ios微信原相机（iOS 自定义相机）

网上有很多自定义相机的例子，这里只是我临时写的一个小demo，仅供参考：

用到了下面几个库：

1 2	`#import <avfoundation/avfoundation.h>` `#import <assetslibrary/assetslibrary.h>`

在使用的时候需要在info.plist中把相关权限写进去：

1 2 3 privacy - microphone usage description privacy - photo library usage description privacy - camera usage description

我在写这个demo时，是按照微信的样式写的，同样是点击拍照、长按录制视频，视频录制完直接进行播放，这里封装了一个简易的播放器：

m文件

另外微信下面的按钮长按会出现圆弧时间条：

m文件

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 #import "hprogressview.h" @interface hprogressview () /** * 进度值0-1.0之间 */ @property (nonatomic,assign)cgfloat progressvalue; @property (nonatomic, assign) cgfloat currenttime; @end @implementation hprogressview // only override drawrect: if you perform custom drawing. // an empty implementation adversely affects performance during animation. - (void)drawrect:(cgrect)rect { // drawing code cgcontextref ctx = uigraphicsgetcurrentcontext();//获取上下文 plog(@"width = %f",self.frame.size.width); cgpoint center = cgpointmake(self.frame.size.width/2.0, self.frame.size.width/2.0); //设置圆心位置 cgfloat radius = self.frame.size.width/2.0-5; //设置半径 cgfloat starta = - m_pi_2; //圆起点位置 cgfloat enda = -m_pi_2 + m_pi * 2 * _progressvalue; //圆终点位置 uibezierpath *path = [uibezierpath bezierpathwitharccenter:center radius:radius startangle:starta endangle:enda clockwise:yes]; cgcontextsetlinewidth(ctx, 10); //设置线条宽度 [[uicolor whitecolor] setstroke]; //设置描边颜色 cgcontextaddpath(ctx, path.cgpath); //把路径添加到上下文 cgcontextstrokepath(ctx); //渲染 } - (void)settimemax:(nsinteger)timemax { _timemax = timemax; self.currenttime = 0; self.progressvalue = 0; [self setneedsdisplay]; self.hidden = no; [self performselector:@selector(startprogress) withobject:nil afterdelay:0.1]; } - (void)clearprogress { _currenttime = _timemax; self.hidden = yes; } - (void)startprogress { _currenttime += 0.1; if (_timemax > _currenttime) { _progressvalue = _currenttime/_timemax; plog(@"progress = %f",_progressvalue); [self setneedsdisplay]; [self performselector:@selector(startprogress) withobject:nil afterdelay:0.1]; } if (_timemax <= _currenttime) { [self clearprogress]; } } @end

接下来就是相机的控制器了，由于是临时写的，所以用的xib，大家不要直接使用，直接上m文件代码吧：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 #import "hvideoviewcontroller.h" #import <avfoundation/avfoundation.h> #import "havplayer.h" #import "hprogressview.h" #import <foundation/foundation.h> #import <assetslibrary/assetslibrary.h> typedef void(^propertychangeblock)(avcapturedevice *capturedevice); @interface hvideoviewcontroller ()<avcapturefileoutputrecordingdelegate> //轻触拍照，按住摄像 @property (strong, nonatomic) iboutlet uilabel *labeltiptitle; //视频输出流 @property (strong,nonatomic) avcapturemoviefileoutput *capturemoviefileoutput; //图片输出流 //@property (strong,nonatomic) avcapturestillimageoutput *capturestillimageoutput;//照片输出流 //负责从avcapturedevice获得输入数据 @property (strong,nonatomic) avcapturedeviceinput *capturedeviceinput; //后台任务标识 @property (assign,nonatomic) uibackgroundtaskidentifier backgroundtaskidentifier; @property (assign,nonatomic) uibackgroundtaskidentifier lastbackgroundtaskidentifier; @property (weak, nonatomic) iboutlet uiimageview *focuscursor; //聚焦光标 //负责输入和输出设备之间的数据传递 @property(nonatomic)avcapturesession *session; //图像预览层，实时显示捕获的图像 @property(nonatomic)avcapturevideopreviewlayer *previewlayer; @property (strong, nonatomic) iboutlet uibutton *btnback; //重新录制 @property (strong, nonatomic) iboutlet uibutton *btnafresh; //确定 @property (strong, nonatomic) iboutlet uibutton *btnensure; //摄像头切换 @property (strong, nonatomic) iboutlet uibutton *btncamera; @property (strong, nonatomic) iboutlet uiimageview *bgview; //记录录制的时间默认最大60秒 @property (assign, nonatomic) nsinteger seconds; //记录需要保存视频的路径 @property (strong, nonatomic) nsurl *savevideourl; //是否在对焦 @property (assign, nonatomic) bool isfocus; @property (strong, nonatomic) iboutlet nslayoutconstraint *afreshcenterx; @property (strong, nonatomic) iboutlet nslayoutconstraint *ensurecenterx; @property (strong, nonatomic) iboutlet nslayoutconstraint *backcenterx; //视频播放 @property (strong, nonatomic) havplayer *player; @property (strong, nonatomic) iboutlet hprogressview *progressview; //是否是摄像 yes 代表是录制 no 表示拍照 @property (assign, nonatomic) bool isvideo; @property (strong, nonatomic) uiimage *takeimage; @property (strong, nonatomic) uiimageview *takeimageview; @property (strong, nonatomic) iboutlet uiimageview *imgrecord; @end //时间大于这个就是视频，否则为拍照 #define timemax 1 @implementation hvideoviewcontroller -(void)dealloc{ [self removenotification]; } - (void)viewdidload { [super viewdidload]; // do any additional setup after loading the view. uiimage *image = [uiimage imagenamed:@"sc_btn_take.png"]; self.backcenterx.constant = -(screen_width/2/2)-image.size.width/2/2; self.progressview.layer.cornerradius = self.progressview.frame.size.width/2; if (self.hseconds == 0) { self.hseconds = 60; } [self performselector:@selector(hiddentipslabel) withobject:nil afterdelay:4]; } - (void)hiddentipslabel { self.labeltiptitle.hidden = yes; } - (void)didreceivememorywarning { [super didreceivememorywarning]; // dispose of any resources that can be recreated. } - (void)viewwillappear:(bool)animated { [super viewwillappear:animated]; [[uiapplication sharedapplication] setstatusbarhidden:yes]; [self customcamera]; [self.session startrunning]; } -(void)viewdidappear:(bool)animated{ [super viewdidappear:animated]; } -(void)viewdiddisappear:(bool)animated{ [super viewdiddisappear:animated]; [self.session stoprunning]; } - (void)viewwilldisappear:(bool)animated { [super viewwilldisappear:animated]; [[uiapplication sharedapplication] setstatusbarhidden:no]; } - (void)customcamera { //初始化会话，用来结合输入输出 self.session = [[avcapturesession alloc] init]; //设置分辨率 (设备支持的最高分辨率) if ([self.session cansetsessionpreset:avcapturesessionpresethigh]) { self.session.sessionpreset = avcapturesessionpresethigh; } //取得后置摄像头 avcapturedevice *capturedevice = [self getcameradevicewithposition:avcapturedevicepositionback]; //添加一个音频输入设备 avcapturedevice *audiocapturedevice=[[avcapturedevice