How do I get a GKPlayer's status from Game Center?

问题

When I get a GKLocalPlayer or use loadPlayersForIdentifiers:identifiers withCompletionHandler: to get a list or individual GKPlayer aliases, the GKPlayer object when logged, looks something like this:

2010-09-23 10:39:01.759 Cee-lo[76500:207] Players loaded by identity: (
    "<GKPlayer 0x84125a0>(playerID: G:1234567890, alias: typeonetester1, status: Adding test friends., rid:(null))",
    "<GKPlayer 0x8412530>(playerID: G:1234567890, alias: typeonetester2, status: Adding Game Center to app, rid:(null))"
)

My question is, how do I get the status from this object, and what exactly is the type of this object? There is no "rid" or "status" property in the GKPlayer class, so when I do something like:

GKPlayer *player = [self.friends objectAtIndex:row];

cell.nameLabel.text = player.alias;
cell.statusLabel.text = player.status;

I get a "Request for member 'status' in something not a structure or union" error.

回答1:

Answered by an Apple engineer:

The players' status is not an accessible property. This was changed in one of the 4.1 betas & is noted in the 4.1 relnotes.

回答2:

NSString *desc = player.description;
NSRange range = [desc rangeOfString:@"status:"];
NSString *status = [[desc substringFromIndex:NSMaxRange(range)] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

来源：https://stackoverflow.com/questions/3781195/how-do-i-get-a-gkplayers-status-from-game-center