//內連，使用情況較多下使用，

 

static inline NSString * GetUUIDString()

{

CFUUIDRef uuidObj = CFUUIDCreate(nil);

NSString *uuidString = (__bridge_transfer NSString*)CFUUIDCreateString(nil, uuidObj);

CFRelease(uuidObj);

return uuidString;

}

 

//類方法，建議新建NSString的分類使用，

 

+ (NSString*) getUUIDString

{

CFUUIDRef uuidObj = CFUUIDCreate(nil);

NSString *uuidString = (__bridge_transfer NSString*)CFUUIDCreateString(nil, uuidObj);

CFRelease(uuidObj);

return uuidString;

}