deviceswithmediatype:avmediatypeaudio] firstobject]; //初始化输入设备 nserror *error = nil; self.capturedeviceinput = [[avcapturedeviceinput alloc] initwithdevice:capturedevice error:&error]; if (error) { plog(@"取得设备输入对象时出错，错误原因：%@",error.localizeddescription); return; } //添加音频 error = nil; avcapturedeviceinput *audiocapturedeviceinput=[[avcapturedeviceinput alloc]initwithdevice:audiocapturedevice error:&error]; if (error) { nslog(@"取得设备输入对象时出错，错误原因：%@",error.localizeddescription); return; } //输出对象 self.capturemoviefileoutput = [[avcapturemoviefileoutput alloc] init];//视频输出 //将输入设备添加到会话 if ([self.session canaddinput:self.capturedeviceinput]) { [self.session addinput:self.capturedeviceinput]; [self.session addinput:audiocapturedeviceinput]; //设置视频防抖 avcaptureconnection *connection = [self.capturemoviefileoutput connectionwithmediatype:avmediatypevideo]; if ([connection isvideostabilizationsupported]) { connection.preferredvideostabilizationmode = avcapturevideostabilizationmodecinematic; } } //将输出设备添加到会话 (刚开始是照片为输出对象) if ([self.session canaddoutput:self.capturemoviefileoutput]) { [self.session addoutput:self.capturemoviefileoutput]; } //创建视频预览层，用于实时展示摄像头状态 self.previewlayer = [[avcapturevideopreviewlayer alloc] initwithsession:self.session]; self.previewlayer.frame = self.view.bounds;//cgrectmake(0, 0, self.view.width, self.view.height); self.previewlayer.videogravity = avlayervideogravityresizeaspectfill;//填充模式 [self.bgview.layer addsublayer:self.previewlayer]; [self addnotificationtocapturedevice:capturedevice]; [self addgensturerecognizer]; } - (ibaction)oncancelaction:(uibutton *)sender { [self dismissviewcontrolleranimated:yes completion:^{ [utility hideprogressdialog]; }]; } - (void)touchesbegan:(nsset<uitouch *> *)touches withevent:(uievent *)event { if ([[touches anyobject] view] == self.imgrecord) { plog(@"开始录制"); //根据设备输出获得连接 avcaptureconnection *connection = [self.capturemoviefileoutput connectionwithmediatype:avmediatypeaudio]; //根据连接取得设备输出的数据 if (![self.capturemoviefileoutput isrecording]) { //如果支持多任务则开始多任务 if ([[uidevice currentdevice] ismultitaskingsupported]) { self.backgroundtaskidentifier = [[uiapplication sharedapplication] beginbackgroundtaskwithexpirationhandler:nil]; } if (self.savevideourl) { [[nsfilemanager defaultmanager] removeitematurl:self.savevideourl error:nil]; } //预览图层和视频方向保持一致 connection.videoorientation = [self.previewlayer connection].videoorientation; nsstring *outputfielpath=[nstemporarydirectory() stringbyappendingstring:@"mymovie.mov"]; nslog(@"save path is :%@",outputfielpath); nsurl *fileurl=[nsurl fileurlwithpath:outputfielpath]; nslog(@"fileurl:%@",fileurl); [self.capturemoviefileoutput startrecordingtooutputfileurl:fileurl recordingdelegate:self]; } else { [self.capturemoviefileoutput stoprecording]; } } } - (void)touchesended:(nsset<uitouch *> *)touches withevent:(uievent *)event { if ([[touches anyobject] view] == self.imgrecord) { plog(@"结束触摸"); if (!self.isvideo) { [self performselector:@selector(endrecord) withobject:nil afterdelay:0.3]; } else { [self endrecord]; } } } - (void)endrecord { [self.capturemoviefileoutput stoprecording];//停止录制 } - (ibaction)onafreshaction:(uibutton *)sender { plog(@"重新录制"); [self recoverlayout]; } - (ibaction)onensureaction:(uibutton *)sender { plog(@"确定这里进行保存或者发送出去"); if (self.savevideourl) { ws(weakself) [utility showprogressdialogtext:@"视频处理中..."]; alassetslibrary *assetslibrary=[[alassetslibrary alloc]init]; [assetslibrary writevideoatpathtosavedphotosalbum:self.savevideourl completionblock:^(nsurl *asseturl, nserror *error) { plog(@"outputurl:%@",weakself.savevideourl); [[nsfilemanager defaultmanager] removeitematurl:weakself.savevideourl error:nil]; if (weakself.lastbackgroundtaskidentifier!