Question

我关注此论坛：https://parse.com/questions/using-pfquerytableviewcontroller-for-uitableview-sections

如果您转到上面的链接并阅读标题，您会看到我正在尝试在PFQueryTableViewController中创建部分。从上面的链接复制代码后，我能够对我的TableView进行切割就好了......它非常棒！这是我的问题。（这样做的最好方法是举个例子）。想象一下，我有3节细胞，每节有2个细胞

一个乙

Ç d

电子 ˚F

当我点击A时，我得到一个结果。当我点击B时，我得到B结果。但是当我点击C时我得到A，当我点击D时我得到B. 当我点击E时，我得到A，当我点击F时，我得到B。

基本上它知道有部分，但它正好像有1个部分不断重复（3）次。

这是捕获。 TableView中的单元格显示正确的信息。在您单击单元格后，它传输了错误的信息。也许我错过了一些东西，但我不知道在哪里。

这是我的代码：

@property (nonatomic, retain) NSMutableDictionary *sections;
@property (nonatomic, retain) NSMutableDictionary *sectionToSportTypeMap;

@implementation AllDataViewController
@synthesize sections = _sections;
@synthesize sectionToSportTypeMap = _sectionToSportTypeMap;

- (id)initWithCoder:(NSCoder *)aCoder
{
    self = [super initWithCoder:aCoder];
    if (self) {
        // Custom the table

        // The className to query on
        self.parseClassName = @"schedule";
        self.textKey = @"name";
        self.pullToRefreshEnabled = YES;

        self.paginationEnabled = YES;
        self.objectsPerPage = 25;
        self.sections = [NSMutableDictionary dictionary];
        self.sectionToSportTypeMap = [NSMutableDictionary dictionary];
    }
    return self;
}

- (PFQuery *)queryForTable
{
    PFQuery *query = [PFQuery queryWithClassName:self.parseClassName];

    // If Pull To Refresh is enabled, query against the network by default.
    if (self.pullToRefreshEnabled) {
        query.cachePolicy = kPFCachePolicyNetworkOnly;
    }

    // If no objects are loaded in memory, we look to the cache first to fill the table
    // and then subsequently do a query against the network.
    if (self.objects.count == 0) {
        query.cachePolicy = kPFCachePolicyCacheThenNetwork;
    }


        [query orderByAscending:@"order"];

    return query;
}
- (void) objectsDidLoad:(NSError *)error
{
    [super objectsDidLoad:error];
    [self.sections removeAllObjects];
    [self.sectionToSportTypeMap removeAllObjects];

    NSInteger section = 0;
    NSInteger rowIndex = 0;
    for (PFObject *object in self.objects) {
        NSString *sportType = [object objectForKey:@"order"];
        NSMutableArray *objectsInSection = [self.sections objectForKey:sportType];
        if (!objectsInSection) {
            objectsInSection = [NSMutableArray array];

            // this is the first time we see this sportType - increment the section index
            [self.sectionToSportTypeMap setObject:sportType forKey:[NSNumber numberWithInt:section++]];
        }

        [objectsInSection addObject:[NSNumber numberWithInt:rowIndex++]];
        [self.sections setObject:objectsInSection forKey:sportType];
    }
}


- (PFObject *)objectAtIndexPath:(NSIndexPath *)indexPath {
    NSString *sportType = [self sportTypeForSection:indexPath.section];
    NSArray *rowIndecesInSection = [self.sections objectForKey:sportType];
    NSNumber *rowIndex = [rowIndecesInSection objectAtIndex:indexPath.row];
    return [self.objects objectAtIndex:[rowIndex intValue]];
}

#pragma mark - UITableViewDataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return self.sections.allKeys.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    NSString *sportType = [self sportTypeForSection:section];
    NSArray *rowIndecesInSection = [self.sections objectForKey:sportType];
    return rowIndecesInSection.count;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    NSString *sportType = [self sportTypeForSection:section];
    return sportType;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [super tableView:tableView didSelectRowAtIndexPath:indexPath];

    PFObject *selectedObject = [self objectAtIndexPath:indexPath];
}


- (NSString *)sportTypeForSection:(NSInteger)section {
    return [self.sectionToSportTypeMap objectForKey:[NSNumber numberWithInt:section]];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"showDataDetail"]) { //showRecipeDetail

        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        //PFObject *selectedObject = [self objectAtIndexPath:indexPath];
        DataDetailViewController *destViewController = segue.destinationViewController;

        PFObject *object = [self.objects objectAtIndex:indexPath.row];
        AllData *data = [[AllData alloc] init];
        data.title = [object objectForKey:@"title"];
        data.imageFile = [object objectForKey:@"imageFile"];
        data.date = [object objectForKey:@"date"];
        data.information = [object objectForKey:@"information"];
        destViewController.data = data;

    }
}

Answer 1

如果您的表格中有多个部分，但无论您选择的部分是什么，您只是偏离第一部分中的信息，可能是因为这一行：

PFObject *object = [self.objects objectAtIndex:indexPath.row];

从self.objects数组中抓取的对象仅依赖于行而不考虑该部分。

因此，当您的代码现在，如果选择了第2部分中的第1行，假设您的数据是标准顺序（例如A，B，C，D等），您仍然会离开行为了使您的代码按预期工作，您可能需要更改此行：

PFObject *object = [self.objects objectAtIndex:indexPath.row];

到

PFObject *object = [self.objects objectAtIndex:indexPath.row * (indexPath.section + 1)];

这样你就可以乘以（section + 1）来访问self.objects数组中的正确索引。

Answer 2

尝试将其嵌套为IF ELSE语句，如此

if (indexPath.section == 0) {
        //A
        if (indexPath.row == 0) {
            PFObject *object = [self.messagesArray objectAtIndex:indexPath.row];
        }
    }

PFQueryTableViewController多个部分

2 个答案: