Question

我有一个基于WebView的应用程序，它应该在设备锁定或应用程序在后台运行时在后台播放YouTube视频的音频。顺便说一句，该应用程序使用AVFoundation框架来处理所有音频相关的东西。

现在，问题是应用程序在进入后台模式时暂停音频播放（当我锁定设备或我按下主页时），但如果我再次从控制中心播放音频，则音频会继续。我需要的是避免应用程序在输入背景时停止播放。

（请记住，该应用已具备在后台播放音频的功能。）

我的代码：

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

AppDelegate.m

#import "AppDelegate.h"
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>


@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    sleep(9.5);

    NSError *setCategoryErr = nil;
    NSError *activationErr  = nil;
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error:&setCategoryErr];
    [[AVAudioSession sharedInstance] setActive:YES error:&activationErr];

    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}


- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}


- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}


- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}


- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (strong, nonatomic) IBOutlet UIWebView *webView;

@end

ViewController.m

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>


@interface ViewController ()

    @end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Load the url into the webview
    NSURL *url = [NSURL URLWithString:@"http://relaxemy.com"];
    [self.webView loadRequest:[NSURLRequest requestWithURL:url]];
}





- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

我的iOS应用程序在后台播放音频，但是当我按下主页按钮时播放停止

0 个答案: