【iOS】ReplayKit库,iOS原生直播神器

版权声明:本文为博主原创,如需转载请注明出处。

前言

ReplayKit 是WWDC15推出的苹果原生录屏 API。在iOS9的时候主要提供的是录屏,录制完成后可以进行查看、编辑、通过指定方式分享出去。

在WWDC16上新版的 ReplayKit 提出了了 live 功能,简单说就是通过 ReplayKit 可以进行录屏直播。这对于苹果的手游直播行业有着很重要的意义。

首先给出视频地址和API文档

简单测试

弹出可以接收广播的服务列表

新建工程,然后加入ReplayKit.frameword

添加一个按钮,然后按钮点击事件弹出广播服务的列表:

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- (IBAction)displayServiceViewController:(id)sender {
[RPBroadcastActivityViewController loadBroadcastActivityViewControllerWithHandler:^(RPBroadcastActivityViewController * _Nullable broadcastActivityViewController, NSError * _Nullable error) {
broadcastActivityViewController.delegate = self;
[self presentViewController:broadcastActivityViewController animated:YES completion:nil];
}];
}


Mobcrush

所以想要直播的游戏本身添加这样一个逻辑,弹出服务列表即可。而直播软件也只需要注册为直播服务,就可以直播任何支持的游戏,软件。国外最火最先支持的就是示例中左边的Mobcrush,官网,里面有手机游戏Tower Dash的直播,就是使用这个技术实现的,Tower Dash游戏直播页面为 - 这里这里,需要科学上网。

我录制了动态图展示:



动态图中可以看出支持摄像头录制,当然还有麦克风,这些已经满足了日常主播的基本需求。

国内

国内现在映客直播安装就直接有注册为广播服务,所以截图中列表里就有。我还安装了熊猫TV,虎牙直播,虎牙助手,虎牙手游。熊猫TV的主播权限还没有申请下来。虎牙手游貌似使用的也是这个技术,但是实现不一样,虎牙手游直接是在虎牙手游APP内部打开直播,提示成功之后,直接就进入了录屏模式,然后退出返回到手游界面开始游戏就可以。查看了虎牙直播平台,已经有主播使用了iPhone7进行王者荣耀直播,熊猫TV暂时还没有看到用iPhone直播手游的。

WWDC 2016

下面是观看WWDC16 记录的知识片段。

ReplayKit

新特性:

  • Apple TV support
  • Live Broadcasting 直播广播,这个很有用,就是要研究的直播功能
  • 可以记录 Face Time摄像头的内容,增强了麦克风记录API


录播功能

对于录播功能之前就已经有了一个典型的demo,可以直接看下面代码,放进原始功能的第一个viewcontroller里面就Ok了。

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

static NSString *StartRecord = @"开始";
static NSString *StopRecord = @"结束";

#if TARGET_IPHONE_SIMULATOR
#define SIMULATOR 1
#elif TARGET_OS_IPHONE
#define SIMULATOR 0
#endif

#define AnimationDuration (0.3)


@interface ViewController () <RPPreviewViewControllerDelegate>
{

}
@property (nonatomic, strong)UIButton *btnStart;
@property (nonatomic, strong)UIButton *btnStop;
@property (nonatomic, strong)NSTimer *progressTimer;
@property (nonatomic, strong)UIProgressView *progressView;
@property (nonatomic, strong)UIActivityIndicatorView *activity;
@property (nonatomic, strong)UIView *tipView;
@property (nonatomic, strong)UILabel *lbTip;
@property (nonatomic, strong)UILabel *lbTime;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

}

- (void)viewDidAppear:(BOOL)animated {
BOOL isVersionOk = [self isSystemVersionOk];

if (!isVersionOk) {
NSLog(@"系统版本需要是iOS9.0及以上才支持ReplayKit");
return;
}
if (SIMULATOR) {
[self showSimulatorWarning];
return;
}

