Question

How to use a boolean property in objective C class, i did it like:

@property (nonatomic, copy) BOOL *locationUseBool;

but it gives error that:

Property with ‘copy’ attribute must be of object type.

what is the correct way of declaring?

Answer 1

You can declare this way also.

@property (assign) BOOL locationUseBool;

Basically, if you say nonatomic, and you generate the accessors using @synthesize, then if multiple threads try to change/read the property at once, badness can happen. You can get partially-written values or over-released/retained objects

In a multi-threaded program, an atomic operation cannot be interrupted partially through, whereas nonatomic operations can.