主播直播頁(yè)面 LFLiveKit的實(shí)現(xiàn)代碼（github下載） 新功能可參考以下代碼導(dǎo)入 此頁(yè)面為一個(gè)UIView，直接呼上去，呼到實(shí)現(xiàn)直播的Controller上去就可以啦

#import "LFLivePreview.h"
#import "UIControl+YYAdd.h"
#import "UIView+YYAdd.h"
#import "LFLiveKit.h"

inline static NSString *formatedSpeed(float bytes, float elapsed_milli) {
    if (elapsed_milli <= 0) {
        return @"N/A";
    }

    if (bytes <= 0) {
        return @"0 KB/s";
    }

    float bytes_per_sec = ((float)bytes) * 1000.f /  elapsed_milli;
    if (bytes_per_sec >= 1000 * 1000) {
        return [NSString stringWithFormat:@"%.2f MB/s", ((float)bytes_per_sec) / 1000 / 1000];
    } else if (bytes_per_sec >= 1000) {
        return [NSString stringWithFormat:@"%.1f KB/s", ((float)bytes_per_sec) / 1000];
    } else {
        return [NSString stringWithFormat:@"%ld B/s", (long)bytes_per_sec];
    }
}

@interface LFLivePreview ()<LFLiveSessionDelegate>

@property (nonatomic, strong) UIButton *beautyButton;
@property (nonatomic, strong) UIButton *cameraButton;
@property (nonatomic, strong) UIButton *closeButton;
@property (nonatomic, strong) UIButton *startLiveButton;
@property (nonatomic, strong) UIView *containerView;
@property (nonatomic, strong) LFLiveDebug *debugInfo;
@property (nonatomic, strong) LFLiveSession *session;
@property (nonatomic, strong) UILabel *stateLabel;

@end

@implementation LFLivePreview

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor clearColor];
        //獲取Video權(quán)限
        [self requestAccessForVideo];
        //獲取Audio權(quán)限
        [self requestAccessForAudio];
        [self addSubview:self.containerView];
        [self.containerView addSubview:self.stateLabel];
        [self.containerView addSubview:self.closeButton];
        [self.containerView addSubview:self.cameraButton];
        [self.containerView addSubview:self.beautyButton];
        [self.containerView addSubview:self.startLiveButton];
    }
    return self;
}

#pragma mark -- Public Method
- (void)requestAccessForVideo {
    __weak typeof(self) _self = self;
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    switch (status) {
    case AVAuthorizationStatusNotDetermined: {
        // 許可對(duì)話沒有出現(xiàn)伙菜，發(fā)起授權(quán)許可
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                if (granted) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        [_self.session setRunning:YES];
                    });
                }
            }];
        break;
    }
    case AVAuthorizationStatusAuthorized: {
        // 已經(jīng)開啟授權(quán)娜谊，可繼續(xù)
        dispatch_async(dispatch_get_main_queue(), ^{
            [_self.session setRunning:YES];
        });
        break;
    }
    case AVAuthorizationStatusDenied:
    case AVAuthorizationStatusRestricted:
        // 用戶明確地拒絕授權(quán)怀浆，或者相機(jī)設(shè)備無(wú)法訪問

        break;
    default:
        break;
    }
}

- (void)requestAccessForAudio {
    AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];
    switch (status) {
    case AVAuthorizationStatusNotDetermined: {
        [AVCaptureDevice requestAccessForMediaType:AVMediaTypeAudio completionHandler:^(BOOL granted) {
            }];
        break;
    }
    case AVAuthorizationStatusAuthorized: {
        break;
    }
    case AVAuthorizationStatusDenied:
    case AVAuthorizationStatusRestricted:
        break;
    default:
        break;
    }
}

#pragma mark -- LFStreamingSessionDelegate
/** live status changed will callback */
- (void)liveSession:(nullable LFLiveSession *)session liveStateDidChange:(LFLiveState)state {
    NSLog(@"liveStateDidChange: %ld", state);
    switch (state) {
    case LFLiveReady:
        _stateLabel.text = @"未連接";
        break;
    case LFLivePending:
        _stateLabel.text = @"連接中";
        break;
    case LFLiveStart:
        _stateLabel.text = @"已連接";
        break;
    case LFLiveError:
        _stateLabel.text = @"連接錯(cuò)誤";
        break;
    case LFLiveStop:
        _stateLabel.text = @"未連接";
        break;
    default:
        break;
    }
}

/** live debug info callback */
- (void)liveSession:(nullable LFLiveSession *)session debugInfo:(nullable LFLiveDebug *)debugInfo {
    NSLog(@"debugInfo uploadSpeed: %@", formatedSpeed(debugInfo.currentBandwidth, debugInfo.elapsedMilli));
}

/** callback socket errorcode */
- (void)liveSession:(nullable LFLiveSession *)session errorCode:(LFLiveSocketErrorCode)errorCode {
    NSLog(@"errorCode: %ld", errorCode);
}

#pragma mark -- Getter Setter
- (LFLiveSession *)session {
    if (!_session) {
        _session = [[LFLiveSession alloc] initWithAudioConfiguration:[LFLiveAudioConfiguration defaultConfiguration] videoConfiguration:[LFLiveVideoConfiguration defaultConfiguration]];
        _session.preView = self;
        _session.delegate = self;
    }
    return _session;
}

- (UIView *)containerView {
    if (!_containerView) {
        _containerView = [UIView new];
        _containerView.frame = self.bounds;
        _containerView.backgroundColor = [UIColor clearColor];
        _containerView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    }
    return _containerView;
}

- (UILabel *)stateLabel {
    if (!_stateLabel) {
        _stateLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 80, 40)];
        _stateLabel.text = @"未連接";
        _stateLabel.textColor = [UIColor whiteColor];
        _stateLabel.font = [UIFont boldSystemFontOfSize:14.f];
    }
    return _stateLabel;
}

- (UIButton *)closeButton {
    if (!_closeButton) {
        _closeButton = [UIButton new];
        _closeButton.size = CGSizeMake(44, 44);
        _closeButton.left = self.width - 10 - _closeButton.width;
        _closeButton.top = 20;
        [_closeButton setImage:[UIImage imageNamed:@"close_preview"] forState:UIControlStateNormal];
        _closeButton.exclusiveTouch = YES;
        @weakify(self);
        [_closeButton addBlockForControlEvents:UIControlEventTouchUpInside block:^(id sender) {
            @strongify(self);
            [self stopLive];
            [self.viewController dismissViewControllerAnimated:YES completion:nil];

        }];
    }
    return _closeButton;
}

- (UIButton *)cameraButton {
    if (!_cameraButton) {
        _cameraButton = [UIButton new];
        _cameraButton.size = CGSizeMake(44, 44);
        _cameraButton.origin = CGPointMake(_closeButton.left - 10 - _cameraButton.width, 20);
        [_cameraButton setImage:[UIImage imageNamed:@"camra_preview"] forState:UIControlStateNormal];
        _cameraButton.exclusiveTouch = YES;
        __weak typeof(self) _self = self;
        [_cameraButton addBlockForControlEvents:UIControlEventTouchUpInside block:^(id sender) {
            AVCaptureDevicePosition devicePositon = _self.session.captureDevicePosition;
            _self.session.captureDevicePosition = (devicePositon == AVCaptureDevicePositionBack) ? AVCaptureDevicePositionFront : AVCaptureDevicePositionBack;
        }];
    }
    return _cameraButton;
}

- (UIButton *)beautyButton {
    if (!_beautyButton) {
        _beautyButton = [UIButton new];
        _beautyButton.size = CGSizeMake(44, 44);
        _beautyButton.origin = CGPointMake(_cameraButton.left - 10 - _beautyButton.width, 20);
        [_beautyButton setImage:[UIImage imageNamed:@"camra_beauty"] forState:UIControlStateNormal];
        [_beautyButton setImage:[UIImage imageNamed:@"camra_beauty_close"] forState:UIControlStateSelected];
        _beautyButton.exclusiveTouch = YES;
        __weak typeof(self) _self = self;
        [_beautyButton addBlockForControlEvents:UIControlEventTouchUpInside block:^(id sender) {
            _self.session.beautyFace = !_self.session.beautyFace;
            _self.beautyButton.selected = !_self.session.beautyFace;
        }];
    }
    return _beautyButton;
}

- (UIButton *)startLiveButton {
    if (!_startLiveButton) {
        _startLiveButton = [UIButton new];
        _startLiveButton.size = CGSizeMake(self.width - 60, 44);
        _startLiveButton.left = 30;
        _startLiveButton.bottom = self.height - 50;
        _startLiveButton.layer.cornerRadius = _startLiveButton.height/2;
        [_startLiveButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [_startLiveButton.titleLabel setFont:[UIFont systemFontOfSize:16]];
        [_startLiveButton setTitle:@"開始直播" forState:UIControlStateNormal];
        [_startLiveButton setBackgroundColor:[UIColor colorWithRed:50 green:32 blue:245 alpha:1]];
        _startLiveButton.exclusiveTouch = YES;
        __weak typeof(self) _self = self;
        [_startLiveButton addBlockForControlEvents:UIControlEventTouchUpInside block:^(id sender) {
            //開始直播的回調(diào)
            _self.startLiveButton.selected = !_self.startLiveButton.selected;
            if (_self.startLiveButton.selected) {
                [_self.startLiveButton setTitle:@"結(jié)束直播" forState:UIControlStateNormal];
                LFLiveStreamInfo *stream = [LFLiveStreamInfo new];
                //RTMP   your server rtmp url
                stream.url = @"rtmp://live.hkstv.hk.lxdns.com:1935/live/wwMark";
                [_self.session startLive:stream];
            } else {
                [_self.startLiveButton setTitle:@"開始直播" forState:UIControlStateNormal];
                [_self.session stopLive];
            }
        }];
    }
    return _startLiveButton;
}
- (void)stopLive {
    [self.session stopLive];
}
@end