Question

我对iphone中处理内存管理的方式有问题。请帮助我..我的想法已经用完了...我试着用下面的方法玩，但是当我试图分配时它开始泄漏对象的字符串（例如为sid，first_name等分配）..我无法弄清楚如何做...这是我将从服务获取所有联系人并将其插入数据库的方法。它消耗了更多的内存，我通过在iphone上运行分配工具和iphone崩溃上的应用程序想出来了...请帮助我们..有什么更好的解决方案..我认为我的应用程序消耗更多内存但不确定在哪里调查它..如果不清楚，我可以发布任何代码。谢谢你们！

- (void) get_entry_listHandler: (id) value{

    NSString *salutation,*sugar_id,*first_name,*last_name,*title1,*department,*phone_home,*phone_mobile,*phone_work,*phone_other,*phone_fax,*assistant,*assistant_phone,*primary_address_street,*primary_address_city,*primary_address_state,*primary_address_postalcode,*custom;
    NSString *primary_address_country,*alt_address_street,*alt_address_city,*alt_address_state,*alt_address_postalcode,*alt_address_country,*date_entered,*date_modified,*deleted,*do_not_call,*birthdate,*lead_source,*description,*email1,*email2,*account_name,*account_id,*id1;

    // Handle errors
    if([value isKindOfClass:[NSError class]]) {
        NSLog(@"%@", value);
        return;
    }

    // Handle faults
    if([value isKindOfClass:[SoapFault class]]) {
        NSLog(@"%@", value);
        return;
    }               

    // Do something with the SCRMget_entry_list_result* result
    SCRMget_entry_list_result* result = (SCRMget_entry_list_result*)value;
    //NSLog(@"get_entry_list returned the value: %@", result);
    //NSLog(@"%@", result.entry_list);
    NSLog(@"%@", result.error);

    SCRMsugarsoap* service = [[SCRMsugarsoap alloc] initWithUrl:serverURL];
    SCRMentry_value* entry;
    for(NSString * myStr in result.entry_list) {
        entry = (SCRMentry_value*)myStr;
        //NSLog(@"1st %@",entry.name_value_list);
        //NSLog(@"1st %@",entry.id);
        //NSLog(@"1st %@",entry.module_name);

        for(NSString * myStr1 in entry.name_value_list) {

            SCRMname_value* value1 = (SCRMname_value*)myStr1;
            if ([value1.name isEqualToString:@"id"])
                sugar_id = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"salutation"])
                salutation = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"first_name"])
                first_name = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"last_name"])
                last_name = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"title"])
                title1 = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"department"])
                department = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"phone_home"])
                phone_home = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"phone_mobile"])
                phone_mobile = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"phone_work"])
                phone_work = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"phone_other"])
                phone_other = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"phone_fax"])
                phone_fax = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"assistant"])
                assistant = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"assistant_phone"])
                assistant_phone = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"primary_address_street"])
                primary_address_street = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"primary_address_city"])
                primary_address_city = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"primary_address_state"])
                primary_address_state = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"primary_address_postalcode"])
                primary_address_postalcode = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"primary_address_country"])
                primary_address_country = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"alt_address_street"])
                alt_address_street = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"alt_address_city"])
                alt_address_city = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"alt_address_state"])
                alt_address_state = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"alt_address_postalcode"])
                alt_address_postalcode = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"alt_address_country"])
                alt_address_country = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"date_entered"])
                date_entered = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"date_modified"])
                date_modified = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"deleted"])
                deleted = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"do_not_call"])
                do_not_call = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"birthdate"])
                birthdate = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"lead_source"])
                lead_source = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"description"])
                description = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"email1"])
                email1 = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"email2"])
                email2 = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else if ([value1.name isEqualToString:@"account_name"])
                account_name = [[NSString alloc] initWithFormat: @"%@",value1.value];


            else if ([value1.name isEqualToString:@"account_id"])
                account_id = [[NSString alloc] initWithFormat: @"%@",value1.value];
            else
                custom = [[NSString alloc] initWithFormat: @"%@",value1.value];
            }

        NSDateFormatter *df = [[NSDateFormatter alloc] init];
        [df setFormatterBehavior:NSDateFormatterBehavior10_4];
        [df setDateFormat:@"yyy-MM-dd HH:mm:ss"];
        NSDate *date_moded = [df dateFromString:date_modified];
        NSDate *lastSync = [df dateFromString:lastSyncTime];
        NSDate *date_enter = [df dateFromString:date_entered];
        [df release];

        if ([[date_moded laterDate:lastSync]isEqualToDate:date_moded] && lastSyncTime != nil && [date_enter isEqualToDate:date_moded])
            id1 = [[NSString alloc]initWithFormat:@"%d",primaryKeyCount];
        else if ([[date_moded laterDate:lastSync]isEqualToDate:date_moded] && lastSyncTime != nil )
            id1 = [db getPrimaryKey:sugar_id];
        else
            id1 = [[NSString alloc]initWithFormat:@"%d",primaryKeyCount];

        [db insertRecordIntoTableNamed: @"Contacts" withField1: @"id" field1Value: id1 andField2: @"sugar_id" field2Value: sugar_id 
                         andField3: @"salutation" field3Value: salutation andField4: @"first_name" field4Value: first_name 
                         andField5: @"last_name" field5Value: last_name andField6: @"title" field6Value: title1 
                         andField7: @"department" field7Value: department andField8: @"phone_home" field8Value: phone_home
                         andField9: @"phone_mobile" field9Value: phone_mobile andField10: @"phone_work" field10Value: phone_work 
                        andField11: @"phone_other" field11Value: phone_other andField12: @"phone_fax" field12Value: phone_fax
                        andField13: @"assistant" field13Value: assistant andField14: @"assistant_phone" field14Value: assistant_phone 
                        andField15: @"primary_address_street" field15Value: primary_address_street andField16: @"primary_address_city" field16Value: primary_address_city 
                        andField17: @"primary_address_state" field17Value: primary_address_state andField18: @"primary_address_postalcode" field18Value: primary_address_postalcode 
                        andField19: @"primary_address_country" field19Value: primary_address_country andField20: @"alt_address_street" field20Value: alt_address_street
                        andField21: @"alt_address_city" field21Value: alt_address_city andField22: @"alt_address_state" field22Value: alt_address_state
                        andField23: @"alt_address_postalcode" field23Value: alt_address_postalcode andField24: @"alt_address_country" field24Value: alt_address_country
                        andField25: @"date_entered" field25Value: date_entered andField26: @"date_modified" field26Value: date_modified 
                        andField27: @"deleted" field27Value: deleted andField28: @"do_not_call" field28Value: do_not_call 
                        andField29: @"birthdate" field29Value: birthdate andField30: @"lead_source" field30Value: lead_source 
                        andField31: @"description" field31Value: description andField32: @"email1" field32Value: email1
                        andField33: @"email2" field33Value: email2 andField34: @"account_name" field34Value: account_name 
                        andField35: @"account_id" field35Value: account_id andField36: @"custom" field36Value: custom];
        primaryKeyCount++;
        currentCount++;
        //NSLog(@"%D",i);
    }
    [salutation release];
    [sugar_id release];
    [first_name release];
    [last_name release];
    [title1 release];
    [department release];
    [phone_home release];
    [phone_mobile release];
    [phone_work release];
    [phone_fax release];
    [phone_other release];
    [assistant release];
    [assistant_phone release];
    [primary_address_street release];
    [primary_address_city release];
    [primary_address_state release];
    [primary_address_postalcode release];
    [primary_address_country release];
    [alt_address_street release];
    [alt_address_city release];
    [alt_address_state release];
    [alt_address_postalcode release];
    [alt_address_country release];
    [custom release];
    [date_entered release];
    [deleted release];
    [do_not_call release];
    [birthdate release];
    [lead_source release];
    [description release];
    [email1 release];
    [email2 release];
    [account_name release];
    [account_id release];

    float expected = (float) contactEntries;
    float gotSoFar = (float) currentCount;


    syncViewController.progressView.progress = ((float)((gotSoFar - 1) / (expected + 1)));
    syncViewController.progressLabel.text=[NSString stringWithFormat:@"Syncing %d Contacts",contactEntries]; 

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    integer = [NSNumber numberWithInt:primaryKeyCount];
    [defaults setObject:integer forKey:@"primaryKeyCount"];
    [defaults synchronize];

    moduleViewController.db = db;
    int a = result.next_offset;
    int b = contactEntries;
    while (result.result_count == 20 /*&& result.next_offset < contactEntries*/) {
        if ( lastSyncTime == nil) {
            [service get_entry_list:self action:@selector(get_entry_listHandler:) session:sessionId module_name: @"Contacts" query: @"" order_by: @"" offset: result.next_offset select_fields: [[[SCRMselect_fields alloc] init]autorelease] max_results: contactEntries deleted: 0];
            [service release];
            return;
            //break;
        }
        else {
            [service get_entry_list:self action:@selector(get_entry_listHandler:) session:sessionId module_name: @"Contacts" query: finalQuery order_by: @"" offset: result.next_offset select_fields: [[[SCRMselect_fields alloc] init]autorelease] max_results: contactEntries deleted: 0];
            [service release];
            return;
            //break;
        }
    }

    if (a >= b ) {
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [settingsViewController.navigationController pushViewController:moduleViewController animated:YES];
        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
        [defaults setBool:NO forKey:@"reset"];
        [defaults synchronize];
        [finalQuery release];
    }
    /*else if (a >= b && syncing == YES) {
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [moduleViewController reload];
    }*/

    [service release];
    [id1 release];

}

修改

我摆脱了所有泄漏，但任何人都可以告诉我如何检查iphone中的对象分配工具..请看下面的截图..我的应用程序崩溃一旦它加载所有4200个联系人和联系人是从未显示在表格视图上。可能是什么问题..我确保将我的联系人保存到数据库的地方是无泄漏的..在下面的屏幕截图中，我应该找到什么......是它总分配或生活..请让我知道伙计们......我已经筋疲力尽了......感谢你们的时间.. alt text

Answer 1

你应该把[string release]; for（NSString * myStr in result.entry_list）循环中的行。每次调用alloc时，都必须有相应的释放调用。

更好的方法是使用[NSString stringWithFormat：]而不是[[NSString alloc] initWithFormat：]，这样就不需要手动释放它们了。

我的应用一旦加载就崩溃了 4200个联系人和联系人从未显示在表格视图上，无论何时显示在表格视图
上

4200个联系人使你的循环“大而紧”。正如taskinoor所建议的那样，你可以为每一个循环创建和排出一个NSAutoreleasePool，以减少内存占用量。例如：

int counter = 0;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
for (...) {
    if (++counter == 100) {
        counter = 0;
        [pool release];
        pool = [[NSAutoreleasePool alloc] init];
    }
  //busy working...
}
[pool release];

如果响应系统事件需要很长时间，您的应用也可能被iOS终止。这种机制被称为看门狗超时。在这种情况下，您将在崩溃报告中找到异常代码0x8badf00d。您可能希望将工作分成更小的批次或使用辅助线程，以便主线程不会忙碌太长时间。

Answer 2

这是一个很长的代码，可能是我错了。但我的猜测就是这个。

for(NSString * myStr in result.entry_list) {
    // lots of alloc
}
// releases in this point

现在，如果你在result.entry_list中有多个条目（我猜你有），你不是在泄漏字符串吗？假设您在第一次传递中分配了str，而在下一次分配期间在第二次传递中分配了您正在泄漏这个。明白我的观点？

如果这是问题，那么你应该在循环中移动释放调用。

另一种解决方案是，您似乎不需要此范围之外的字符串。那么为什么不使用autorealse方法来创建呢？

str = [NSString stringWithFormat:@"what_you_need"];

您现在无需释放它们。虽然在这种情况下，您应该考虑创建自己的自动释放池，因为数据量可能很大。

iphone上的对象分配工具

2 个答案: