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ここで私の問題に関する多くの投稿を読みましたが、まだ機能していないので、事前に助けてくれてありがとう.

カスタムペン先をロードするテーブルビューがあります。Web JSON ファイルからのデータがあります。私はリフレッシュコールを実装しました（今はセルタップだけでこれをオーバーライドしています）。

メソッドを呼び出すと、新しい JSON が呼び出されて解析されます。そして、セルが更新されました。これは、テーブルビューを下にスクロールすることで確認できます。新しい行のように見えます。ただし、表示されている行は残ります。

配列を nil にしようとしましたが、オブジェクトに基づいて循環して削除しようとしましたが、何も機能していないようです。

ここにコードがあります

#import "MMNewsViewController.h"
#import "MMCatsDetailController.h"
#import "CellView.h"
#import "FeatureCell.h"
//#import "MMnewsData.h"



@interface MMNewsViewController ()

@end

@implementation MMNewsViewController
@synthesize titleData;
@synthesize imageData;
@synthesize imageLargeData;
@synthesize dateData;
@synthesize descriptionData;
@synthesize linkData;
@synthesize cityData;

@synthesize _jsonResult;
@synthesize _jsonResultImage;
@synthesize _jsonResultImageLarge;
@synthesize _jsonResultDate;
@synthesize _jsonResultDescription;
@synthesize _jsonResultLink;
@synthesize _jsonResultCity;
@synthesize featureImage;
@synthesize region;





- (void)viewDidLoad
{
    [super viewDidLoad];

    UINib *nib = [UINib nibWithNibName:@"CellView" bundle:nil];
    [self.tableView registerNib:nib forCellReuseIdentifier:@"CellView"];

    [self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
    self.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:0];

    self.navigationController.title = @"News";

    self.tabBarItem.title = @"FooBar";
    self.title = @"Music News";



 UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];

refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Pull to Refresh"];

[refreshControl addTarget:self action:@selector(refreshView:)        
forControlEvents:UIControlEventValueChanged];

[self.view addSubview:refreshControl];
[self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

    region = @"wellington";
    [self makeDataRequests];


}

-(void)makeDataRequests
{


    NSString *strURL = [NSString stringWithFormat:@"MYSITEjson.php?region=%@",region  ];



    NSMutableData *dataURL = [NSData dataWithContentsOfURL:[NSURL URLWithString:strURL] ];
    NSMutableDictionary *arrayResult = [NSJSONSerialization JSONObjectWithData:dataURL options:kNilOptions    error:nil];

    NSMutableArray *dataArray = [arrayResult objectForKey:@"tickets"]; //2

    _jsonResult = [[NSMutableArray alloc] init];
    _jsonResultImage = [[NSMutableArray alloc] init];
    _jsonResultImageLarge = [[NSMutableArray alloc] init];
    _jsonResultDate= [[NSMutableArray alloc] init];
    _jsonResultDescription= [[NSMutableArray alloc] init];
    _jsonResultLink= [[NSMutableArray alloc] init];
    _jsonResultCity= [[NSMutableArray alloc] init];


    for(NSMutableDictionary *newsDict in dataArray){
        NSMutableDictionary *titleDict = [newsDict objectForKey:@"title"];
        NSMutableDictionary *imageDict = [newsDict objectForKey:@"image"];
        NSMutableDictionary *imageLargeDict = [newsDict objectForKey:@"imageLarge"];
        NSMutableDictionary *dateDict = [newsDict objectForKey:@"pubDate"];
        NSMutableDictionary *descriptionDict = [newsDict objectForKey:@"description"];
        NSMutableDictionary *linkDict = [newsDict objectForKey:@"link"];

       NSMutableDictionary *cityDict = [[newsDict objectForKey:@"venue"] objectForKey:@"city"];


        [_jsonResult addObject:titleDict];
        [_jsonResultImage addObject:imageDict];
        [_jsonResultImageLarge addObject:imageLargeDict];
        [_jsonResultDate addObject:dateDict];
        [_jsonResultDescription addObject:descriptionDict];
        [_jsonResultLink addObject:linkDict];
         [_jsonResultCity addObject:cityDict];
       //  NSLog(@"%@",cityDict);

    }

    //   NSString *strResult = [[NSString alloc] initWithData:dataURL encoding:NSUTF8StringEncoding];



    self.titleData = _jsonResult;
    self.imageData = _jsonResultImage;
    self.imageLargeData = _jsonResultImageLarge;
    self.dateData = _jsonResultDate;
    self.descriptionData = _jsonResultDescription;
    self.linkData = _jsonResultLink;
    self.cityData = _jsonResultCity;


[self performSelector:@selector(delayedReloadData) withObject:nil afterDelay:1.5];
}
-(void) delayedReloadData
{

     NSLog(@"delayedReloadData");
   [self.tableView reloadData];

}

- (void)reloadRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation{

       NSLog(@"reloadRowsAtIndexPaths");
}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{


    NSLog(@"COUNTER: %i",[self.titleData count]);
    // Return the number of rows in the section.
   return [self.titleData count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
      NSLog(@"cellForRowAtIndexPath");

   NSUInteger row  = [indexPath row];



        static NSString *CellIdentifier = @"CellView";

        CellView *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

        if (cell == nil){
            NSLog(@"New Cell Made");

            NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CellView" owner:nil options:nil];

            for(id currentObject in topLevelObjects)
            {
                if([currentObject isKindOfClass:[CellView class]])
                {
                    cell = (CellView *)currentObject;
                    break;
                }
            }
        }



         [[cell titleLabel] setText:[titleData objectAtIndex:row]];
         [[cell dateLabel] setText:[cityData objectAtIndex:row]];

        NSData *data = [NSData dataWithContentsOfURL: [NSURL URLWithString:[imageData objectAtIndex:row]]];
        UIImage *img1 = [UIImage imageWithData:data];
        [[cell imageLabel] setImage:img1];

        return cell;


    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;


}


#pragma mark - Table view delegate
- (void)deselectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated{}



- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.

     MMCatsDetailController *detailViewController = [[MMCatsDetailController alloc] initWithNibName:@"MMCatsDetailController" bundle:nil];



    NSUInteger row  = [indexPath row];
    NSString *titleSender = [titleData objectAtIndex:row];
    NSString *dateSender = [dateData objectAtIndex:row];
    NSString *imageSender = [imageData objectAtIndex:row];
    NSString *imageLargeSender = [imageLargeData objectAtIndex:row];
    NSString *descriptionSender = [descriptionData objectAtIndex:row];
    NSString *linkSender = [linkData objectAtIndex:row];

    detailViewController.titleSend = titleSender;
    detailViewController.dateSend = dateSender;
    detailViewController.imageSend = imageSender;
    detailViewController.imageLargeSend = imageLargeSender;
    detailViewController.descriptionSend = descriptionSender;
    detailViewController.linkSend = linkSender;

      //NSLog(@"linkSender=%@",linkSender);
        region = @"nelson";
[self makeDataRequests];
    //   [self.navigationController pushViewController:detailViewController animated:YES];
  [tableView deselectRowAtIndexPath:indexPath animated:YES];

}
-(void)refreshView:(UIRefreshControl *)refresh {
       refresh.attributedTitle = [[NSAttributedString alloc] initWithString:@"Refreshing data..."];
       // custom refresh logic would be placed here...
         region = @"nelson";
    [self makeDataRequests];


    NSLog(@"HEre");

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MMM d, h:mm a"];
      NSString *lastUpdated = [NSString stringWithFormat:@"Last updated on %@",

                                        [formatter stringFromDate:[NSDate date]]];
    refresh.attributedTitle = [[NSAttributedString alloc] initWithString:lastUpdated];

      [refresh endRefreshing];
     NSLog(@"HEre");

 }

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
     NSLog(@"numberOfSectionsInTableView");
    return 1;
}

 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSUInteger row  = [indexPath row];

    if(row==0){
   //     return 200;
    }
    else{


//    return 96;

          }
      return 96;
}


 - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{


    UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0,0,tableView.frame.size.width,10)];

    UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, headerView.frame.size.width, headerView.frame.size.height)];

    headerLabel.font = [UIFont boldSystemFontOfSize:12];
    headerLabel.text = @"Music News";
    headerLabel.backgroundColor = [UIColor blackColor];
     headerLabel.textColor = [UIColor whiteColor];
    [headerView addSubview:headerLabel];

    return headerView;

}


@end
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2 に答える 2

0

tableView で reloaddata を呼び出すだけです。呼び出していると思われる tableView で reloaddata を呼び出していないか、セルが tableView:cellForRowAtIndexPath: で適切にセットアップされていないか、メイン スレッド以外で reloaddata を呼び出しています。

UI スレッドからサーバーへの同期呼び出しを行うべきではありません。GCDについて少し読んでください。関数 dispatch_async は、サービスへの非ブロッキング呼び出しを行うときに便利です。

于 2013-03-25T03:49:46.110 に答える
0 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"CueTableCell";

CueTableCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

if (cell == nil) {
    NSArray *array = [[NSBundle mainBundle] loadNibNamed:@"CueTableCell XibName" owner:self options:nil];
    // Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
    cell = [array objectAtIndex:0];
}

return cell;
}
于 2013-03-25T04:05:05.307 に答える