Question

我知道这很简单，但我试过并且无法修复它。我错过了什么？

我在表格视图单元格中放置了一系列图像。一旦图像被点击segue到新的viewcontroller。然后，新的视图控制器将播放与图像对应的视频。

我想将所选图像传递到下一个视图并播放正确的视频。如何将vid1或vid2或vid3传递给下一个控制器？

- (void)viewDidLoad
{
[super viewDidLoad];
Videos *vid1 = [Videos new];
vid1.name = @"name1";
vid1.detail = @"18:39 - 19:10";
vid1.imageFile = @"img1.png";
vid1.url = @"http://pv...mp4";

Videos *vid2 = [Videos new];
vid2.name = @"name2";
vid2.detail = @"6:51 - 7:10";
....
videos = [NSArray arrayWithObjects:vid1, vid2, vid3, nil];
}

// TABLE VIEW //
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath
{
static NSString *CellIdentifier = @"VideoCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

// Configure the cell...
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
Videos * video = [videos objectAtIndex:indexPath.row];

UIImageView *videoImageView = (UIImageView *)[cell viewWithTag:100];
videoImageView.image = [UIImage imageNamed:video.imageFile];

return cell;
}

// SEGUE // - （void）prepareForSegue：（UIStoryboardSegue *）segue sender：（id）sender {

if ([[segue identifier] isEqualToString:@"showVideo"]) {

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[sender tag] inSection:
                              [[sender superview] tag]];

    playVideoViewController *destViewController = segue.destinationViewController;
    // problem here
    destViewController.video = [videos objectAtIndex:(long)indexPath.row];

    NSLog(@"Segue to video page");
}
}

在我的playVideoViewController中：

-(void)showvideo {
NSNotificationCenter* center = [NSNotificationCenter defaultCenter];

[center addObserver:self selector:@selector(mPMoviePlayerLoadStateDidChangeNotification) name:MPMoviePlayerLoadStateDidChangeNotification object:nil];
[center addObserver:self selector:@selector(readytoplay) name:MPMoviePlayerReadyForDisplayDidChangeNotification object:nil];

NSURL* url = [NSURL URLWithString:
         @"http://pv...mp4"];

//NSLog(@"url: %@", url);

self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
self.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
}

如何从数组中检索正确的项目并进行播放？

感谢您寻找

Answer 1

我几乎没有使用故事板两年而且我不熟悉它。但是你的代码的某些部分没有意义。

在prepareForSegue：sender

中

if ([[segue identifier] isEqualToString:@"showVideo"]) 
{
    // Here I don't think you were getting a right index path
    NSIndexPath *selectedRowIndexPath = [self.tableview indexPathForSelectedRow];

    playVideoViewController *destViewController = segue.destinationViewController;

    // so maybe you are always getting the first video in the array or one you don't expect  
    destViewController.video = [videos objectAtIndex:(long)selectedRowIndexPath.row];
}

在playVideoViewController中

- (void)showVideo
{
    // I got this part from apple's doc and some other SO
    // But the idea I want to point out is you should get url from self.video which you assigned on prepareForSegue:sender in the previous controller.
    MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:self.video.url]];
    player.movieSourceType = MPMovieSourceTypeFile;
    player.controlStyle = MPMovieControlStyleDefault;
    [player play];
    [self.view addSubview: player.view];
    [player setFullscreen:YES animated:YES];
}

objective c - 播放所选图像中的视频

1 个答案: