iOS多个请求数据同步

实现多请求数据同步需要用到线程通知

1.首先传建一个线程组

int __block i = 0;

NSMutableArray __block*arr = @[].mutableCopy;

dispatch_group_tgroup =dispatch_group_create();

2.进入线程组创建几条异步线程网络请求,并在请求成功突出线程组

dispatch_group_enter(group);

dispatch_group_async(group,dispatch_get_global_queue(0,0), ^{

//线程一

[BaseViewModelbaseRequestWithURLStr:Url1WithDic:nilBackData:^(NSDictionary*model,NSString*error) {

NSLog(@"model1");

[arr addObject:model];

i++;

dispatch_group_leave(group);

}];

});

dispatch_group_enter(group);

dispatch_group_async(group,dispatch_get_global_queue(0,0), ^{

//线程二

[BaseViewModelbaseRequestWithURLStr:Url2WithDic:nilBackData:^(NSDictionary*model,NSString*error) {

NSLog(@"model2");

[arr addObject:model];

i++;

dispatch_group_leave(group);

}];

});

3.当线程组任务都结束的时候回调用线程通知block

//汇总mode

dispatch_group_notify(group,dispatch_get_global_queue(0,0), ^{

NSLog(@"--%@<>%d--",arr,i);

}

});