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iOS自定义相机实现拍照、录制视频

2019年07月23日  | 移动技术网IT编程  | 我要评论

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本文实例为大家分享了ios自定义相机实现拍照、录制视频的具体代码，供大家参考，具体内容如下

使用avfoundation框架。

这里是demo

首先声明以下对象：

#import "customecameraviewcontroller.h"
#import <avfoundation/avfoundation.h>
#import <assetslibrary/assetslibrary.h>
 
@interface customecameraviewcontroller ()<avcapturefileoutputrecordingdelegate>
 
{
  // avcapturesession对象来执行输入设备和输出设备之间的数据传递
  avcapturesession *isession;
  //当前设备
  avcapturedevice *idevice;
  //输入设备
  avcapturedeviceinput *ideviceinput;
  //照片输出流
  avcapturestillimageoutput *istillimageoutput;
  //预览图层
  avcapturevideopreviewlayer *ipreviewlayer;
  
}

初始化各对象：

- (void)viewdidload {
  [super viewdidload];
  
  //点击屏幕对焦
  uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc]initwithtarget:self action:@selector(focustap:)];
  [self.view addgesturerecognizer:tap];
  
  
  isession = [[avcapturesession alloc]init];
  
  nsarray *devicearray = [avcapturedevice deviceswithmediatype:avmediatypevideo];
  for (avcapturedevice *device in devicearray) {
    
    //avcapturedevicepositionback 后置摄像头
    //avcapturedevicepositionfront 前置摄像头
    if (device.position == avcapturedevicepositionback) {
      idevice = device;
    }
  }
  
  
  isession.sessionpreset = [self getsessionpresetfordevice:idevice];
  
  ideviceinput = [[avcapturedeviceinput alloc]initwithdevice:idevice error:nil];
  
  
  ////输出设置。avvideocodecjpeg  输出jpeg格式图片
  istillimageoutput = [[avcapturestillimageoutput alloc]init];
  nsdictionary *outputdic = [nsdictionary dictionarywithobjectsandkeys:avvideocodecjpeg,avvideocodeckey, nil];
  [istillimageoutput setoutputsettings:outputdic];
  
  
  //更改这个设备设置的时候必须先锁定设备，修改完后再解锁，否则崩溃
  [idevice lockforconfiguration:nil];
  if ([idevice isflashmodesupported:avcaptureflashmodeoff]) {
    [idevice setflashmode:avcaptureflashmodeoff];
  }
  if ([idevice isfocusmodesupported:avcapturefocusmodeautofocus]) {
    [idevice setfocusmode:avcapturefocusmodeautofocus];
  }
  if ([idevice iswhitebalancemodesupported:avcapturewhitebalancemodeautowhitebalance]) {
    [idevice setwhitebalancemode:avcapturewhitebalancemodeautowhitebalance];
  }
  [idevice unlockforconfiguration];
  
  if ([isession canaddinput:ideviceinput]) {
    [isession addinput:ideviceinput];
  }
  if ([isession canaddoutput:istillimageoutput]) {
    [isession addoutput:istillimageoutput];
  }
  if ([isession canaddoutput:ivideooutput]) {
    [isession addoutput:ivideooutput];
  }
  
  //初始化预览图层
  ipreviewlayer = [[avcapturevideopreviewlayer alloc]initwithsession:isession];
  [ipreviewlayer setvideogravity:avlayervideogravityresizeaspectfill];
  ipreviewlayer.frame = cgrectmake(0, 60, [uiscreen mainscreen].bounds.size.width, [uiscreen mainscreen].bounds.size.height-160);
  [self.icameraview.layer addsublayer:ipreviewlayer];
  
  [isession startrunning];
  
  
}

点击按钮拍照：

//拍照
-(void)takepictures{
  avcaptureconnection *connection = [istillimageoutput connectionwithmediatype:avmediatypevideo];
  if (!connection) {
    nslog(@"失败");
    return;
  }
  //设置焦距
  [connection setvideoscaleandcropfactor:1];
  
  [istillimageoutput capturestillimageasynchronouslyfromconnection:connection completionhandler:^(cmsamplebufferref imagedatasamplebuffer, nserror *error) {
    if (imagedatasamplebuffer==null) {
      nslog(@"null");
      return ;
    }
    
    nsdata *data = [avcapturestillimageoutput jpegstillimagensdatarepresentation:imagedatasamplebuffer];
    uiimage *image = [uiimage imagewithdata:data];
    
