iphone - 创建地址簿副本

Question

我想把所有的iPhone通讯录联系人复制到一个数组中，然后把这个数组写入一个文件。我已经编写了以下代码并将其连接到一个按钮，但是当我点击这个按钮时我的应用程序崩溃了。

请帮我解决这个问题。

我的方法:

-(NSString *)pathOfFile{
    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *documentsDirectory=[paths objectAtIndex:0];
    return [documentsDirectory stringByAppendingFormat:@"contacts.plist"];
}


-(IBAction)createAddressBookCopy{

    ABAddressBookRef addressBook = ABAddressBookCreate();

    CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);
    CFIndex nPeople = ABAddressBookGetPersonCount(addressBook);

    NSMutableArray *masterList = [[NSMutableArray alloc] init];
    for (int i = 0; i < nPeople; i++) {
        ABRecordRef ref = CFArrayGetValueAtIndex(allPeople, i);
        CFStringRef fName = ABRecordCopyValue(ref, kABPersonFirstNameProperty);
        CFStringRef lName = ABRecordCopyValue(ref, kABPersonLastNameProperty);
        NSString *contactFirstLast = [NSString stringWithFormat: @"%@", (NSString *)fName];

        CFRelease(fName);
        CFRelease(lName);
        [masterList addObject:contactFirstLast];
        [contactFirstLast release];
    }

    //self.list = masterList;
    [masterList writeToFile:[self pathOfFile] atomically:YES];

    [masterList release]; 

}  

**这里我只保存了名字；

Answer 1

查看您的代码:

NSString *contactFirstLast = [NSString stringWithFormat: @"%@", (NSString *)fName];
// ....
contactFirstLast release];  // this is wrong

当您创建 contactFirstLast 时，您并不拥有它，而是在释放它。这就是您的应用程序崩溃的原因。