iOS开发基础107-iOS直播

在 iOS 平台上，直播技术已经很成熟，有许多强大的第三方框架可以帮助开发者轻松实现直播功能。当前主流的直播第三方框架包括但不限于：

LFLiveKit：一款开源的直播推流 SDK。
PLMediaStreamingKit：由云天存提供的一站式音视频解决方案。
AliyunPlayer：阿里云提供的音视频播放解决方案。
Agora SDK：声网提供的大规模实时视频通讯解决方案。

以下将详细介绍 LFLiveKit 和 PLMediaStreamingKit 的使用，并给出相应的示例代码。

一、LFLiveKit

1. LFLiveKit 安装

要使用 LFLiveKit 首先需要通过 CocoaPods 添加到你的项目。

在你的 Podfile 文件中添加如下内容：

pod 'LFLiveKit'

然后运行 pod install。

2. 配置和使用

Import LFLiveKit 的头文件:

#import <LFLiveKit/LFLiveKit.h>

创建直播会话

LFLiveKit 提供了多种配置选项。首先，你需要创建一个 LFLiveSession，这是 LFLiveKit 的核心类，负责管理音视频捕获和推流处理。

- (LFLiveSession*)liveSession {
    if (!_liveSession) {
        // 自定义音频和视频配置
        LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration defaultConfiguration];
        LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration defaultConfiguration];
        
        _liveSession = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration];
        _liveSession.delegate = self;
        _liveSession.preView = self.view; // 设置预览视图
    }
    return _liveSession;
}

请求权限

在 iOS 开发中，需要请求相机和麦克风权限。以下是请求权限代码：

- (void)requestAccessForVideo {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.liveSession setRunning:YES];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.liveSession setRunning:YES];
    }
}

- (void)requestAccessForAudio {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.liveSession setRunning:YES];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.liveSession setRunning:YES];
    }
}

开始直播

配置完 LFLiveStreamInfo 对象，并调用 startLive: 方法开始直播。

- (void)startLive {
    LFLiveStreamInfo *streamInfo = [LFLiveStreamInfo new];
    streamInfo.url = @"rtmp://your_server/live_stream";
    [self.liveSession startLive:streamInfo];
}

- (void)stopLive {
    [self.liveSession stopLive];
}

处理直播状态变化

通过实现 LFLiveSessionDelegate，可以监测广播的状态变更。

- (void)liveSession:(LFLiveSession *)session liveStateDidChange:(LFLiveState)state {
    switch (state) {
        // 在每个状态变化时的对应处理
        case LFLiveReady:
            NSLog(@"Ready to start live streaming");
            break;
        case LFLivePending:
            NSLog(@"Connecting...");
            break;
        case LFLiveStart:
            NSLog(@"Live streaming started");
            break;
        case LFLiveStop:
            NSLog(@"Live streaming stopped");
            break;
        case LFLiveError:
            NSLog(@"Live streaming error");
            break;
        case LFLiveRefresh:
            NSLog(@"Live streaming refreshing");
            break;
    }
}

完整示例：

完整的 ViewController.m 看起来如下：

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

@interface ViewController () <LFLiveSessionDelegate>
@property (nonatomic, strong) LFLiveSession *liveSession;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self requestAccessForVideo];
    [self requestAccessForAudio];
    [self startLive];
}

- (LFLiveSession*)liveSession {
    if (!_liveSession) {
        LFLiveAudioConfiguration *audioConfiguration = [LFLiveAudioConfiguration defaultConfiguration];
        LFLiveVideoConfiguration *videoConfiguration = [LFLiveVideoConfiguration defaultConfiguration];
        
        _liveSession = [[LFLiveSession alloc] initWithAudioConfiguration:audioConfiguration videoConfiguration:videoConfiguration];
        _liveSession.delegate = self;
        _liveSession.preView = self.view;
    }
    return _liveSession;
}

- (void)requestAccessForVideo {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.liveSession setRunning:YES];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.liveSession setRunning:YES];
    }
}

- (void)requestAccessForAudio {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.liveSession setRunning:YES];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.liveSession setRunning:YES];
    }
}

- (void)startLive {
    LFLiveStreamInfo *streamInfo = [LFLiveStreamInfo new];
    streamInfo.url = @"rtmp://your_server/live_stream";
    [self.liveSession startLive:streamInfo];
}

- (void)stopLive {
    [self.liveSession stopLive];
}

- (void)liveSession:(LFLiveSession *)session liveStateDidChange:(LFLiveState)state {
    switch (state) {
        case LFLiveReady:
            NSLog(@"Ready to start live streaming");
            break;
        case LFLivePending:
            NSLog(@"Connecting...");
            break;
        case LFLiveStart:
            NSLog(@"Live streaming started");
            break;
        case LFLiveStop:
            NSLog(@"Live streaming stopped");
            break;
        case LFLiveError:
            NSLog(@"Live streaming error");
            break;
        case LFLiveRefresh:
            NSLog(@"Live streaming refreshing");
            break;
    }
}
@end

二、PLMediaStreamingKit

1. PLMediaStreamingKit 安装

使用 CocoaPods 安装：

pod 'PLMediaStreamingKit'

运行 pod install 之后，在项目的任意位置导入 PLMediaStreamingKit：

#import <PLMediaStreamingKit/PLMediaStreamingKit.h>

2. 配置和使用

创建推流会话

PLMediaStreamingSession 是此框架的核心类，用于音视频捕获、编码和推流。

- (PLMediaStreamingSession *)streamingSession {
    if (!_streamingSession) {
        PLVideoCaptureConfiguration *videoConfiguration = [PLVideoCaptureConfiguration defaultConfiguration];
        PLAudioCaptureConfiguration *audioConfiguration = [PLAudioCaptureConfiguration defaultConfiguration];
        
