业务需求：一个页面加载2次请求，保证两次请求完成后，在页面加载数据。
参考：主要参考方法
_group = dispatch_group_create();
_semaphore = dispatch_semaphore_create(0);
dispatch_queue_t queue=dispatch_queue_create(NULL, DISPATCH_QUEUE_SERIAL);
for(intj=0; j<2; j++) {
dispatch_group_async(_group, queue, ^{
if(j==0){
[_KYNetgetmanuGateways:@(1):@(1000):[NSNumbernumberWithLong:coor.latitude]:[NSNumbernumberWithLong:coor.longitude]];
}else{
NSDictionary *param = @{@"pageIdx":@(1), @"limit":@(1000),@"sensorType":@(-1),@"status":@(-1),@"areaIDJSONArray":@"[\"aaa\"]"};
[_KYNetgetSuperSNList:param :nil];
}
// dispatch_semaphore_wait(_semaphore, DISPATCH_TIME_FOREVER);
});
}
dispatch_group_notify(_group, queue, ^{
dispatch_semaphore_wait(_semaphore, DISPATCH_TIME_FOREVER);
dispatch_semaphore_wait(_semaphore, DISPATCH_TIME_FOREVER);
//所有请求返回数据后执行
dispatch_async(dispatch_get_main_queue(), ^{
[self refresh];
});
});
注意： 是为了在主线程进行数据加载
dispatch_async(dispatch_get_main_queue(), ^{
[self refresh];
});
