iOS 录制屏幕

思路1:http://blog.sina.com.cn/s/blog_6d64a8df01018i5n.html

思路总结：http://www.jianshu.com/p/be8040eb4106

录制屏幕操作，同时录制声音，合成视频存入相册：
https://github.com/Blazeice/ScreenAndAudioRecordDemoScreenAndAudioRecordDemo

本人在项目中先用ReplayKit实现了录屏幕逻辑，根据https://github.com/cdpenggod/CDPReplay
项目改动而来，多谢作者
录制代码奉上

//
//  ULCDPReplay.h
//  UXLive
//
//  Created by zhangxiwei on 2017/6/20.
//  Copyright © 2017年 UXIN CO. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <AssetsLibrary/ALAssetsLibrary.h>
#import <Photos/Photos.h>
#import <UIKit/UIKit.h>
#import <ReplayKit/ReplayKit.h>

typedef void(^ULReplayPreviewBlock)(BOOL isSuccess,RPPreviewViewController *viewController);

/**
 录制回调delegate
 */
@protocol ULCDPReplayDelegate <NSObject>
@optional

/**
 *  开始录制回调
 */
- (void)replayRecordStart;


/**
 录制结束或错误回调

 @param previewViewController 预览viewController
 @param errorInfo 错误信息
 */
- (void)replayRecordFinishWithVC:(RPPreviewViewController *)previewViewController errorInfo:(NSString *)errorInfo;

/**
 *  保存到系统相册成功回调
 */
- (void)saveSuccess;


@end


/**
 系统版本需要是iOS9.0及以上才支持ReplayKit框架录制
 */
@interface ULCDPReplay : NSObject

/**
 *  代理
 */
@property (nonatomic,weak) id <ULCDPReplayDelegate> delegate;

/**
 *  是否正在录制
 */
@property (nonatomic,assign,readonly) BOOL isRecording;

/**
 *  单例对象
 */
+ (instancetype)sharedReplay;


/**
 开始录制

 @param block 回调
 */
- (void)startRecordBlock:(void(^)(BOOL successed, NSString *msg))block;

/**
 结束录制
 @param isShow isShow   是否录制完后自动展示视频预览页
 @param finishBlock     完成回调
 @param previewBlock    预览回调
 */
- (void)stopRecordAndShowVideoPreviewController:(BOOL)isShow
                                   finishBlock:(void(^)(BOOL successed, NSURL *videoUrl ,NSString *msg))finishBlock
                                  previewBlock:(ULReplayPreviewBlock)previewBlock;

/**
 取消录制
 */
- (void)cancelRecord;

@end

//
//  ULCDPReplay.m
//  UXLive
//
//  Created by zhangxiwei on 2017/6/20.
//  Copyright © 2017年 UXIN CO. All rights reserved.
//
#import "ULCDPReplay.h"
#import "ULAssertUtil.h"

@interface ULCDPReplay () <RPPreviewViewControllerDelegate>

@property (nonatomic, strong) NSDate *createDate;

@end

@implementation ULCDPReplay

/**
 单例化对象

 @return 实例
 */
+ (instancetype)sharedReplay {
    static ULCDPReplay *replay=nil;
    static dispatch_once_t token;
    dispatch_once(&token, ^{
        replay=[[ULCDPReplay alloc] init];
    });
    return replay;
}

/**
 是否正在录制

 @return 是否
 */
- (BOOL)isRecording {
    return [RPScreenRecorder sharedRecorder].recording;
}

#pragma mark - 开始/结束录制

- (void)startRecordBlock:(void (^)(BOOL success, NSString *message))block {
    self.createDate = [NSDate date];
    if ([RPScreenRecorder sharedRecorder].recording==YES) {
        ULLogInfo(@"CDPReplay:已经开始录制");
        return;
    }
    if ([self systemVersionOK]) {
        if ([[RPScreenRecorder sharedRecorder] isAvailable]) {
            ULLogInfo(@"CDPReplay:录制开始初始化");
            [ULToast showProgress:@"录屏初始化中..."];
            [[RPScreenRecorder sharedRecorder] startRecordingWithMicrophoneEnabled:YES handler:^(NSError *error){
                dispatch_main_sync_ulsafe(^{
                    [ULToast hideProgress];
                });
                if (error) {
                    ULLogInfo(@"CDPReplay:开始录制error %@",error);
                    [[RPScreenRecorder sharedRecorder] discardRecordingWithHandler:^{
                        ULLogInfo(@"CDPReplay:discardRecordingWithHandler");
                    }];
                    if (block) {
                        block(NO, @"录制失败,请重试");
                    }
                    if ([_delegate respondsToSelector:@selector(replayRecordFinishWithVC:errorInfo:)]) {
                        [_delegate replayRecordFinishWithVC:nil errorInfo:[NSString stringWithFormat:@"CDPReplay:开始录制error %@",error]];
                    }
                } else {
                    ULLogInfo(@"CDPReplay:开始录制");
                    if (block) {
                        block(YES, @"开始录制");
                    }
                    if ([_delegate respondsToSelector:@selector(replayRecordStart)]) {
                        [_delegate replayRecordStart];
                    }
                }

