Potential leak of an object stored into 'string' [duplicate]

Answer 1

Your bridged cast does not transfer the ownership, thus the retain count is increased. Use __bridge_transfer instead.

Answer 2

For iOS 6 and later use:

NSString *guid = [[NSUUID new] UUIDString];
NSLog(@"guid '%@'", guid);

NSLog output:

guid 'C2635D23-557B-42C9-BE90-6E6001CC09F1'

Answer 3

Try this:

+(NSString *)GUID
{
    CFUUIDRef theUUID = CFUUIDCreate(NULL);
    CFStringRef string = CFUUIDCreateString(NULL, theUUID);
    CFRelease(theUUID);
    NSString *str = (__bridge NSString *)string;
    CFRelease(string);
    return str;
}