[Solved] objective-c – using a boolean value from one class in another class

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be careful with the “global definition”.
if your class must save the user settings, you can use:
for save:

 NSUserDefaults *pref = [NSUserDefaults standardUserDefaults];
 [pref setBool:YES forKey:@"AudioIsON"];
 [pref synchronize];

for reading:

BOOL myBooleanSetting = [[NSUserDefaults standardUserDefaults] boolForKey:@"AudioIsON"];

instead of, is better to learn the delegate and the property.

hope this help you.

solved objective-c – using a boolean value from one class in another class