Valentin Shamardin Valentin Shamardin - 1 month ago 222
Objective-C Question

NSUserDefaults errors in logs

I get some error messages in logs

[User Defaults] Failed to write value for key GameId in CFPrefsPlistSource<0x1740faf00> (Domain: xxx.xxxxxx, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null)): Path not accessible, switching to read-only
[User Defaults] attempt to set <private> for key in <private> in read-only (due to a previous failed write) preferences domain CFPrefsPlistSource<0x1740faf00> (Domain: xxx.xxxxxx, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null))


What does cause this?

That's how I use
NSUserDefaults
:

- (NSString *)gameId
{
if (_gameId)
return _gameId;

_gameId = [[NSUserDefaults standardUserDefaults] objectForKey:@"GameId"];
return _gameId;
}

- (void)setGameId:(NSString *)aGameId
{
_gameId = aGameId;
[[NSUserDefaults standardUserDefaults] setObject:_gameId forKey:@"GameId"];
[[NSUserDefaults standardUserDefaults] synchronize];
}

Answer

Lot of people are finding this issue on Xcode 8.

"As crazy as it sounds try rebooting phone and host, sometimes Xcode can get stuck for sum reason only restart helps.

build with Xcode 8.1 Beta and you will see the same warning, but you will also get the value. "

reference : https://forums.developer.apple.com/thread/51348