{
[[NetAPIManager sharedManager] request_getCommentsCountWithCompanyId:self.company.uid andBlock:^(id data, NSError *error) {
if (!error) {
commentsCount = [data integerValue];
self.comments = [NSString stringWithFormat:@"留言 %zd", commentsCount];
}
dispatch_semaphore_signal(semaphore);
}];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
});
// __weak typeof(self) weakSelf = self;
dispatch_group_notify(group, queue, ^{
主线程刷新UI
dispatch_async(dispatch_get_main_queue(), ^{
self.list = @[@"简介", self.news, self.drugs,self.talents ,self.comments];
[self changeTitle];
});
//更新UI操作
NSLog(@"______+++++%@", self.list);
});
