objectivec-共享扩展没有显示数据--ios

Question

我正在尝试创建一个共享扩展。我正在将它们显示到"表格"视图中。我的数据来了，但我看不见。它也冻结了(就像我们有数据和弹出窗口，但没有显示(。

这是我的样本代码

//
//  ShareViewController.m
//  myAppShare
//
//  
//
//
#import "ShareViewController.h"
#import "MBProgressHUD.h"
@import MobileCoreServices;
static NSString *const AppGroupId = @"group.tag.BiblioHive7";
@implementation ShareViewController
{
    NSArray *arrayCategory;
    __weak IBOutlet UITextField *textFieldCategoryName;
    __weak IBOutlet UIButton *btnPost;
    __weak IBOutlet UIBarButtonItem *btnCancel;
    __weak IBOutlet UINavigationItem *nayTitle;
    __weak IBOutlet UINavigationBar *navBar;
}
-(void)viewDidLoad
{
    sharedUserDefaults = [[NSUserDefaults alloc] initWithSuiteName:AppGroupId];
    [sharedUserDefaults setObject:@"hello" forKey:@"hello"];
    NSString *userId= [sharedUserDefaults objectForKey:@"userId"];
    NSLog(@"%@", [[sharedUserDefaults objectForKey:@"categories"] class]);
    NSError* error;
    [self didSelectPost];
    if (userId==nil || [userId isEqualToString:@""] )
    {
        [self hideBackground];
        self.view.hidden= YES;
        UIAlertController * alert=   [UIAlertController
                                      alertControllerWithTitle:@"Error"
                                      message:@"Please login into myApp"
                                      preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
            [self hideExtentionView];
        }];
        [alert addAction:defaultAction];
        [self presentViewController:alert animated:YES completion:nil];
    }
    else
    {
    self.view.hidden= NO;
    id jsonObject = [NSJSONSerialization JSONObjectWithData:[sharedUserDefaults objectForKey:@"categories"] options: NSJSONReadingMutableContainers error:&error];
    arrayCategory= [NSArray arrayWithArray:jsonObject];
    // here i am able to print object
    NSLog(@"%@", [arrayCategory class]);
    NSMutableArray *cityArray = [[NSMutableArray alloc] init];
    NSMutableArray *testFeeds = [NSJSONSerialization JSONObjectWithData: [sharedUserDefaults objectForKey:@"categories"] options:NSJSONReadingMutableContainers error:nil];
    [cityArray addObjectsFromArray:testFeeds];
    NSLog(@"%lu", (unsigned long)[cityArray count]);
//    [self.tableViewmyApp reloadData];
    // here you must have to provide your app group id that you already created
}
}

-(void) hideBackground
{
    [self.view setBackgroundColor:[UIColor clearColor]];
    [self.tableViewmyApp setBackgroundColor:[UIColor clearColor]];
    [textFieldCategoryName setBackgroundColor:[UIColor clearColor]];
    [nayTitle setTitle:@""];
    [btnPost setHidden:YES];
    [navBar setHidden:YES];  
}
- (BOOL)isContentValid {
    // Do validation of contentText and/or NSExtensionContext attachments here
    return YES;
}
- (void)didSelectPost {
    // This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
    // Inform the host that we're done, so it un-blocks its UI. Note: Alternatively you could call super's -didSelectPost, which will similarly complete the extension context.

    inputItem = self.extensionContext.inputItems.firstObject;
    NSItemProvider *urlItemProvider = [[inputItem.userInfo valueForKey:NSExtensionItemAttachmentsKey] objectAtIndex:0];
    if ([urlItemProvider hasItemConformingToTypeIdentifier:(__bridge NSString *)kUTTypeURL])
    {
        [urlItemProvider loadItemForTypeIdentifier:(__bridge NSString *)kUTTypeURL options:nil completionHandler:^(NSURL *url, NSError *error)
         {
             if (error)
             {
                 NSLog(@"Error occured");
             }
             else
             {
                 if ([sharedUserDefaults objectForKey:@"userId"]==nil)
                 {
                     UIAlertController * alert=   [UIAlertController
                                                   alertControllerWithTitle:@"Error"
                                                   message:@"You must be logged In to share"
                                                   preferredStyle:UIAlertControllerStyleAlert];
                     UIAlertAction* ok = [UIAlertAction
                                          actionWithTitle:@"OK"
                                          style:UIAlertActionStyleDefault
                                          handler:nil];
                     [alert addAction:ok];
                     [self presentViewController:alert animated:YES completion:nil];
                     return;
                 }

                 NSMutableArray *previousUrlsArray = [[NSMutableArray alloc]initWithArray:[sharedUserDefaults objectForKey:@"urlsArray"]];
                 if (previousUrlsArray==nil)
                 {
                     previousUrlsArray =[[NSMutableArray alloc]init];
                 }
                 [previousUrlsArray addObject:url.absoluteString];
                 NSMutableDictionary *dict= [[NSMutableDictionary alloc]init];
                 [dict setObject:previousUrlsArray forKey:@"urls"];
                 [sharedUserDefaults setObject:dict forKey:@"urlsDictionary"];
                 [sharedUserDefaults setObject:previousUrlsArray forKey:@"urlsArray"];
               //  [sharedUserDefaults synchronize];
                 [sharedUserDefaults setObject:url.absoluteString forKey:@"siteURL"];
                 [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@",url.absoluteString] forKey:@"sURL"];
                 NSLog(@"%@",[sharedUserDefaults objectForKey:@"sURL"]);
//                 NSMutableArray *arrSites;
//                 if ([sharedUserDefaults valueForKey:@"SharedExtension"])
//                     arrSites = [sharedUserDefaults valueForKey:@"SharedExtension"];
//                 else
//                     arrSites = [[NSMutableArray alloc] init];
//                 NSDictionary *dictSite = [NSDictionary dictionaryWithObjectsAndKeys:self.contentText, @"Text", url.absoluteString, @"URL",nil];
//                 [arrSites addObject:dictSite];
//                 [sharedUserDefaults setObject:arrSites forKey:@"SharedExtension"];
//                 [sharedUserDefaults synchronize];
//                 UIAlertController * alert=   [UIAlertController
//                                               alertControllerWithTitle:@"Success"
//                                               message:@"Posted Successfully."
//                                               preferredStyle:UIAlertControllerStyleAlert];
//                 
//                    UIAlertAction* ok = [UIAlertAction
//                                      actionWithTitle:@"OK"
//                                      style:UIAlertActionStyleDefault
//                                      handler:^(UIAlertAction * action)
//                                      {
//                                          [UIView animateWithDuration:0.20 animations:^
//                                           {
//                                               self.view.transform = CGAffineTransformMakeTranslation(0, self.view.frame.size.height);
//                                           }
//                                                           completion:^(BOOL finished)
//                                           {
//                                               [self.extensionContext completeRequestReturningItems:nil completionHandler:nil];
//                                           }];
//                                      }];
//                 
//                 [alert addAction:ok];
//                 [self presentViewController:alert animated:YES completion:nil];
             }
         }];
    }
}

- (NSArray *)configurationItems {
    // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
    return @[];
}
-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyIdentifier"];
    /*
     *   If the cell is nil it means no cell was available for reuse and that we should
     *   create a new one.
     */
    if (cell == nil) {
        /*
         *   Actually create a new cell (with an identifier so that it can be dequeued).
         */
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"MyIdentifier"] ;
        cell.selectionStyle = UITableViewCellSelectionStyleDefault;
    }
    cell.textLabel.text=[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"category_name"];
    return cell;
}

-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [arrayCategory count];
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self saveInUserDefaultsWithCategoryName:[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"category_name"] andId:[[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"id"] integerValue]];
}
- (IBAction)postBtnTapped:(id)sender {
    [self saveInUserDefaultsWithCategoryName:textFieldCategoryName.text andId:-1];
}
-(void) saveInUserDefaultsWithCategoryName : (NSString*) categoryName andId : (NSInteger) categoryId
{
    if ([categoryName stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]].length==0)
    {
        UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Please choose a category or create a new one "
                                                                       message:@""
                                                                preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleCancel handler:nil];
        [alert addAction:okAction];
        [self presentViewController:alert animated:YES completion:nil];
        return;
    }


