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【原创】苹果内置录屏SDK-ReplayKit库的使用说明

1 iOS ReplayKit 录屏SDK 说明（按照苹果官方的说法是App端加入这些苹果的新特性新SDK更容易被苹果推荐）

ReplayKit是苹果在iOS9上面提供的一个库组件，可以让玩家在游戏中录制游戏视频，并且可以添加语音评论，然后通过社交网络分享出去。

2库的特性说明

要使用ReplayKit需要在工程的Build Phase的Link binary with libraries中加入ReplayKit.framework.
目前这个库只支持真机允许，不支持模拟器。
系统版本如果低于iOS9也不支持。
还有这个库支持游戏录屏，但不支持录avplayer播放的视频，这个可能是为了保护视频的版权，避免影视资源被复制拷贝。

视频录制完成之后可以调用ReplayKit的接口显示视频预览页面，对应的接口是返回一个页面的ViewController，至于如何显示这个页面，各个客户端可以自由处理，Demo中只是给了其中一种实现方法。

3库的潜在问题

经过实验，发现ReplayKit有如下情况：

录制的启动初始化有时很慢，有见过几十秒才初始化完成的，也碰见过初始化没有成功的。
录制调用了停止接口后系统还会继续录制多几秒的视频。
出现过录制结果为黑屏的情况。
还有这个录屏SDK支付使用麦克风，即是可以一边录制游戏，一边用麦克风讲解。

4Demo说明

附件是Demo的工程，使用Xcode7编译之后可以运行起来（不支持Xcode6，Xcode6没有ReplayKit这个库）

连接iPhone或者iPad之后可以编译并运行这个工程，在真机上运行后可以看到如下界面。

参见附件图片

点击开始按钮后就会调用开始录屏的接口，但这个时候不是马上进行录屏，ReplayKit需要初始化完成开自动开始录屏，所以Demo加了一个Loading提示“初始化”
初始化完成后结束按钮变为可以点击的状态，并提示 “正在录制”
等要结束时点击结束按钮，会调用ReplayKit的停止接口，停止接口给了回调后可以显示录屏视频的预览页面，至于要不要显示和如何显示，由各个游戏的前端确定，Demo只是给了个参考的例子。
在视频预览页面可以选择保存到系统相册或者分享到社交网络，还可以拷贝到剪切板，这些操作都可以在回调中获取到，游戏前端可以根据这些回调的信息给用户提示（比如“视频成功保存到系统相册”）

>> 系统默认的分享暂时是看到Facebook Youtube这些，并没有看到有微信微博分享。不过这些视频保存到系统相册之后可以上传到优酷，后续生成链接并分享出去的还没有测试过。
Demo中的时间和进度条只是模拟了游戏中的动画，不然只有静止画面，看不出视频的效果。

其他：Demo中的函数都附带了注释说明，可以自由修改并自由分发。

5官网说明

ReplayKit的官网使用说明 https://developer.apple.com/library/ios/documentation/ReplayKit/Reference/ReplayKit_Collection/index.html#//apple_ref/doc/uid/TP40016260;

Demo代码：

  1 #import "ViewController.h"
  2 #import <ReplayKit/ReplayKit.h>
  3 
  4 static NSString *StartRecord = @"开始";
  5 static NSString *StopRecord = @"结束";
  6 
  7 #if TARGET_IPHONE_SIMULATOR
  8 #define SIMULATOR 1
  9 #elif TARGET_OS_IPHONE
 10 #define SIMULATOR 0
 11 #endif
 12 
 13 #define AnimationDuration (0.3)
 14 
 15 
 16 @interface ViewController () <RPPreviewViewControllerDelegate>
 17 {
 18     
 19 }
 20 @property (nonatomic, strong)UIButton *btnStart;
 21 @property (nonatomic, strong)UIButton *btnStop;
 22 @property (nonatomic, strong)NSTimer *progressTimer;
 23 @property (nonatomic, strong)UIProgressView *progressView;
 24 @property (nonatomic, strong)UIActivityIndicatorView *activity;
 25 @property (nonatomic, strong)UIView *tipView;
 26 @property (nonatomic, strong)UILabel *lbTip;
 27 @property (nonatomic, strong)UILabel *lbTime;
 28 
 29 @end
 30 
 31 @implementation ViewController
 32 
 33 - (void)viewDidLoad {
 34     [super viewDidLoad];
 35     // Do any additional setup after loading the view, typically from a nib.
 36     
 37 }
 38 
 39 - (void)viewDidAppear:(BOOL)animated {
 40     BOOL isVersionOk = [self isSystemVersionOk];
 41     
 42     if (!isVersionOk) {
 43         NSLog(@"系统版本需要是iOS9.0及以上才支持ReplayKit");
 44         return;
 45     }
 46     if (SIMULATOR) {
 47         [self showSimulatorWarning];
 48         return;
 49     }
 50     
 51     UILabel *lb = nil;
 52     CGSize screenSize = [UIScreen mainScreen].bounds.size;
 53     
 54     
 55     //标题
 56     lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 140)];
 57     lb.font = [UIFont boldSystemFontOfSize:32];
 58     lb.backgroundColor = [UIColor clearColor];
 59     lb.textColor = [UIColor blackColor];
 60     lb.textAlignment = NSTextAlignmentCenter;
 61     lb.numberOfLines = 3;
 62     lb.text = @"苹果ReplayKit Demo";
 63     lb.center =  CGPointMake(screenSize.width/2, 80);
 64     [self.view addSubview:lb];
 65     
 66     //创建按钮
 67     UIButton *btn = [self createButtonWithTitle:StartRecord andCenter:CGPointMake(screenSize.width/2 - 100, 200)];
 68     [self.view addSubview:btn];
 69     self.btnStart = btn;
 70     
 71     btn = [self createButtonWithTitle:StopRecord andCenter:CGPointMake(screenSize.width/2 + 100, 200)];
 72     [self.view addSubview:btn];
 73     self.btnStop = btn;
 74     [self setButton:btn enabled:NO];
 75     
 76     //loading指示
 77     UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
 78     UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 280, 80)];
 79     [self.view addSubview:view];
 80     view.backgroundColor = [UIColor redColor];
 81     view.layer.cornerRadius = 8.0f;
 82     view.center = CGPointMake(screenSize.width/2, 300);
 83     activity.center = CGPointMake(30, view.frame.size.height/2);
 84     [view addSubview:activity];
 85     [activity startAnimating];
 86     self.activity = activity;
 87     lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 280, 80)];
 88     lb.font = [UIFont boldSystemFontOfSize:20];
 89     lb.backgroundColor = [UIColor clearColor];
 90     lb.textColor = [UIColor blackColor];
 91     lb.layer.cornerRadius = 4.0;
 92     lb.textAlignment = NSTextAlignmentCenter;
 93     [view addSubview:lb];
 94     self.lbTip = lb;
 95     self.tipView = view;
 96     [self hideTip];
 97     
 98     
 99     //显示时间（用于看录制结果时能知道时间）
100     lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
101     lb.font = [UIFont boldSystemFontOfSize:20];
102     lb.backgroundColor = [UIColor redColor];
103     lb.textColor = [UIColor blackColor];
104     lb.layer.cornerRadius = 4.0;
105     NSDateFormatter * dateFormat = [[NSDateFormatter alloc] init] ;
106     [dateFormat setDateFormat: @"HH:mm:ss"];
107     NSString *dateString = [dateFormat stringFromDate:[NSDate date]];
108     lb.text =  dateString;
109     lb.center = CGPointMake(screenSize.width/2, screenSize.height/2 + 100);
110     lb.textAlignment = NSTextAlignmentCenter;
111     [self.view addSubview:lb];
112     self.lbTime = lb;
113     
114     //进度条 （显示动画，不然看不出画面的变化）
115     UIProgressView *progress = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 0, screenSize.width*0.8, 10)];
116     progress.center = CGPointMake(screenSize.width/2, screenSize.height/2 + 150);
117     progress.progressViewStyle = UIProgressViewStyleDefault;
118     progress.progress = 0.0;
119     [self.view addSubview:progress];
120     self.progressView = progress;
121     
122     //计时器
123     //更新时间
124     [NSTimer scheduledTimerWithTimeInterval:1.0f
125                                      target:self
126                                    selector:@selector(updateTimeString)
127                                    userInfo:nil
128                                     repeats:YES];
129 }
130 
131 #pragma mark - UI控件
132 //显示 提示信息
133 - (void)showTipWithText:(NSString *)tip activity:(BOOL)activity{
134     [self.activity startAnimating];
135     self.lbTip.text = tip;
136     self.tipView.hidden = NO;
137     if (activity) {
138         self.activity.hidden = NO;
139         [self.activity startAnimating];
140     } else {
141         [self.activity stopAnimating];
142         self.activity.hidden = YES;
143     }
144 }
145 //隐藏 提示信息
146 - (void)hideTip {
147     self.tipView.hidden = YES;
148     [self.activity stopAnimating];
149 }
150 
151 //创建按钮
152 - (UIButton *)createButtonWithTitle:(NSString *)title andCenter:(CGPoint)center {
153 
154     CGRect rect = CGRectMake(0, 0, 160, 60);
155     UIButton *btn = [[UIButton alloc] initWithFrame:rect];
156     btn.layer.cornerRadius = 5.0;
157     btn.layer.borderWidth = 2.0;
158     btn.layer.borderColor = [[UIColor blackColor] CGColor];
159     btn.backgroundColor = [UIColor lightGrayColor];
160     btn.center = center;
161     [btn setTitle:title forState:UIControlStateNormal];
162     [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
163     [btn addTarget:self action:@selector(onBtnPressed:) forControlEvents:UIControlEventTouchDown];
164     return btn;
165     
166 }
167 
168 //设置按钮是否可点击
169 - (void)setButton:(UIButton *)button enabled:(BOOL)enabled {
170     if (enabled) {
171         button.alpha = 1.0;
172     } else {
173         button.alpha = 0.2;
174     }
175     button.enabled = enabled;
176 }
177 
178 //提示不支持模拟器
179 - (void)showSimulatorWarning {
180     UIAlertAction *actionOK = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
181         
182     }];
183     UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action){
184         
185     }];
186     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];
187     [alert addAction:actionCancel];
188     [alert addAction:actionOK];
189     
190     [self presentViewController:alert animated:NO completion:nil];
191 }
192 
193 //显示弹框提示
194 - (void)showAlert:(NSString *)title andMessage:(NSString *)message {
195     if (!title) {
196         title = @"";
197     }
198     if (!message) {
199         message = @"";
200     }
201     UIAlertAction *actionCancel = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleCancel handler:nil];
202     UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
203     [alert addAction:actionCancel];
204     [self presentViewController:alert animated:NO completion:nil];
205 }
206 
207 //显示视频预览页面，animation=是否要动画显示
208 - (void)showVideoPreviewController:(RPPreviewViewController *)previewController withAnimation:(BOOL)animation {
209     
210     __weak ViewController *weakSelf = self;
211     
212     //UI需要放到主线程
213     dispatch_async(dispatch_get_main_queue(), ^{
214         
215         CGRect rect = [UIScreen mainScreen].bounds;
216         
217         if (animation) {
218             
219             rect.origin.x += rect.size.width;
220             previewController.view.frame = rect;
221             rect.origin.x -= rect.size.width;
222             [UIView animateWithDuration:AnimationDuration animations:^(){
223                 previewController.view.frame = rect;
224             } completion:^(BOOL finished){
225                 
226             }];
227             
228         } else {
229             previewController.view.frame = rect;
230         }
231         
232         [weakSelf.view addSubview:previewController.view];
233         [weakSelf addChildViewController:previewController];
234         
235         
236     });
237     
238 }
239 
240 //关闭视频预览页面，animation=是否要动画显示
241 - (void)hideVideoPreviewController:(RPPreviewViewController *)previewController withAnimation:(BOOL)animation {
242     
243     //UI需要放到主线程
244     dispatch_async(dispatch_get_main_queue(), ^{
245         
246         CGRect rect = previewController.view.frame;
247         
248         if (animation) {
249             
250             rect.origin.x += rect.size.width;
251             [UIView animateWithDuration:AnimationDuration animations:^(){
252                 previewController.view.frame = rect;
253             } completion:^(BOOL finished){
254                 //移除页面
255                 [previewController.view removeFromSuperview];
256                 [previewController removeFromParentViewController];
257             }];
258             
259         } else {
260             //移除页面
261             [previewController.view removeFromSuperview];
262             [previewController removeFromParentViewController];
263         }
264     });
265 }
266 
267 #pragma mark - 按钮 回调
268 //按钮事件
269 - (void)onBtnPressed:(UIButton *)sender {
270     
271     //点击效果
272     sender.transform = CGAffineTransformMakeScale(0.8, 0.8);
273     float duration = 0.3;
274     [UIView animateWithDuration:duration
275                      animations:^{
276                          sender.transform = CGAffineTransformMakeScale(1.1, 1.1);
277                      }completion:^(BOOL finish){
278                          [UIView animateWithDuration:duration
279                                           animations:^{
280                                               sender.transform = CGAffineTransformMakeScale(1.0, 1.0);
281                                           }completion:^(BOOL finish){ }];
