Question

当我滚动表格视图时，我的图像会移动到错误的单元格。当图像显示或不显示时，我已经设置了一些条件，但无论我尝试过什么，它们都会继续移动。我的代码如下。

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

    static NSString *cellID = @"myCell";

    CustomTableView *cell = [tableView dequeueReusableCellWithIdentifier:cellID];


    if (cell == nil) {
        if (self.view.frame.size.height == 736) {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCelliPhone6+" owner:self options:nil];
            cell = [nib objectAtIndex:0];

        }
        else if (self.view.frame.size.height == 667){
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCelliPhone6" owner:self options:nil];
            cell = [nib objectAtIndex:0];
        }
        else if (self.view.frame.size.height == 568) {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCelliPhone5" owner:self options:nil];
            cell = [nib objectAtIndex:0];

        }
        else if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCelliPad" owner:self options:nil];
            cell = [nib objectAtIndex:0];
        }
        else {
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomTableView" owner:self options:nil];
            cell = [nib objectAtIndex:0];
        }

    }

     MusicFileInfo *musicFileInfo = [mMusicInfoArray objectAtIndex:indexPath.row];
     cell.trackName.text = musicFileInfo.mDesc;
     cell.trackName.backgroundColor = [UIColor clearColor];
     cell.trackName.font = [UIFont fontWithName:@"AvenirNext-Regular" size:13.0];

    if (songPlaying == indexPath.row && mAudioPlayer.isPlaying) {

        [cell.playButton setBackgroundImage:[UIImage imageNamed:@"pauseBtn.png"] forState:UIControlStateNormal];
        [cell.playButton addTarget:self action:@selector(pause:) forControlEvents:UIControlEventTouchUpInside];
        cell.playButton.tag = indexPath.row;

    }

    else  {
        [cell.playButton setBackgroundImage:[UIImage imageNamed:@"playBtn.png"] forState:UIControlStateNormal];
        [cell.playButton addTarget:self action:@selector(playPreview:) forControlEvents:UIControlEventTouchUpInside];
        cell.playButton.tag = indexPath.row;
    }



    if ([[NSUserDefaults standardUserDefaults] boolForKey:[NSString stringWithFormat:@"pack%li", (long)indexPath.row]] == true || [[NSUserDefaults standardUserDefaults] boolForKey:@"unlockAllTracks"] == true) {

        cell.rightImage.image = nil;


    }

    if ([[NSUserDefaults standardUserDefaults] boolForKey:[NSString stringWithFormat:@"pack%li", (long)indexPath.row]] == false) {
        if (indexPath.row <= 4) {
            cell.rightImage = nil;

        } else

        [cell.rightImage setImage:[UIImage imageNamed:@"iapBtnStore.png"]];

    }


    cell.backgroundColor = [UIColor colorWithRed:231.0f/255.0f green:235.0f/255.0f blue:236.0f/255.0f alpha:1];
    cell.tag = indexPath.row;
    return cell;

}

播放按钮和曲目标签很好，它们可以正常工作，但右图是问题所在。

前5个单元格在第一次加载时不应该有图像，在第二次加载时，前5个单元格应该有星形图像，其余单元格应该有挂锁图像。在完成IAP之后，取决于indexpath.row，那么挂锁图像应该不再存在。

我正在检查NSUserDefaults。

我希望我已经妥善解释了。

感谢您的帮助

Answer 1

UITableViewCells可以重复使用以提高内存效率和性能，因此您需要重置＆＃34;重置＆＃34;任何可能根据项目状态发生变化的元素，或者它可能会重新出现在列表中的其他位置。

因此＆＃34;可重复使用＆＃34;： [tableView dequeueReusableCellWithIdentifier:cellID];

if (cell == nil) {
  // load nib if needed
}
cell.rightImage = nil; // always reset image

滚动时Tableview单元格图像移动到不同位置

1 个答案: