ios - NSPredicate that uses @max with an other condition in a fetch request -


i have coredata entity song has date property pushdate , boolean property ispublic.

i need fetch latest public song.

to latest, can use -

request.predicate = [nspredicate predicatewithformat:@"pushdate==max(pushdate)"];

but when try -

request.predicate = [nspredicate predicatewithformat:@"pushdate==max(pushdate) , ispublic == yes"];

i don't result (i 100% sure have songs public == yes).

can use predicate ? if no why / correct way ?

thanks

you can try fetch objects public first.

nspredicate *predicate = [nspredicate predicatewithformat:@"ispublic == yes"]; [request setpredicate:predicate];

use sort descriptor sort pushdate:

nssortdescriptor *sortdesc = [nssortdescriptor sortdescriptorwithkey:@"pushdate" ascending:no]; [request setsortdescriptors:@[sortdesc]];

set limit of request one:

[request setfetchlimit:1];

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