Question

我遇到了保存UITableViewCell状态的问题，无法弄清楚如何解决它。希望有人可以帮助我。

说明： 服务器上有一个API，我从中获取数据，然后将其存储在NSMutableArray中。数组的每个对象都包含属性ready，可以是1或0。所以我对使用这些数据填充UITableView没有问题，但并不是每个数据对象都准备就绪（即0），我需要在服务器上完成进度，然后在每个单元格中显示它需要它。我在UIProgressView的动态原型中UITableViewCell并在获得后设置进度。如果这样的“未准备好”对象只有一个，则没有问题。但如果有很多物体我无法显示进展，我不明白为什么。

所以这是我的代码。

cellForRowAtIndexPath方法：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"readyCell";
AVMMovieCell  *cell = [self.readyTable dequeueReusableCellWithIdentifier:CellIdentifier];
    // Configure the cell...
if (cell == nil) {
    cell = (AVMMovieCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
}
AVMFilmsStore *oneItem;
oneItem = [readyArray objectAtIndex:indexPath.row];
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:(unsigned int)indexPath.row];

if (oneItem.ready==1){
    cell.progressLabel.hidden = YES;
    cell.progressLine.hidden = YES;

if ([selecedCellsArray containsObject:[NSString stringWithFormat:@"%@",rowNsNum]]  )
{

    if (![cell.progressLabel.text isEqualToString:@""]&& ![cell.progressLabel.text isEqualToString:@"Success"] && ![cell.progressLabel.text isEqualToString:@"Creating"]){
        cell.progressLabel.hidden = NO;
        cell.progressLine.hidden = NO;
    } else {
        cell.progressLabel.hidden = YES;
        cell.progressLine.hidden = YES;
      }
}
else{
    if(!oneItem.isProcessing && !cell.selected){
    cell.progressLabel.hidden = YES;
    cell.progressLine.hidden = YES;
    }
}
} else { //if processing
if (![processingCellsArray containsObject:[NSString stringWithFormat:@"%@",rowNsNum]]){
    [processingCellsArray addObject:[NSString stringWithFormat:@"%@",rowNsNum]];
    if (!cell.isSelected){

        [cell setSelected:YES];

    }
    cell.progressLabel.hidden = NO;
    cell.progressLine.hidden = NO;

    NSArray * arrayOfThingsIWantToPassAlong =
    [NSArray arrayWithObjects: cell, oneItem, indexPath, nil];

    if(!isMaking){
        [self performSelector:@selector(getProgress:)
                   withObject:arrayOfThingsIWantToPassAlong
                   afterDelay:0];
    } else{
    [self performSelector:@selector(getProgress:)
               withObject:arrayOfThingsIWantToPassAlong
               afterDelay:0.5];
    }

    isMaking = YES;

} else {
    if (!cell.isSelected){
        [cell setSelected:YES];
    }

    cell.progressLabel.hidden = NO;
    cell.progressLine.hidden = NO;

    NSArray * arrayOfThingsIWantToPassAlong =
    [NSArray arrayWithObjects: cell, oneItem, indexPath, nil];

    if(!isMaking){
        [self performSelector:@selector(getProgress:)
                   withObject:arrayOfThingsIWantToPassAlong
                   afterDelay:0];
    } else{
    [self performSelector:@selector(getProgress:)
               withObject:arrayOfThingsIWantToPassAlong
               afterDelay:0.3];
    }


    isMaking = YES;
    }

   }
    return cell;
 }

和 getProgress方法：

-(void)getProgress:(NSArray*)args{

if (progManager == nil && !progStop){
    __block AVMFilmsStore * oneItem = args[1];
    if(!oneItem.isLocal){
        __block AVMMovieCell * cell = args[0];
        __block NSIndexPath *indexPath = args[2];
        progManager = [AFHTTPRequestOperationManager manager];
        __block NSString *token = [defaults objectForKey:@"token"];
        __block NSString *header = [NSString stringWithFormat:@"Bearer %@",token];
        __block NSDictionary *params = @{@"lang": NSLocalizedString(@"lang",nil),@"project":oneItem.fileId};
        __block NSString *oneHundredPercent;
        __block NSString *progIsText;

        progManager.responseSerializer = [AFJSONResponseSerializer serializer];
        [progManager.requestSerializer setValue:header forHTTPHeaderField:@"Authorization"];
        if(cell.selected || isMaking) { //if I just check for "cell.selected" is always "NO"
            [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
            [progManager POST:@"http://example.com/api/project/get-progress" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
                if ([[responseObject objectForKey:@"result"]isEqualToString:@"success"]){
                    progCreate = [responseObject objectForKey:@"progress"];

                    oneHundredPercent = @"100";
                    if ([progCreate intValue]==[oneHundredPercent intValue]){
                        if([processingCellsArray containsObject:[NSString stringWithFormat:@"%ld",(long)indexPath.row]]){
                            [processingCellsArray removeObject:[NSString stringWithFormat:@"%ld",(long)indexPath.row]];
                            [cell setSelected:NO];

                        }
                        [readyArray removeAllObjects];
                        [defaults setObject:@"false" forKey:@"isSomethingInSort"];
                        isMaking = NO;
                        [self getReadyMovies:progIsText nameLabel:oneItem.fileName];

                    } else{
                        if([progCreate intValue]>=50){
                            if([progCreate intValue]>=60){
                                self.navigationController.navigationItem.leftBarButtonItem.enabled = YES;
                               createMainButton.enabled = YES;
                            }
                            [[NSNotificationCenter defaultCenter] postNotificationName:@"gotFiftyNote" object:@"50"];
                            [cell.progressLine setProgress:[progCreate floatValue]/100 animated:YES];
                        } else {
                            [cell.progressLine setProgress:progUploadLimit];
                        }
                        progManager = nil;
                        progManager.responseSerializer = nil;
                        progManager.requestSerializer = nil;
                        token = nil;
                        header = nil;
                        params = nil;
                        progIsText = nil;
                        oneItem = nil;
                        cell = nil;
                        indexPath = nil;
                        isMaking = YES;
                        progCreate = nil;
                        oneHundredPercent = nil;

                        [self getProgress:args];
                    }
                }
            } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
                NSLog(@"Error: %@", error.localizedDescription);
            }];

        }

    }
  }
}

任何建议对我都有帮助。这个问题让我头疼了两个星期。

Answer 1

我看到了你的代码，但很难跟上这些大型方法。我不会跟踪数组中的处理单元格。每个单元格都有一个要表示的对象，那些对象的bool值为ready和进度值，对吧？所以尝试这样的事情：

确保每个单元格都有一个progressView作为子视图。
您的单元格类应该有一个名为styleForReady的公共方法：（bool）isReady andPressress：（nsinteger）progress
针对每个型号进行服务调用以查看它们是否已完成。每当该服务调用返回时，您只需更新数组中的模型对象，并在获得新的进度值后执行[self.tableView reloadData]。这将触发numberOfRows（应该返回arrayOfObjects.count）和cellForRowAtIndexPath :(这应该使该indexPath的单元格出列，获取表示该单元格的模型，类似于arrayOfObjects [indexPath.row]，最后，调用单元格来自行调整样式基于该模型做[cell styleForReady：objectModel.ready andProgress：objectModel.progress]）

请记住，控制器应该只跟踪模型对象，使单元格出列并告诉单元格通过模型的样式。不要将所有逻辑都放在控制器中。

检查进度在哪里是必要的UITableView

1 个答案: