iphone - 我的应用程序启动后如何自动播放音乐？

Question

我需要一些关于我最近启动的应用程序的帮助。我是编码的一个非常重要的初学者，所以请帮助我，这将意味着很多。用户进入我的应用程序后，我需要播放一段音乐，我遵循了其他 youtube 教程，但它们仅适用于较旧的 Xcode 版本，因此非常感谢您。

Answer 1

把它放在你身上怎么样，application didFinishLaunching但一定要在你的.h和.m中实例化它。

这样的事情应该可以解决您的问题：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    NSString* resourcePath = [[NSBundle mainBundle] resourcePath];
    resourcePath = [resourcePath stringByAppendingString:@"/YOURMUSICNAME.wav"];
    NSLog(@"Path to play: %@", resourcePath);
    NSError* err;

    //Initialize our player pointing to the path to our resource
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:
                 [NSURL fileURLWithPath:resourcePath] error:&err];

    if( err ){
        //bail!
        NSLog(@"Failed with reason: %@", [err localizedDescription]);
    }
    else{
        //set our delegate and begin playback
        player.delegate = self;
        [player play];
        player.numberOfLoops = -1;
        player.currentTime = 0;
        player.volume = 1.0;
    }
}

然后，如果你想停止它：

[player stop];

或暂停：

[player pause];

并将其导入您的头文件中：

#import <AVFoundation/AVFoundation.h>

编辑：

您当然应该在标题中声明它，然后合成它。

//.h 并添加粗体部分：

@interface ViewController : UIViewController < AVAudioPlayerDelegate > {

AVAudioPlayer *player;
}
@property (nonatomic, retain) AVAudioPlayer *player;

//.m

@synthesize player;

Answer 2

您可以使用AVAudioPlayer. 使用起来非常简单：

NSURL *path = [[NSURL alloc] initFileURLWithPath:[DataPersister getQualifiedPathForFileInDirectory:DataPersisterPathBundle fileName:@"music.mp3"]];
NSError *outError;

AVAudioPlayer *musicSound = [[AVAudioPlayer alloc] initWithContentsOfURL:path error:&outError];
[musicSound play];
[path release];

记得导入

#import <AVFoundation/AVFoundation.h>

Answer 3

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/MUSIC.mp3", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = -1;
[audioPlayer play];
audioPlayer.volume = 1.0;
audioPlayer.currentTime = 2;

使用这个 at- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法肯定会播放音乐

快乐编码 ;)