UILabel *lb = nil;
CGSize screenSize = [UIScreen mainScreen].bounds.size;


//标题
lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 140)];
lb.font = [UIFont boldSystemFontOfSize:32];
lb.backgroundColor = [UIColor clearColor];
lb.textColor = [UIColor blackColor];
lb.textAlignment = NSTextAlignmentCenter;
lb.numberOfLines = 3;
lb.text = @"苹果ReplayKit Demo";
lb.center = CGPointMake(screenSize.width/2, 80);
[self.view addSubview:lb];

//创建按钮
UIButton *btn = [self createButtonWithTitle:StartRecord andCenter:CGPointMake(screenSize.width/2 - 100, 200)];
[self.view addSubview:btn];
self.btnStart = btn;

btn = [self createButtonWithTitle:StopRecord andCenter:CGPointMake(screenSize.width/2 + 100, 200)];
[self.view addSubview:btn];
self.btnStop = btn;
[self setButton:btn enabled:NO];

//loading指示
UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 280, 80)];
[self.view addSubview:view];
view.backgroundColor = [UIColor redColor];
view.layer.cornerRadius = 8.0f;
view.center = CGPointMake(screenSize.width/2, 300);
activity.center = CGPointMake(30, view.frame.size.height/2);
[view addSubview:activity];
[activity startAnimating];
self.activity = activity;
lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 280, 80)];
lb.font = [UIFont boldSystemFontOfSize:20];
lb.backgroundColor = [UIColor clearColor];
lb.textColor = [UIColor blackColor];
lb.layer.cornerRadius = 4.0;
lb.textAlignment = NSTextAlignmentCenter;
[view addSubview:lb];
self.lbTip = lb;
self.tipView = view;
[self hideTip];


//显示时间(用于看录制结果时能知道时间)
lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
lb.font = [UIFont boldSystemFontOfSize:20];
lb.backgroundColor = [UIColor redColor];
lb.textColor = [UIColor blackColor];
lb.layer.cornerRadius = 4.0;
NSDateFormatter * dateFormat = [[NSDateFormatter alloc] init] ;
[dateFormat setDateFormat: @"HH:mm:ss"];
NSString *dateString = [dateFormat stringFromDate:[NSDate date]];
lb.text = dateString;
lb.center = CGPointMake(screenSize.width/2, screenSize.height/2 + 100);
lb.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:lb];
self.lbTime = lb;

//进度条 (显示动画,不然看不出画面的变化)
UIProgressView *progress = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 0, screenSize.width*0.8, 10)];
progress.center = CGPointMake(screenSize.width/2, screenSize.height/2 + 150);
progress.progressViewStyle = UIProgressViewStyleDefault;
progress.progress = 0.0;
[self.view addSubview:progress];
self.progressView = progress;

//计时器
//更新时间
[NSTimer scheduledTimerWithTimeInterval:1.0f
target:self
selector:@selector(updateTimeString)
userInfo:nil
repeats:YES];
}

#pragma mark - UI控件
//显示 提示信息
- (void)showTipWithText:(NSString *)tip activity:(BOOL)activity{
[self.activity startAnimating];
self.lbTip.text = tip;
self.tipView.hidden = NO;
if (activity) {
self.activity.hidden = NO;
[self.activity startAnimating];
} else {
[self.activity stopAnimating];
self.activity.hidden = YES;
}
}
//隐藏 提示信息
- (void)hideTip {
self.tipView.hidden = YES;
[self.activity stopAnimating];
}

//创建按钮
- (UIButton *)createButtonWithTitle:(NSString *)title andCenter:(CGPoint)center {

CGRect rect = CGRectMake(0, 0, 160, 60);
UIButton *btn = [[UIButton alloc] initWithFrame:rect];
btn.layer.cornerRadius = 5.0;
btn.layer.borderWidth = 2.0;
btn.layer.borderColor = [[UIColor blackColor] CGColor];
btn.backgroundColor = [UIColor lightGrayColor];
btn.center = center;
[btn setTitle:title forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn addTarget:self action:@selector(onBtnPressed:) forControlEvents:UIControlEventTouchDown];
return btn;

