在 IOS 中播放 ViewController 中选择的视频

Posted 2023-02-23

【中文标题】在 IOS 中播放 ViewController 中选择的视频

【英文标题】：Playing video chosen in ViewController in IOS

【发布时间】：2014-05-25 03:58:23

【问题描述】：

我有一个主从应用程序。在那里，我已经能够下载一个 XML 文件并将其用作一个数组。

但我想选择一个标签并让它播放视频。

除了以下代码块之外，所有这些都有效。

(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

当我尝试分配 MPMoviePlayer 时，它会使程序崩溃。任何见解将不胜感激。

代码：

MasterViewController.h

#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>

@interface MasterViewController : UITableViewController

@property (strong, nonatomic) NSDictionary *presidents;
@property (strong, nonatomic) NSArray *number;
@property (strong, nonatomic) NSArray *name;
@property (strong, nonatomic) NSArray *years;
@property (strong, nonatomic) NSArray *party;
@property (strong, nonatomic) NSArray *image;

@end

MasterViewController.m

#import "MasterViewController.h"
#import "DetailViewController.h"

@interface MasterViewController () 
NSMutableArray *_objects;

@end

@implementation MasterViewController

@synthesize number, name, years, party, image;

- (void)awakeFromNib

[super awakeFromNib];


- (void)viewDidLoad

self.navigationItem.title=@"Presidents";

NSString *urlStr = [[NSString alloc]
                    initWithFormat:@"http://pickupboyd.com/wordpress/wp-content/uploads/2012/04/Presidents12.plist"];

NSURL *url = [NSURL URLWithString:urlStr];
_presidents = [[NSDictionary alloc] initWithContentsOfURL:url];


name = [_presidents objectForKey:@"Names"];
years = [_presidents objectForKey:@"Years"];
party = [_presidents objectForKey:@"Party"];
image = [_presidents objectForKey:@"Images"];



[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;


- (void)didReceiveMemoryWarning

[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.


- (void)insertNewObject:(id)sender

if (!_objects) 
    _objects = [[NSMutableArray alloc] init];

[_objects insertObject:[NSDate date] atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
 

 #pragma mark - Table View

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

return 1;


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

//This is to the get count of the array in dictionary "Presidents" called Number
number = [_presidents objectForKey:@"Number"];
return number.count;


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

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];


NSString *nameOfPresident = [name objectAtIndex:indexPath.row];
cell.textLabel.text = nameOfPresident;

NSString *datesInOffice = [years objectAtIndex:indexPath.row];
cell.detailTextLabel.text = datesInOffice;

//set the image view-------------------------------------


NSString *presidentImages = [image objectAtIndex:indexPath.row];
cell.imageView.image = [UIImage imageNamed:presidentImages];


return cell;


 - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath

// Return NO if you do not want the specified item to be editable.
return YES;


- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

if (editingStyle == UITableViewCellEditingStyleDelete) 
    [_objects removeObjectAtIndex:indexPath.row];
    [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
 else if (editingStyle == UITableViewCellEditingStyleInsert) 
    // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.

 



 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
 
if ([[segue identifier] isEqualToString:@"showDetail"]) 
    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

    NSURL *movieURL = [party objectAtIndex:indexPath.row];
    MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
    [[player view] setFrame:[self.view bounds]];
    [self.view addSubview:[player view]];
    [player play];

    MPMoviePlayerViewController *playVideo = [[MPMoviePlayerViewController alloc]initWithContentURL:movieURL];

    //NSDate *object = _objects[indexPath.row];
    [[segue destinationViewController] presentMoviePlayerViewControllerAnimated:playVideo];

 

 @end

DetailViewController.h

 #import <UIKit/UIKit.h>
 #import <MediaPlayer/MediaPlayer.h>

 @interface DetailViewController : UIViewController

 @property (strong, nonatomic) id detailItem;

 @end

DetailViewController.m

#import "DetailViewController.h"

@interface DetailViewController ()
- (void)configureView;
@end

@implementation DetailViewController

#pragma mark - Managing the detail item


 - (void)configureView

// Update the user interface for the detail item.



- (void)viewDidLoad

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];


- (void)didReceiveMemoryWarning

[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.


@end

【问题讨论】：

您能否提供有关崩溃的任何信息？

请尝试仅添加代码的相关部分，而不是仅粘贴整个文件。还要始终包含您收到的错误。

抱歉，感谢您的意见。我对延误表示歉意。错误是：在主线程 1：信号 SIGABRT。谢谢！

【参考方案1】：

尝试更改此行：

[[player view] setFrame:[self.view bounds]];

到这里：

[[player view] setFrame:[self.view frame]];

请参阅this 了解边界和框架之间的差异。

【讨论】：

谢谢你。我确实尝试过，但仍然收到主要错误。我将继续为此努力。这是我第一次发帖，非常感谢您的意见。

【参考方案2】：

这是我在点击按钮后在视图中播放视频的代码

#import <UIKit/UIKit.h>
#import <MediaPlayer/MediaPlayer.h>

@interface ViewController : UIViewController


NSURL * videoURL;
UITableView * view;


@property (nonatomic, strong) MPMoviePlayerController*player;


-(IBAction)playMovie;

@end

.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

-(IBAction)playMovie

NSString *url = [[NSBundle mainBundle]
                 pathForResource:@"testy3 (Converted)" ofType:@"mov"];
self.player = [[MPMoviePlayerController alloc]
               initWithContentURL: [NSURL fileURLWithPath:url]];

// Play Partial Screen
self.player.view.frame = CGRectMake(0, 0, 320, 400);
[self.view addSubview:self.player.view];

// Play Movie
[self.player play];



- (void)viewDidLoad

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.


- (void)didReceiveMemoryWarning

[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.


@end

【讨论】：

我今天会试试这个，让你知道。看来我可能没有分配 MPMoviePlayer？再次感谢！

那么，为了清楚起见，分配一个 UIView 会比尝试使用 segue 方法在 Detail ViewController 中执行此操作更好吗？看起来好像您基本上在需要时分配 UIView 并且不真正使用情节提要 segue？谢谢，只是想让我明白所有这些。