            }];
        } else {
            if (block) {
                block(NO, @"环境不支持屏幕录制");
            }
            ULLogInfo(@"CDPReplay:环境不支持ReplayKit录制");
            if ([_delegate respondsToSelector:@selector(replayRecordFinishWithVC:errorInfo:)]) {
                [_delegate replayRecordFinishWithVC:nil errorInfo:@"CDPReplay:环境不支持ReplayKit录制"];
            }
        }
    } else {
        ULLogInfo(@"CDPReplay:系统版本需要是iOS9.0及以上才支持ReplayKit录制");
        if (block) {
            block(NO, @"系统版本需要是iOS9.0及以上才支持屏幕录制");
        }
        if ([_delegate respondsToSelector:@selector(replayRecordFinishWithVC:errorInfo:)]) {
            [_delegate replayRecordFinishWithVC:nil errorInfo:@"CDPReplay:系统版本需要是iOS9.0及以上才支持ReplayKit录制"];
        }
    }
}

- (void)stopRecordAndShowVideoPreviewController:(BOOL)isShow
                                    finishBlock:(void (^)(BOOL, NSURL *, NSString *))finishBlock
                                   previewBlock:(ULReplayPreviewBlock)previewBlock {
    ULLogInfo(@"CDPReplay:正在结束录制");
    WS(weakSelf)
    [[RPScreenRecorder sharedRecorder] stopRecordingWithHandler:^(RPPreviewViewController *previewViewController, NSError *  error){
        if (error) {
            ULLogInfo(@"CDPReplay:结束录制error %@", error);
            [[RPScreenRecorder sharedRecorder] discardRecordingWithHandler:^{
                ULLogInfo(@"CDPReplay:discardRecordingWithHandler");
            }];
            if ([_delegate respondsToSelector:@selector(replayRecordFinishWithVC:errorInfo:)]) {
                [_delegate replayRecordFinishWithVC:nil errorInfo:[NSString stringWithFormat:@"CDPReplay:结束录制error %@",error]];
            }
            if (finishBlock) {
                finishBlock(NO, nil, @"录制失败，请稍后重试");
            }
        } else {
            ULLogInfo(@"CDPReplay:录制完成");
            if ([_delegate respondsToSelector:@selector(replayRecordFinishWithVC:errorInfo:)]) {
                [_delegate replayRecordFinishWithVC:previewViewController errorInfo:@""];
            }
            [previewViewController setPreviewControllerDelegate:weakSelf];
            if (ULOSVersionFloat >= 9.0f && ULOSVersionFloat < 10.0f) {
                if (previewBlock) {
                    previewBlock(YES, previewViewController);
                }
            } else {
                NSURL *movieURL = [previewViewController valueForKey:@"movieURL"];

                ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc]init];
                [assetsLibrary writeVideoAtPathToSavedPhotosAlbum:movieURL completionBlock:^(NSURL *assetURL, NSError *error) {
                    if (error) {
                        ULLogInfo(@"CDPReplay 保存失败 %@ %@", error, assetURL);
                        if (finishBlock) {
                            finishBlock(NO, assetURL, @"录制成功");
                        }
                    } else {
                        ULLogInfo(@"CDPReplay 保存成功 %@", assetURL);
                        if (finishBlock) {
                            finishBlock(YES, assetURL, @"录制成功");
                        }
                    }
                }];
            }
        }
    }];
}

- (void)cancelRecord {
    ULLogInfo(@"CDPReplay 取消录制");
    [[RPScreenRecorder sharedRecorder] stopRecordingWithHandler:^(RPPreviewViewController *previewViewController, NSError *  error){
        if (error) {
            ULLogInfo(@"CDPReplay cancelRecord:结束录制error %@", error);
        } else {
            ULLogInfo(@"CDPReplay cancelRecord:录制完成");
        }
        [[RPScreenRecorder sharedRecorder] discardRecordingWithHandler:^{

        }];
    }];
}

#pragma mark - 其他方法

/**
 判断对应系统版本是否支持ReplayKit

 @return 是否支持系统
 */
- (BOOL)systemVersionOK {
    if (IS_IOS9_OR_LATER) {
        return YES;
    } else {
        return NO;
    }
}


@end

注意点：

• 系统版本在iOS10 以上

NSURL *movieURL = [previewViewController valueForKey:@"movieURL"];

通过私有变量能获取到存储地址，可以直接读取视频地址了，但是存在几个坑，各位有好办法也可以同步，我直接拿地址操作时不行的，以为地址的目录是在ReplayKit的一个目录下，个人理解应该是跨应用了，数据保护之类的（猜测），我做了一把直接存储到相册，然后再从相册里面读取就能对文件进行操作了。

• 系统 iOS9~iOS 10包含iOS9

该系统下通过previewViewController通过上述方法是找不到的，打印一下私有属性就能证明，只能通过提供的previewViewController来保存做操作。我的方法是引导用户去点击存储，然后通过点击存储回调从相册里面获取最新的文件，（坑出现）虽然给的回调是存储回调，但是一般情况下这个时候文件还没有存储成功，我延迟1s后获取。因为我们一般都是限制60s以内的视频，所以一般都没有问题。

获取最新的asset

+ (PHAsset *)latestAsset {
    // 获取所有资源的集合，并按资源的创建时间排序
    PHFetchOptions *options = [[PHFetchOptions alloc] init];
    options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
    options.predicate = [NSPredicate predicateWithFormat:@"mediaType == %ld",
                        PHAssetMediaTypeVideo];
    PHFetchResult *assetsFetchResults = [PHAsset fetchAssetsWithOptions:options];
    return [assetsFetchResults firstObject];
}