    NSString *stringId=[sharedUserDefaults objectForKey:@"id"];
    ([stringId length]>0) ? [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@,%ld",stringId, (long)categoryId] forKey:@"id"] : [sharedUserDefaults setObject:[NSString stringWithFormat:@"%ld", (long)categoryId] forKey:@"id"];
    NSLog(@"%@", [sharedUserDefaults objectForKey:@"id"]);
    NSString *stringCategoryName=[sharedUserDefaults objectForKey:@"category_name"];
    ([stringCategoryName length]>0) ? [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@,%@",stringCategoryName, categoryName] forKey:@"category_name"] : [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@",categoryName] forKey:@"category_name"];
    NSLog(@"%@", [sharedUserDefaults objectForKey:@"category_name"]);
    NSString *stringURL=[sharedUserDefaults objectForKey:@"URL"];
    ([stringURL length]>0) ? [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@,%@",stringURL, [sharedUserDefaults objectForKey:@"sURL"]] forKey:@"URL"] : [sharedUserDefaults setObject:[NSString stringWithFormat:@"%@",[sharedUserDefaults objectForKey:@"sURL"]] forKey:@"URL"];
    NSLog(@"%@", [sharedUserDefaults objectForKey:@"URL"]);


    NSDictionary *categoryDictionary = [NSDictionary dictionaryWithObjectsAndKeys:categoryName,@"categoryName", nil];
    NSArray *categoryArray = [NSArray arrayWithObject:categoryDictionary];

    NSMutableDictionary *mainDictionary = [[NSMutableDictionary alloc]init];
    [mainDictionary setObject:categoryArray forKey:@"categories"];
    [mainDictionary setObject:@"0" forKey:@"categoryType"];
    [mainDictionary setObject:[sharedUserDefaults objectForKey:@"siteURL"] forKey:@"url"];
    [mainDictionary setObject:[sharedUserDefaults objectForKey:@"access_token"] forKey:@"access_token"];
    AppServices *appServices = [AppServices sharedInstance];
    appServices.delegate = self;
    [appServices postCategoriesOnServer:mainDictionary withSucessBlock:nil withfailureBlock:nil];
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];
   // [self enableUserInteraction:NO];
   // [[AppServices sharedInstance] sendData:nil withSucessBlock:nil withfailureBlock:nil];

//    [sharedUserDefaults setObject:[NSNumber numberWithInteger:categoryId] forKey:@"id"];
//    [sharedUserDefaults setObject:categoryName forKey:@"category_name"];


//    NSMutableDictionary *dict=[[NSMutableDictionary alloc] init];
//    
//    [dict setObject:categoryName forKey:@"category_name"];
//    [dict setObject:[NSNumber numberWithInteger:categoryId] forKey:@"id"];
//    NSLog(@"%@", [sharedUserDefaults objectForKey:@"siteURL"]);
//
//    [dict setObject:[sharedUserDefaults objectForKey:@"siteURL"] forKey:@"siteurl"];
//    
//    
//    [sharedUserDefaults setObject:[self dictToJson:dict] forKey:@"categorydictionary"];
}
-(NSString *)dictToJson:(NSDictionary *)dict
{
    NSError *error;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject: dict
                                                       options:(NSJSONWritingOptions)  (/* DISABLES CODE */ (YES) ? NSJSONReadingMutableContainers : 0)
                                                         error:&error];
    if (! jsonData) {
        NSLog(@"bv_jsonStringWithPrettyPrint: error: %@", error.localizedDescription);
        return @"{}";
    } else {
        return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    }
}

- (IBAction)cancelBtnTapped:(id)sender {
    [self hideExtentionView];
}
-(void) hideExtentionView
{
    [self.extensionContext completeRequestReturningItems: nil completionHandler: nil];
}
-(void) showAlertViewWithMessage:(NSString *)message
{
    UIAlertController* alert = [UIAlertController alertControllerWithTitle:nil
                                                                   message:message
                                                            preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        [self hideExtentionView];
    }];
    [alert addAction:defaultAction];
    [self presentViewController:alert animated:YES completion:nil];
}
-(void)enableUserInteraction:(BOOL)enable
{
    [self.view setUserInteractionEnabled:enable];
}
#pragma mark- AppServicesDelegate methods
-(void)showMessage:(NSString *)message
{
    [MBProgressHUD hideHUDForView:self.view animated:YES];
  //  [self enableUserInteraction:YES];
    [self showAlertViewWithMessage:message];
}

@end

Answer 1

您的问题是想要用一个数组对象填充表单元格textLabel，而该数组对象没有用键值保存。在中

-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

方法获取尚未保存在该键上的对象。

cell.textLabel.text=[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"category_name"];

和

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
     [self saveInUserDefaultsWithCategoryName:[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"category_name"] andId:[[[arrayCategory objectAtIndex:indexPath.row] valueForKey:@"id"] integerValue]]; 
}

方法，在这里保存对象。

这是一种糟糕的做法。