}

//设置按钮是否可点击
- (void)setButton:(UIButton *)button enabled:(BOOL)enabled {
if (enabled) {
button.alpha = 1.0;
} else {
button.alpha = 0.2;
}
button.enabled = enabled;
}

//提示不支持模拟器
- (void)showSimulatorWarning {
UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){

}];
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action){

}];
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"ReplayKit不支持模拟器" message:@"请使用真机运行这个Demo工程" preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:actionCancel];
[alert addAction:actionOK];

[self presentViewController:alert animated:NO completion:nil];
}

//显示弹框提示
- (void)showAlert:(NSString *)title andMessage:(NSString *)message {
if (!title) {
title = @"";
}
if (!message) {
message = @"";
}
UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleCancel handler:nil];
UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:actionCancel];
[self presentViewController:alert animated:NO completion:nil];
}

//显示视频预览页面,animation=是否要动画显示
- (void)showVideoPreviewController:(RPPreviewViewController *)previewController withAnimation:(BOOL)animation {

__weak ViewController *weakSelf = self;

//UI需要放到主线程
dispatch_async(dispatch_get_main_queue(), ^{

CGRect rect = [UIScreen mainScreen].bounds;

if (animation) {

rect.origin.x += rect.size.width;
previewController.view.frame = rect;
rect.origin.x -= rect.size.width;
[UIView animateWithDuration:AnimationDuration animations:^(){
previewController.view.frame = rect;
} completion:^(BOOL finished){

}];

} else {
previewController.view.frame = rect;
}

[weakSelf.view addSubview:previewController.view];
[weakSelf addChildViewController:previewController];


});

}

//关闭视频预览页面,animation=是否要动画显示
- (void)hideVideoPreviewController:(RPPreviewViewController *)previewController withAnimation:(BOOL)animation {

//UI需要放到主线程
dispatch_async(dispatch_get_main_queue(), ^{

CGRect rect = previewController.view.frame;

if (animation) {

rect.origin.x += rect.size.width;
[UIView animateWithDuration:AnimationDuration animations:^(){
previewController.view.frame = rect;
} completion:^(BOOL finished){
//移除页面
[previewController.view removeFromSuperview];
[previewController removeFromParentViewController];
}];

} else {
//移除页面
[previewController.view removeFromSuperview];
[previewController removeFromParentViewController];
}
});
}

#pragma mark - 按钮 回调
//按钮事件
- (void)onBtnPressed:(UIButton *)sender {

//点击效果
sender.transform = CGAffineTransformMakeScale(0.8, 0.8);
float duration = 0.3;
[UIView animateWithDuration:duration
animations:^{
sender.transform = CGAffineTransformMakeScale(1.1, 1.1);
}completion:^(BOOL finish){
[UIView animateWithDuration:duration
animations:^{
sender.transform = CGAffineTransformMakeScale(1.0, 1.0);
}completion:^(BOOL finish){ }];
}];

NSString *function = sender.titleLabel.text;
if ([function isEqualToString:StartRecord]) {
[self startRecord];
}
else if ([function isEqualToString:StopRecord]) {
[self stopRecord];
}
}


- (void)startRecord {

// [self setButton:self.btnStart enabled:NO];

NSLog(@"ReplayKit只支持真机录屏,支持游戏录屏,不支持录avplayer播放的视频");
NSLog(@"检查机器和版本是否支持ReplayKit录制...");
if ([[RPScreenRecorder sharedRecorder] isAvailable]) {
NSLog(@"支持ReplayKit录制");
} else {
NSLog(@"!!不支持支持ReplayKit录制!!");
return;
}

