Question

经过漫长的一天研究，为什么1024x768视频无法在iPad 3上运行，以及大量的论坛搜索。我找不到任何合理的解决方案来解决这个问题。看起来很多人只有黑屏才会出现相同情况。

解决方案是将视频呈现为1024x 748.原因是iPad顶部显示的状态栏为20px。

我希望这可以解决他们在这种情况下遇到的许多用户问题。

在我的下一个问题上......

我目前通过MPMoviePlayerController将视频嵌入到我的视图中。此视频处于恒定循环（动画菜单）。然后我在视频顶部分层有三个隐形按钮，调用方法。我目前只有一个工作，另外两个只是显示警报。

我目前遇到的问题是，当点击按钮时，我想播放另一个视频。这是完美的工作，但我想第一个视频到第一个播放到最后播放下一个视频，原因是，我需要它也是无缝的，并不明显它从一个视频到另一个视频。

对此的任何反馈都会很棒....

#import "MainViewController.h"
#import "VideoPlayerViewController.h"
#import <MediaPlayer/MediaPlayer.h>
#import <UIKit/UIKit.h>

@interface MainViewController () 

@property (nonatomic, retain) MPMoviePlayerController *playerViewController;
@property (nonatomic, retain) VideoPlayerViewController *myPlayerViewController;

@end


@implementation MainViewController

@synthesize playerViewController = _playerViewController;
@synthesize myPlayerViewController = _myPlayerViewController;

- (void)dealloc {
    self.playerViewController = nil;
    self.myPlayerViewController = nil;

    [super dealloc];
}


#pragma mark - View lifecycle

-(void)buttonEventOne:(id)sender {

    //[[[[UIAlertView alloc] initWithTitle:@"CONTENT ONE" message:@"This will link to content one video" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease] show];


    NSURL *urlTwo = [[NSBundle mainBundle] URLForResource:@"BAE_BG_anim_pt2_748" withExtension:@"mov"];
    MPMoviePlayerController *playerViewController = [[MPMoviePlayerController alloc] init];

    playerViewController.contentURL = urlTwo;
    playerViewController.view.frame = CGRectMake(0, 0, 1024, 768);
    playerViewController.controlStyle = MPMovieControlStyleNone;
    //playerViewController.repeatMode = MPMovieRepeatModeOne;

    [self.view addSubview:playerViewController.view];
    [playerViewController play];

    self.playerViewController = playerViewController;
    [playerViewController release];


}

-(void)buttonEventTwo:(id)sender {

    [[[[UIAlertView alloc] initWithTitle:@"CONTENT TWO" message:@"This will link to content one video" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease] show];
}

-(void)buttonEventThree:(id)sender {

    [[[[UIAlertView alloc] initWithTitle:@"CONTENT THREE" message:@"This will link to content one video" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil] autorelease] show];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURL *url = [[NSBundle mainBundle] URLForResource:@"BAE_Main_Loop_748" withExtension:@"mov"];

    // video player
    MPMoviePlayerController *playerViewController = [[MPMoviePlayerController alloc] init];
    playerViewController.contentURL = url;
    [playerViewController prepareToPlay];
    playerViewController.view.frame = CGRectMake(0, 0, 1024, 768);
    playerViewController.controlStyle = MPMovieControlStyleNone;
    playerViewController.repeatMode = MPMovieRepeatModeOne;

    [self.view addSubview:playerViewController.view];
    [playerViewController play];

    self.playerViewController = playerViewController;
    [playerViewController release];

    UIButton * btnOne = [UIButton buttonWithType:UIButtonTypeCustom];
    btnOne.frame = CGRectMake(260, 350, 150, 50);
    [btnOne setTitle:@"" forState:UIControlStateNormal];
    [btnOne addTarget:self action:@selector(buttonEventOne:)forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btnOne];

    UIButton * btnTwo = [UIButton buttonWithType:UIButtonTypeCustom];
    btnTwo.frame = CGRectMake(620, 350, 150, 50);
    [btnTwo setTitle:@"" forState:UIControlStateNormal];
    [btnTwo addTarget:self action:@selector(buttonEventTwo:)forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btnTwo];

    UIButton * btnThree = [UIButton buttonWithType:UIButtonTypeCustom];
    btnThree.frame = CGRectMake(450, 250, 150, 50);
    [btnThree setTitle:@"" forState:UIControlStateNormal];
    [btnThree addTarget:self action:@selector(buttonEventThree:)forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btnThree];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || 
            interfaceOrientation == UIInterfaceOrientationLandscapeRight);
} 
@end

Answer 1

您是否尝试过注册播放通知，特别是MPMoviePlayerPlaybackDidFinishNotification，引人注目？如果您在按下按钮时注册通知：

[[NSNotificationCenter defaultCenter] 
  addObserver:self 
  selector:@selector(introMovieFinished:) 
  name:MPMoviePlayerPlaybackDidFinishNotification 
  object:self.playerViewController];

然后在那个功能中：

- (void)introMovieFinished:(NSNotification*)note {
  [[NSNotificationCenter defaultCenter] 
    removeObserver:self 
    name:MPMoviePlayerPlaybackDidFinishNotification
    object:self.playerViewController];
  // Do stuff.
}

您取消注册您对通知的兴趣，然后开始播放下一部电影。因为您只在按下按钮时注册了兴趣，所以在电影结束之前不应该接收函数调用。

使用MPMoviePlayerController在ipad上使用1024x768

1 个答案: