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  • autoreleasepool

    @autoreleasepool{}

    ARC模式下:

    1.[p autorelease]; 只会将p放入pool中,不会立即release(即 retain - 1),延迟至pool销毁时。

    2.在pool销毁时,其中的所有对象都将进行release。

    3.若开辟多线程时(如:[self performSelectorInBackground:@selector(setupLocalContactsData:) withObject:success]),

       要在setupLocalContactsData:中加入autoreleasepool进行内存管理。

    EX:

      if (version < 6.0) {
                _addressBookRef = ABAddressBookCreate();
                [self performSelectorInBackground:@selector(setupLocalContactsData:) withObject:success];//新建后台线程执行
             
            }

    - (void)setupLocalContactsData:(void (^)(NSArray *localContacts))success
    {
        @autoreleasepool { //对新线程做内存管理
            
            NSMutableDictionary *pinyinDictionary = nil;
            NSMutableArray *resultArray = [NSMutableArray array];
            
            CFArrayRef allPeopleArrayRef = ABAddressBookCopyArrayOfAllPeopleInSourceWithSortOrdering(_addressBookRef, nil, kABPersonSortByLastName);

        }

    }

     
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  • 原文地址:https://www.cnblogs.com/liuziyu/p/4181080.html
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