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@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:http://www.cnblogs.com/liuziyu/p/4181080.html