试图用第一个视图中取消选择的播放列表项调用第二表视图

Question

也许有人能帮我解决问题。我似乎无法使用cocalibspotify显示播放列表项。我已经设置了我的播放列表视图，第一个ableviewcontroller显示播放列表，但当我尝试调用所选播放列表的项目时，我的输出显示时，似乎得到了0行。第一个视图显示了我如何将indexpath传递给secondviewcontroller。第二个脚本显示了playlistitemsTavle视图控制器的.h和.m文件。

概述.m-tableView与播放列表

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [playlistView deselectRowAtIndexPath:indexPath animated:NO];
    playlistItemViewController *trailsController = [[playlistItemViewController alloc] initWithStyle:UITableViewStylePlain];
    trailsController.currentPlaylist = [playlistArray objectAtIndex:indexPath.row];
    //[[self navigationController] pushViewController:trailsController animated:YES];
    [self getSongs];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"showPlaylistItem"]) {
        UITableViewCell *BasicCell = (UITableViewCell *) sender;
        NSIndexPath *ip = [self.tableView indexPathForCell:BasicCell];
        SPPlaylist *selectedPlaylist = [playlistArray objectAtIndex:ip.row];
        playlistItemViewController *pivc = (playlistItemViewController *) segue.destinationViewController;
        pivc.currentPlaylist = selectedPlaylist;
    }
}

playlistitemsViewController.h-

   #import <UIKit/UIKit.h>
    #import "CocoaLibSpotify.h"
    #import "Simple_PlayerAppDelegate.h"
    #import "overViewController.h"

    @interface playlistItemViewController : UITableViewController
    {
        UITableView *tableView;
    }
    @property (retain, nonatomic) IBOutlet UITableView *tableView;
    @property (strong, readwrite, nonatomic) SPPlaylist *currentPlaylist;


    @end

playlistViewController.m-这应该调用播放列表项

#import "playlistItemViewController.h"

@interface playlistItemViewController ()
@end

@implementation playlistItemViewController {
}
@synthesize currentPlaylist;
@synthesize tableView;

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (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
{
    // Return the number of rows in the section.
    NSLog(@"numberOfRowsInSection: %d",[[currentPlaylist items] count]);
    return [[currentPlaylist items] count];
}
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"SubtitleCell";
    UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    cell.textLabel.text = [[[currentPlaylist items] objectAtIndex:indexPath.row] valueForKey:@"name"];
    return cell;

    if (indexPath.row == 0) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"SubtitleCell"];
        [[cell.backgroundView  superview] bringSubviewToFront:cell.backgroundView];
        cell.textLabel.text = @"";
    }
    else{
        if (cell == nil) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"SubtitleCell"];
        }
        SPPlaylistItem * item = [[currentPlaylist items] objectAtIndex:[[currentPlaylist items]count] - indexPath.row];
        cell.textLabel.text = [item.item name];
        if (item.itemClass == [SPTrack class]) {
            SPTrack * track = item.item;
            cell.detailTextLabel.text = [track consolidatedArtists];
        }
    }
    return cell;

}

@end

Answer 1

在项目可用之前，您需要等待播放列表加载。

您的播放列表视图控制器需要使用SPAsyncLoading来加载播放列表，列表如下：

[SPAsyncLoading waitUntilLoaded:self.currentPlaylist timeout:kSPAsyncLoadingDefaultTimeout then:^(NSArray *loadedItems, NSArray *notloadedItems) {
    [self.tableView reloadData];
}];

播放列表加载可能需要一段时间，所以一定要设置一些"加载"UI。您还需要以类似的方式加载可见轨迹，然后才能获得它们的名称。