__weak ViewController *weakSelf = self;

NSLog(@"%@ 录制", StartRecord);
[self showTipWithText:@"录制初始化" activity:YES];


[[RPScreenRecorder sharedRecorder] startRecordingWithHandler:^(NSError *error){
NSLog(@"录制开始...");
[weakSelf hideTip];
if (error) {
NSLog(@"错误信息 %@", error);
[weakSelf showTipWithText:error.description activity:NO];
} else {
//其他处理
[weakSelf setButton:self.btnStop enabled:YES];
[weakSelf setButton:self.btnStart enabled:NO];

[weakSelf showTipWithText:@"正在录制" activity:NO];
//更新进度条
weakSelf.progressTimer = [NSTimer scheduledTimerWithTimeInterval:0.05f
target:self
selector:@selector(changeProgressValue)
userInfo:nil
repeats:YES];
}
}];

}

- (void)stopRecord {
NSLog(@"%@ 录制", StopRecord);

[self setButton:self.btnStart enabled:YES];
[self setButton:self.btnStop enabled:NO];

__weak ViewController *weakSelf = self;
[[RPScreenRecorder sharedRecorder] stopRecordingWithHandler:^(RPPreviewViewController *previewViewController, NSError * error){


if (error) {
NSLog(@"失败消息:%@", error);
[weakSelf showTipWithText:error.description activity:NO];
} else {

[weakSelf showTipWithText:@"录制完成" activity:NO];

//显示录制到的视频的预览页
NSLog(@"显示预览页面");
previewViewController.previewControllerDelegate = weakSelf;

//去除计时器
[weakSelf.progressTimer invalidate];
weakSelf.progressTimer = nil;

[self showVideoPreviewController:previewViewController withAnimation:YES];
}
}];
}

#pragma mark - 视频预览页面 回调
//关闭的回调
- (void)previewControllerDidFinish:(RPPreviewViewController *)previewController {
[self hideVideoPreviewController:previewController withAnimation:YES];
}

//选择了某些功能的回调(如分享和保存)
- (void)previewController:(RPPreviewViewController *)previewController didFinishWithActivityTypes:(NSSet <NSString *> *)activityTypes {

__weak ViewController *weakSelf = self;
if ([activityTypes containsObject:@"com.apple.UIKit.activity.SaveToCameraRoll"]) {

dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf showAlert:@"保存成功" andMessage:@"已经保存到系统相册"];
});
}
if ([activityTypes containsObject:@"com.apple.UIKit.activity.CopyToPasteboard"]) {
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf showAlert:@"复制成功" andMessage:@"已经复制到粘贴板"];
});
}
}

#pragma mark - 计时器 回调

//改变进度条的显示的进度
- (void)changeProgressValue {
float progress = self.progressView.progress + 0.01;
[self.progressView setProgress:progress animated:NO];
if (progress >= 1.0) {
self.progressView.progress = 0.0;
}
}

//更新显示的时间
- (void)updateTimeString {
NSDateFormatter * dateFormat = [[NSDateFormatter alloc] init] ;
[dateFormat setDateFormat: @"HH:mm:ss"];
NSString *dateString = [dateFormat stringFromDate:[NSDate date]];
self.lbTime.text = dateString;
}

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

//判断对应系统版本是否支持ReplayKit
- (BOOL)isSystemVersionOk {
if ([[UIDevice currentDevice].systemVersion floatValue] < 9.0) {
return NO;
} else {
return YES;
}
}

@end

新博客文章地址:ReplayKit库,iOS原生直播神器
CSDN文章地址:ReplayKit库,iOS原生直播神器

文章目录
  1. 1. 前言
  2. 2. 简单测试
    1. 2.1. 弹出可以接收广播的服务列表
    2. 2.2. Mobcrush
    3. 2.3. 国内
  3. 3. WWDC 2016
    1. 3.1. ReplayKit
  4. 4. 录播功能