= uibackgroundtaskinvalid) { [[uiapplication sharedapplication] endbackgroundtask:weakself.lastbackgroundtaskidentifier]; } if (error) { plog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizeddescription); [utility showalltextdialog:kappdelegate.window text:@"保存视频到相册发生错误"]; } else { if (weakself.takeblock) { weakself.takeblock(asseturl); } plog(@"成功保存视频到相簿."); [weakself oncancelaction:nil]; } }]; } else { //照片 uiimagewritetosavedphotosalbum(self.takeimage, self, nil, nil); if (self.takeblock) { self.takeblock(self.takeimage); } [self oncancelaction:nil]; } } //前后摄像头的切换 - (ibaction)oncameraaction:(uibutton *)sender { plog(@"切换摄像头"); avcapturedevice *currentdevice=[self.capturedeviceinput device]; avcapturedeviceposition currentposition=[currentdevice position]; [self removenotificationfromcapturedevice:currentdevice]; avcapturedevice *tochangedevice; avcapturedeviceposition tochangeposition = avcapturedevicepositionfront;//前 if (currentposition == avcapturedevicepositionunspecified || currentposition == avcapturedevicepositionfront) { tochangeposition = avcapturedevicepositionback;//后 } tochangedevice=[self getcameradevicewithposition:tochangeposition]; [self addnotificationtocapturedevice:tochangedevice]; //获得要调整的设备输入对象 avcapturedeviceinput *tochangedeviceinput=[[avcapturedeviceinput alloc]initwithdevice:tochangedevice error:nil]; //改变会话的配置前一定要先开启配置，配置完成后提交配置改变 [self.session beginconfiguration]; //移除原有输入对象 [self.session removeinput:self.capturedeviceinput]; //添加新的输入对象 if ([self.session canaddinput:tochangedeviceinput]) { [self.session addinput:tochangedeviceinput]; self.capturedeviceinput = tochangedeviceinput; } //提交会话配置 [self.session commitconfiguration]; } - (void)onstarttranscribe:(nsurl *)fileurl { if ([self.capturemoviefileoutput isrecording]) { -- self.seconds; if (self.seconds > 0) { if (self.hseconds - self.seconds >= timemax && !self.isvideo) { self.isvideo = yes;//长按时间超过timemax 表示是视频录制 self.progressview.timemax = self.seconds; } [self performselector:@selector(onstarttranscribe:) withobject:fileurl afterdelay:1.0]; } else { if ([self.capturemoviefileoutput isrecording]) { [self.capturemoviefileoutput stoprecording]; } } } } #pragma mark - 视频输出代理 -(void)captureoutput:(avcapturefileoutput *)captureoutput didstartrecordingtooutputfileaturl:(nsurl *)fileurl fromconnections:(nsarray *)connections{ plog(@"开始录制..."); self.seconds = self.hseconds; [self performselector:@selector(onstarttranscribe:) withobject:fileurl afterdelay:1.0]; } -(void)captureoutput:(avcapturefileoutput *)captureoutput didfinishrecordingtooutputfileaturl:(nsurl *)outputfileurl fromconnections:(nsarray *)connections error:(nserror *)error{ plog(@"视频录制完成."); [self changelayout]; if (self.isvideo) { self.savevideourl = outputfileurl; if (!self.player) { self.player = [[havplayer alloc] initwithframe:self.bgview.bounds withshowinview:self.bgview url:outputfileurl]; } else { if (outputfileurl) { self.player.videourl = outputfileurl; self.player.hidden = no; } } } else { //照片 self.savevideourl = nil; [self videohandlephoto:outputfileurl]; } } - (void)videohandlephoto:(nsurl *)url { avurlasset *urlset = [avurlasset assetwithurl:url]; avassetimagegenerator *imagegenerator = [avassetimagegenerator assetimagegeneratorwithasset:urlset]; imagegenerator.appliespreferredtracktransform = yes; // 截图的时候调整到正确的方向 nserror *error = nil; cmtime time = cmtimemake(0,30);//缩略图创建时间 cmtime是表示电影时间信息的结构体，第一个参数表示是视频第几秒，第二个参数表示每秒帧数.(如果要获取某一秒的第几帧可以使用cmtimemake方法) cmtime actucaltime; //缩略图实际生成的时间 cgimageref cgimage = [imagegenerator copycgimageattime:time actualtime:&actucaltime error:&error]; if (error) { plog(@"截取视频图片失败:%@",error.localizeddescription); } cmtimeshow(actucaltime); uiimage *image = [uiimage imagewithcgimage:cgimage]; cgimagerelease(cgimage); if (image) { plog(@"视频截取成功"); } else { plog(@"视频截取失败"); } self.takeimage = image;//[uiimage imagewithcgimage:cgimage]; [[nsfilemanager defaultmanager] removeitematurl:url error:nil]; if (!self.takeimageview) { self.takeimageview = [[uiimageview alloc] initwithframe:self.view.frame]; [self.bgview addsubview:self.takeimageview]; } self.takeimageview.hidden = no; self.takeimageview.image = self.takeimage; } #pragma mark - 通知 //注册通知 - (void)setupobservers { nsnotificationcenter *notification = [nsnotificationcenter defaultcenter]; [notification addobserver:self selector:@selector(applicationdidenterbackground:) name:uiapplicationwillresignactivenotification object:[uiapplication sharedapplication]]; } //进入后台就退出视频录制 - (void)applicationdidenterbackground:(nsnotification *)notification { [self oncancelaction:nil]; } /** * 给输入设备添加通知 */ -(void)addnotificationtocapturedevice:(avcapturedevice *)capturedevice{ //注意添加区域改变捕获通知必须首先设置设备允许捕获 [self changedeviceproperty:^(avcapturedevice *capturedevice) { capturedevice.subjectareachangemonitoringenabled=yes; }]; nsnotificationcenter *notificationcenter= [nsnotificationcenter defaultcenter]; //捕获区域发生改变 [notificationcenter addobserver:self selector:@selector(areachange:) name:avcapturedevicesubjectareadidchangenotification object:capturedevice]; } -(void)removenotificationfromcapturedevice:(avcapturedevice *)capturedevice{ nsnotificationcenter *notificationcenter= [nsnotificationcenter defaultcenter]; [notificationcenter removeobserver:self name:avcapturedevicesubjectareadidchangenotification object:capturedevice]; } /** * 移除所有通知 */ -(void)removenotification{ nsnotificationcenter *notificationcenter= [nsnotificationcenter defaultcenter]; [notificationcenter removeobserver:self]; } -(void)addnotificationtocapturesession:(avcapturesession *)capturesession{ nsnotificationcenter *notificationcenter= [nsnotificationcenter defaultcenter]; //会话出错 [notificationcenter addobserver:self selector:@selector(sessionruntimeerror:) name:avcapturesessionruntimeerrornotification object:capturesession]; } /** * 设备连接成功 * * @param notification 通知对象 */ -(void)deviceconnected:(nsnotification *)notification{ nslog(@"设备已连接..."); } /** * 设备连接断开 * * @param notification 通知对象 */ -(void)devicedisconnected:(nsnotification *)notification{ nslog(@"设备已断开."); } /** * 捕获区域改变 * * @param notification 通知对象 */ -(void)areachange:(nsnotification *)notification{ nslog(@"捕获区域改变..."); } /** * 会话出错 * * @param notification 通知对象 */ -(void)sessionruntimeerror:(nsnotification *)notification{ nslog(@"会话发生错误."); } /** * 取得指定位置的摄像头 * * @param position 摄像头位置 * * @return 摄像头设备 */ -(avcapturedevice *)getcameradevicewithposition:(avcapturedeviceposition )position{ nsarray *cameras= [avcapturedevice deviceswithmediatype:avmediatypevideo]; for (avcapturedevice *camera in cameras) { if ([camera position] == position) { return camera; } } return nil; } /** * 改变设备属性的统一操作方法 * * @param propertychange 属性改变操作 */ -(void)changedeviceproperty:(propertychangeblock)propertychange{ avcapturedevice *capturedevice= [self.capturedeviceinput device]; nserror *error; //注意改变设备属性前一定要首先调用lockforconfiguration:调用完之后使用unlockforconfiguration方法解锁 if ([capturedevice lockforconfiguration:&error]) { //自动白平衡 if ([capturedevice iswhitebalancemodesupported:avcapturewhitebalancemodecontinuousautowhitebalance]) { [capturedevice setwhitebalancemode:avcapturewhitebalancemodecontinuousautowhitebalance]; } //自动根据环境条件开启闪光灯 if ([capturedevice isflashmodesupported:avcaptureflashmodeauto]) { [capturedevice setflashmode:avcaptureflashmodeauto]; } propertychange(capturedevice); [capturedevice unlockforconfiguration]; }else{ nslog(@"设置设备属性过程发生错误，错误信息：%@",error.localizeddescription); } } /** * 设置闪光灯模式 * * @param flashmode 闪光灯模式 */ -(void)setflashmode:(avcaptureflashmode )flashmode{ [self changedeviceproperty:^(avcapturedevice *capturedevice) { if ([capturedevice isflashmodesupported:flashmode]) { [capturedevice setflashmode:flashmode]; } }]; } /** * 设置聚焦模式 * * @param focusmode 聚焦模式 */ -(void)setfocusmode:(avcapturefocusmode )focusmode{ [self changedeviceproperty:^(avcapturedevice *capturedevice) { if ([capturedevice isfocusmodesupported:focusmode]) { [capturedevice setfocusmode:focusmode]; } }]; } /** * 设置曝光模式 * * @param exposuremode 曝光模式 */ -(void)setexposuremode:(avcaptureexposuremode)exposuremode{ [self changedeviceproperty:^(avcapturedevice *capturedevice) { if ([capturedevice isexposuremodesupported:exposuremode]) { [capturedevice setexposuremode:exposuremode]; } }]; } /** * 设置聚焦点 * * @param point 聚焦点 */ -(void)focuswithmode:(avcapturefocusmode)focusmode exposuremode:(avcaptureexposuremode)exposuremode atpoint:(cgpoint)point{ [self changedeviceproperty:^(avcapturedevice *capturedevice) { // if ([capturedevice isfocuspointofinterestsupported]) { // [capturedevice setfocuspointofinterest:point]; // } // if ([capturedevice isexposurepointofinterestsupported]) { // [capturedevice setexposurepointofinterest:point]; // } if ([capturedevice isexposuremodesupported:exposuremode]) { [capturedevice setexposuremode:exposuremode]; } if ([capturedevice isfocusmodesupported:focusmode]) { [capturedevice setfocusmode:focusmode]; } }]; } /** * 添加点按手势，点按时聚焦 */ -(void)addgensturerecognizer{ uitapgesturerecognizer *tapgesture=[[uitapgesturerecognizer alloc]initwithtarget:self action:@selector(tapscreen:)]; [self.bgview addgesturerecognizer:tapgesture]; } -(void)tapscreen:(uitapgesturerecognizer *)tapgesture{ if ([self.session isrunning]) { cgpoint point= [tapgesture locationinview:self.bgview]; //将ui坐标转化为摄像头坐标 cgpoint camerapoint= [self.previewlayer capturedevicepointofinterestforpoint:point]; [self setfocuscursorwithpoint:point]; [self focuswithmode:avcapturefocusmodecontinuousautofocus exposuremode:avcaptureexposuremodecontinuousautoexposure atpoint:camerapoint]; } } /** * 设置聚焦光标位置 * * @param point 光标位置 */ -(void)setfocuscursorwithpoint:(cgpoint)point{ if (!self.isfocus) { self.isfocus = yes; self.focuscursor.center=point; self.focuscursor.transform = cgaffinetransformmakescale(1.25, 1.25); self.focuscursor.alpha = 1.0; [uiview animatewithduration:0.5 animations:^{ self.focuscursor.transform = cgaffinetransformidentity; } completion:^(bool finished) { [self performselector:@selector(onhiddenfocuscursoraction) withobject:nil afterdelay:0.5]; }]; } } - (void)onhiddenfocuscursoraction { self.focuscursor.alpha=0; self.isfocus = no; } //拍摄完成时调用 - (void)changelayout { self.imgrecord.hidden = yes; self.btncamera.hidden = yes; self.btnafresh.hidden = no; self.btnensure.hidden = no; self.btnback.hidden = yes; if (self.isvideo) { [self.progressview clearprogress]; } self.afreshcenterx.constant = -(screen_width/2/2); self.ensurecenterx.constant = screen_width/2/2; [uiview animatewithduration:0.25 animations:^{ [self.view layoutifneeded]; }]; self.lastbackgroundtaskidentifier = self.backgroundtaskidentifier; self.backgroundtaskidentifier = uibackgroundtaskinvalid; [self.session stoprunning]; } //重新拍摄时调用 - (void)recoverlayout { if (self.isvideo) { self.isvideo = no; [self.player stopplayer]; self.player.hidden = yes; } [self.session startrunning]; if (!self.takeimageview.hidden) { self.takeimageview.hidden = yes; } // self.savevideourl = nil; self.afreshcenterx.constant = 0; self.ensurecenterx.constant = 0; self.imgrecord.hidden = no; self.btncamera.hidden = no; self.btnafresh.hidden = yes; self.btnensure.hidden = yes; self.btnback.hidden = no; [uiview animatewithduration:0.25 animations:^{ [self.view layoutifneeded]; }]; } /* #pragma mark - navigation // in a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender { // get the new view controller using [segue destinationviewcontroller]. // pass the selected object to the new view controller. } */ @end

使用也挺简单：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 - (ibaction)oncameraaction:(uibutton *)sender { //额。。由于是demo,所以用的xib，大家根据需求自己更改，该demo只是提供一个思路，使用时不要直接拖入项目 hvideoviewcontroller *ctrl = [[nsbundle mainbundle] loadnibnamed:@"hvideoviewcontroller" owner:nil options:nil].lastobject; ctrl.hseconds = 30;//设置可录制最长时间 ctrl.takeblock = ^(id item) { if ([item iskindofclass:[nsurl class]]) { nsurl *videourl = item; //视频url } else { //图片 } }; [self presentviewcontroller:ctrl animated:yes completion:nil]; }