ios - NSUserDefault not able to retrieve value double -


i'm creating simple double value, saving nsuserdefault , trying recover it...but doesn't.

- (ibaction)try:(id)sender {      double value = 42.00;      nsuserdefaults *defaults = [nsuserdefaults standarduserdefaults];     [defaults setdouble:value forkey:@"kdoublekey"];    // nslog(@"loading %f",mydouble); }    -(void)viewwillappear:(bool)animated {     [super viewwillappear:animated];       nsuserdefaults *fetchdefaults = [nsuserdefaults standarduserdefaults];     double intvalue = [fetchdefaults doubleforkey:@"kdoublekey"];     nslog(@"douvle reteive %f",intvalue); }

do not forget synchronise whenever save defaults: put @ end of try method

[[nsuserdefaults standarduserdefaults]synchronize];

here apple says this: because method automatically invoked @ periodic intervals, use method if cannot wait automatic synchronization (for example, if application exit) or if want update user defaults on disk though have not made changes.


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