        PLVideoStreamingConfiguration *videoStreamingConfiguration = [PLVideoStreamingConfiguration defaultConfiguration];
        PLAudioStreamingConfiguration *audioStreamingConfiguration = [PLAudioStreamingConfiguration defaultConfiguration];
        
        _streamingSession = [[PLMediaStreamingSession alloc] initWithVideoCaptureConfiguration:videoConfiguration
                                                           audioCaptureConfiguration:audioConfiguration
                                                        videoStreamingConfiguration:videoStreamingConfiguration
                                                       audioStreamingConfiguration:audioStreamingConfiguration];
        
        _streamingSession.delegate = self;
        _streamingSession.previewView = self.view;
    }
    return _streamingSession;
}

检查并请求权限

和 LFLiveKit 类似，我们需要请求相机和麦克风的权限：

- (void)requestAccessForVideo {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.streamingSession startCaptureSession];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.streamingSession startCaptureSession];
    }
}

- (void)requestAccessForAudio {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.streamingSession startCaptureSession];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.streamingSession startCaptureSession];
    }
}

开始直播

创建一个 PLStream 对象，包含推流的 URL 和其他配置信息，并启动推流。

- (void)startStreaming {
    PLStream *stream = [PLStream new];
    stream.url = @"rtmp://your_server/live_stream";
    
    [self.streamingSession startWithStream:stream feedback:^(PLStreamStartStateFeedback *feedback) {
        if (feedback.state == PLStreamStartStateSuccess) {
            NSLog(@"Streaming Started Successfully");
        } else {
            NSLog(@"Failed to start streaming: %@", feedback.error.localizedDescription);
        }
    }];
}

- (void)stopStreaming {
    [self.streamingSession stop];
}

处理推流状态变化

通过实现 PLMediaStreamingSessionDelegate 的相关方法，可以监测推流状态的变化。

- (void)mediaStreamingSession:(PLMediaStreamingSession *)session streamStatusDidUpdate:(PLStreamStatus *)status {
    NSLog(@"Stream status: %@", status);
}

- (void)mediaStreamingSession:(PLMediaStreamingSession *)session didDisconnectWithError:(NSError *)error {
    NSLog(@"Stream disconnected with error: %@", error.localizedDescription);
}

完整示例：

完整的 ViewController.m 可以如下：

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

@interface ViewController () <PLMediaStreamingSessionDelegate>
@property (nonatomic, strong) PLMediaStreamingSession *streamingSession;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self requestAccessForVideo];
    [self requestAccessForAudio];
}

- (PLMediaStreamingSession *)streamingSession {
    if (!_streamingSession) {
        PLVideoCaptureConfiguration *videoConfiguration = [PLVideoCaptureConfiguration defaultConfiguration];
        PLAudioCaptureConfiguration *audioConfiguration = [PLAudioCaptureConfiguration defaultConfiguration];
        
        PLVideoStreamingConfiguration *videoStreamingConfiguration = [PLVideoStreamingConfiguration defaultConfiguration];
        PLAudioStreamingConfiguration *audioStreamingConfiguration = [PLAudioStreamingConfiguration defaultConfiguration];
        
        _streamingSession = [[PLMediaStreamingSession alloc] initWithVideoCaptureConfiguration:videoConfiguration
                                                                   audioCaptureConfiguration:audioConfiguration
                                                            videoStreamingConfiguration:videoStreamingConfiguration
                                                           audioStreamingConfiguration:audioStreamingConfiguration
                                                                                 stream:nil];
        
        _streamingSession.delegate = self;
        _streamingSession.previewView = self.view;
    }
    return _streamingSession;
}

- (void)requestAccessForVideo {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.streamingSession startCaptureSession];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.streamingSession startCaptureSession];
    }
}

- (void)requestAccessForAudio {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    if (status == AVAuthorizationStatusNotDetermined) {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
            if (granted) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [self.streamingSession startCaptureSession];
                });
            }
        }];
    } else if (status == AVAuthorizationStatusAuthorized) {
        [self.streamingSession startCaptureSession];
    }
}

- (void)startStreaming {
    PLStream *stream = [PLStream new];
    stream.url = @"rtmp://your_server/live_stream";
    
    [self.streamingSession startWithStream:stream feedback:^(PLStreamStartStateFeedback *feedback) {
        if (feedback.state == PLStreamStartStateSuccess) {
            NSLog(@"Streaming Started Successfully");
        } else {
            NSLog(@"Failed to start streaming: %@", feedback.error.localizedDescription);
        }
    }];
}

- (void)stopStreaming {
    [self.streamingSession stop];
}

- (void)mediaStreamingSession:(PLMediaStreamingSession *)session streamStatusDidUpdate:(PLStreamStatus *)status {
    NSLog(@"Stream status: %@", status);
}

- (void)mediaStreamingSession:(PLMediaStreamingSession *)session didDisconnectWithError:(NSError *)error {
    NSLog(@"Stream disconnected with error: %@", error.localizedDescription);
}
@end

posted @ 2024-07-16 18:31 Mr.陳阅读(12) 评论(0) 编辑收藏举报

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iOS开发基础107-iOS直播

一、LFLiveKit

1. LFLiveKit 安装

2. 配置和使用

创建直播会话

请求权限

开始直播

处理直播状态变化

完整示例：

二、PLMediaStreamingKit

1. PLMediaStreamingKit 安装

2. 配置和使用

创建推流会话

检查并请求权限

开始直播

处理推流状态变化

完整示例：

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