282                      }];
283     
284     NSString *function = sender.titleLabel.text;
285     if ([function isEqualToString:StartRecord]) {
286         [self startRecord];
287     }
288     else if ([function isEqualToString:StopRecord]) {
289         [self stopRecord];
290     }
291 }
292 
293 
294 - (void)startRecord {
295     
296     //    [self setButton:self.btnStart enabled:NO];
297     
298     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");
299     NSLog(@"检查机器和版本是否支持ReplayKit录制...");
300     if ([[RPScreenRecorder sharedRecorder] isAvailable]) {
301         NSLog(@"支持ReplayKit录制");
302     } else {
303         NSLog(@"!!不支持支持ReplayKit录制!!");
304         return;
305     }
306     
307     __weak ViewController *weakSelf = self;
308     
309     NSLog(@"%@ 录制", StartRecord);
310     [self showTipWithText:@"录制初始化" activity:YES];
311 
312     //在此可以设置是否允许麦克风（传YES即是使用麦克风，传NO则不是用麦克风）
313     [[RPScreenRecorder sharedRecorder] startRecordingWithMicrophoneEnabled:NO handler:^(NSError *error){
314         NSLog(@"录制开始...");
315         [weakSelf hideTip];
316         if (error) {
317             NSLog(@"错误信息 %@", error);
318             [weakSelf showTipWithText:error.description activity:NO];
319         } else {
320             //其他处理
321             [weakSelf setButton:self.btnStop enabled:YES];
322             [weakSelf setButton:self.btnStart enabled:NO];
323             
324             [weakSelf showTipWithText:@"正在录制" activity:NO];
325             //更新进度条
326             weakSelf.progressTimer = [NSTimer scheduledTimerWithTimeInterval:0.05f
327                                                                       target:self
328                                                                     selector:@selector(changeProgressValue)
329                                                                     userInfo:nil
330                                                                      repeats:YES];
331         }
332     }];
333 }
334 
335 - (void)stopRecord {
336     NSLog(@"%@ 录制", StopRecord);
337     
338     [self setButton:self.btnStart enabled:YES];
339     [self setButton:self.btnStop enabled:NO];
340     
341     __weak ViewController *weakSelf = self;
342     [[RPScreenRecorder sharedRecorder] stopRecordingWithHandler:^(RPPreviewViewController *previewViewController, NSError *  error){
343         
344         
345         if (error) {
346             NSLog(@"失败消息:%@", error);
347             [weakSelf showTipWithText:error.description activity:NO];
348         } else {
349             
350             [weakSelf showTipWithText:@"录制完成" activity:NO];
351             
352             //显示录制到的视频的预览页
353             NSLog(@"显示预览页面");
354             previewViewController.previewControllerDelegate = weakSelf;
355             
356             //去除计时器
357             [weakSelf.progressTimer invalidate];
358             weakSelf.progressTimer = nil;
359             
360             [self showVideoPreviewController:previewViewController withAnimation:YES];
361         }
362     }];
363 }
364 
365 #pragma mark - 视频预览页面 回调
366 //关闭的回调
367 - (void)previewControllerDidFinish:(RPPreviewViewController *)previewController {
368     [self hideVideoPreviewController:previewController withAnimation:YES];
369 }
370 
371 //选择了某些功能的回调（如分享和保存）
372 - (void)previewController:(RPPreviewViewController *)previewController didFinishWithActivityTypes:(NSSet <NSString *> *)activityTypes {
373     
374     __weak ViewController *weakSelf = self;
375     if ([activityTypes containsObject:@"com.apple.UIKit.activity.SaveToCameraRoll"]) {
376         
377         dispatch_async(dispatch_get_main_queue(), ^{
378             [weakSelf showAlert:@"保存成功" andMessage:@"已经保存到系统相册"];
379         });
380     }
381     if ([activityTypes containsObject:@"com.apple.UIKit.activity.CopyToPasteboard"]) {
382         dispatch_async(dispatch_get_main_queue(), ^{
383             [weakSelf showAlert:@"复制成功" andMessage:@"已经复制到粘贴板"];
384         });
385     }
386 }
387 
388 #pragma mark - 计时器 回调
389 
390 //改变进度条的显示的进度
391 - (void)changeProgressValue {
392     float progress = self.progressView.progress + 0.01;
393     [self.progressView setProgress:progress animated:NO];
394     if (progress >= 1.0) {
395         self.progressView.progress = 0.0;
396     }
397 }
398 //更新显示的时间
399 - (void)updateTimeString {
400     NSDateFormatter * dateFormat = [[NSDateFormatter alloc] init] ;
401     [dateFormat setDateFormat: @"HH:mm:ss"];
402     NSString *dateString = [dateFormat stringFromDate:[NSDate date]];
403     self.lbTime.text =  dateString;
404 }
405 
406 #pragma mark - 其他
407 - (void)didReceiveMemoryWarning {
408     [super didReceiveMemoryWarning];
409     // Dispose of any resources that can be recreated.
410 }
411 
412 //判断对应系统版本是否支持ReplayKit
413 - (BOOL)isSystemVersionOk {
414     if ([[UIDevice currentDevice].systemVersion floatValue] < 9.0) {
415         return NO;
416     } else {
417         return YES;
418     }
419 }
420 
421 @end

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