我刚刚开始试用 CloudKit,并且查询时间很慢。这是我正在使用的一些示例代码:
//CLOUDKIT
CKContainer *container = [CKContainer defaultContainer];
CKDatabase *privateDatabase = [container privateCloudDatabase];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"TRUEPREDICATE"];
CKQuery *query = [[CKQuery alloc] initWithRecordType:@"FlightLog" predicate:predicate];
[privateDatabase performQuery:query inZoneWithID:nil completionHandler:^(NSArray *results, NSError *error) {
//SUCCESS
if (!error)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"SUCCESS" message:@"IT WORKED" delegate:self cancelButtonTitle:@"dismiss" otherButtonTitles:nil];
[alert show];
NSLog(@"%@", @"fetchFlights success!");
NSLog(@"%@", self.fetchedRecords);
self.fetchedRecords = results;
[self.tableView reloadData];
}
//ERROR
else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"error" message:error.localizedDescription delegate:self cancelButtonTitle:@"dismiss" otherButtonTitles:nil];
[alert show];
NSLog(@"%@", error);
}
}];
我得到私人数据库,并查询所有记录。我在仪表板中添加了四个简单的。
调用此代码后,我可以从控制台日志中看到成功消息几乎立即被调用,结果数组为空。片刻之后,返回结果,如日志中所示。但是,警报视图未显示,结果在我的表中显示大约 3-4 秒。
这是怎么回事?