    
  }];
}

image即为拍照所得图片：

设置session的avcapturesessionpreset属性

-(nsstring *)getsessionpresetfordevice:(avcapturedevice *)device{
  if ([device supportsavcapturesessionpreset:avcapturesessionpreset3840x2160]) {
    return avcapturesessionpreset3840x2160;
  } else if([device supportsavcapturesessionpreset:avcapturesessionpreset1920x1080]){
    return avcapturesessionpreset1920x1080;
  } else if ([device supportsavcapturesessionpreset:avcapturesessionpreset1280x720]){
    return avcapturesessionpreset1280x720;
  } else if ([device supportsavcapturesessionpreset:avcapturesessionpreset640x480]){
    return avcapturesessionpreset640x480;
  } else if ([device supportsavcapturesessionpreset:avcapturesessionpreset352x288]){
    return avcapturesessionpreset352x288;
  } else if ([device supportsavcapturesessionpreset:avcapturesessionpresethigh]){
    return avcapturesessionpresethigh;
  } else if ([device supportsavcapturesessionpreset:avcapturesessionpresetmedium]){
    return avcapturesessionpresetmedium;
  } else{
    return avcapturesessionpresetlow;
  }
}

设置闪光灯：

- (ibaction)iflashbtn:(id)sender {
  
  [idevice lockforconfiguration:nil];
  if (idevice.flashmode == avcaptureflashmodeoff) {
    if ([idevice isflashmodesupported:avcaptureflashmodeon]) {
      [idevice setflashmode:avcaptureflashmodeon];
      
      [self.iflashbtn setbackgroundimage:[uiimage imagenamed:@"flashbtn"] forstate:uicontrolstatenormal];
    }
  } else if (idevice.flashmode == avcaptureflashmodeon){
    if ([idevice isflashmodesupported:avcaptureflashmodeoff]) {
      [idevice setflashmode:avcaptureflashmodeoff];
      
       [self.iflashbtn setbackgroundimage:[uiimage imagenamed:@"flashoffbtn"] forstate:uicontrolstatenormal];
    }
  }
  [idevice unlockforconfiguration];
  
}

切换前置摄像头与后置摄像头：

- (ibaction)ichangebtn:(id)sender {
  
  
  nsarray *array = [avcapturedevice deviceswithmediatype:avmediatypevideo];
  avcapturedevice *newdevice = nil;
  avcapturedeviceinput *newdeviceinput = nil;
  
  catransition *animation = [catransition animation];
  animation.duration = 0.5f;
  animation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseineaseout];
  animation.type = @"oglflip";
  
  if (idevice.position == avcapturedevicepositionback) {
    animation.subtype = kcatransitionfromleft;
    for (avcapturedevice *device in array) {
      if (device.position == avcapturedevicepositionfront) {
        newdevice = device;
      }
    }
  } else if (idevice.position == avcapturedevicepositionfront){
    animation.subtype = kcatransitionfromright;
    for (avcapturedevice *device in array) {
      if (device.position == avcapturedevicepositionback) {
        newdevice = device;
      }
    }
  }
  
  newdeviceinput = [avcapturedeviceinput deviceinputwithdevice:newdevice error:nil];
  [ipreviewlayer addanimation:animation forkey:nil];
  if (newdeviceinput!=nil) {
    [isession beginconfiguration];
    [isession removeinput:ideviceinput];
     isession.sessionpreset = [self getsessionpresetfordevice:newdevice];
    if ([isession canaddinput:newdeviceinput]) {
      [isession addinput:newdeviceinput];
      ideviceinput = newdeviceinput;
      idevice = newdevice;
    } else {
      [isession addinput:ideviceinput];
    }
    [isession commitconfiguration];
  }
  
  
}

点击屏幕对焦：

//点击屏幕对焦
-(void)focustap:(uigesturerecognizer *)tap{
  cgpoint tappoint = [tap locationinview:self.view];
  
  
  float y = tappoint.y;
  if (y<60 || y>([uiscreen mainscreen].bounds.size.height-100)) {
    return;
  }
  
  [idevice lockforconfiguration:nil];
  if ([idevice isfocusmodesupported:avcapturefocusmodeautofocus]) {
    [idevice setfocuspointofinterest:cgpointmake(tappoint.x/self.view.frame.origin.x, tappoint.y/self.view.frame.origin.y)];
    [idevice setfocusmode:avcapturefocusmodeautofocus];
  }
  [idevice unlockforconfiguration];
  
  self.ifocusimgview.center = tappoint;
  self.ifocusimgview.hidden = no;
  [uiview animatewithduration:0.3 animations:^{
    self.ifocusimgview.transform = cgaffinetransformmakescale(1.25, 1.25);
  }completion:^(bool finished) {
    [uiview animatewithduration:0.5 animations:^{
      self.ifocusimgview.transform = cgaffinetransformidentity;
    } completion:^(bool finished) {
      self.ifocusimgview.hidden = yes;
    }];
  }];
}

关于视频录制可以在demo中查看。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。

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