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iPhone摄像头设备获取.docx
iPhone摄像头设备获取
iPhone摄像头设备获取(分离简化版）
iPhone 摄像头设备获取 (在 iOS 代码库中浏览本帖)
管理提醒: 本帖被 gagaga 从 Mac 开发讨论区 移动到本区(2011-03-25)
又写了个新版的帖子，看不懂怎么用的看本人这个新贴，在不懂，那我
也没办法了。
iPhone 摄像头设备获取(分离简化版）
目的：打开、关闭前置摄像头，绘制图像，并获取摄像头的二进制数据。
需要的库
AVFoundation.framework 、CoreVideo.framework 、CoreMedia.framework 、QuartzCore.fr
amework
该摄像头捕抓必须编译真机的版本，模拟器下编译不了。
函数说明
- (void)createControl
{
// UI 界面控件的创建
}
- (AVCaptureDevice *)getFrontCamera;
获取前置摄像头设备
- (void)startVideoCapture;
打开摄像头并开始捕捉图像
其中代码：
AVCaptureVideoPreviewLayer* previewLayer = [AVCaptureVideoPreviewLayer layerWithS
ession: self->avCaptureSession];
previewLayer.frame = localView.bounds;
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[self->localView.layer addSublayer: previewLayer];
为把图片画到 UIView 里面
- (void)stopVideoCapture:(id)arg；
关闭摄像头，停止捕抓图像
其中代码：
for(UIView*viewinself->localView.subviews) {
[viewremoveFromSuperview];
}
为移除摄像头图像的 View
详情见代码，代码拷过去可以直接使用
Over!!!!
代码：
头文件：
//
// AVCallController.h
// Pxlinstall
//
// Created by Lin Charlie C. on 11-3-24.
// Copyright 2011 xxxx. All rights reserved.
//
#import
#import
@interface AVCallController : UIViewController
{
//UI
UILabel*labelState;
UIButton*btnStartVideo;
UIView*localView;
AVCaptureSession* avCaptureSession;
AVCaptureDevice *avCaptureDevice;
BOOLfirstFrame; //是否为第一帧
intproducerFps;
}
@property (nonatomic, retain) AVCaptureSession *avCaptureSession;
@property (nonatomic, retain) UILabel *labelState;
- (void)createControl;
- (AVCaptureDevice *)getFrontCamera;
- (void)startVideoCapture;
- (void)stopVideoCapture:(id)arg;
@end
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
实现文件：
//
// AVCallController.m
// Pxlinstall
//
// Created by Lin Charlie C. on 11-3-24.
// Copyright 2011 高鸿移通. All rights reserved.
//
#import "AVCallController.h"
@implementation AVCallController
@synthesize avCaptureSession;
@synthesize labelState;
// The designated initializer. Override if you create the controller programmatically and
want to perform customization that is not appropriate for viewDidLoad.
/*
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization.
}
return self;
}
*/
-(id)init
{
if(self= [superinit])
{
firstFrame= YES;
producerFps= 50;
}
returnself;
}
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
[superloadView];
[selfcreateControl];
}
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a
nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
{
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[superdidReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[superviewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
#pragma mark -
#pragma mark createControl
- (void)createControl
{
//UI 展示
self.view.backgroundColor= [UIColorgrayColor];
labelState= [[UILabelalloc] initWithFrame:CGRectMake(10, 20, 220, 30)];
labelState.backgroundColor= [UIColorclearColor];
[self.viewaddSubview:labelState];
[labelStaterelease];
btnStartVideo= [[UIButtonalloc] initWithFrame:CGRectMake(20, 350, 80, 50)];
[btnStartVideosetTitle:@"Star"forState:UIControlStateNormal];
[btnStartVideosetBackgroundImage:[UIImageimageNamed:@"Images/button.png"] forState:U
IControlStateNormal];
[btnStartVideoaddTarget:selfaction:@selector(startVideoCapture) forControlEvents:UIControl
EventTouchUpInside];
[self.viewaddSubview:btnStartVideo];
[btnStartVideorelease];
UIButton* stop = [[UIButtonalloc] initWithFrame:CGRectMake(120, 350, 80, 50)];
[stop setTitle:@"Stop"forState:UIControlStateNormal];
[stop setBackgroundImage:[UIImageimageNamed:@"Images/button.png"] forState:UIControl
StateNormal];
[stop addTarget:selfaction:@selector(stopVideoCapture:) forControlEvents:UIControlEventTo
uchUpInside];
[self.view addSubview:stop];
[stop release];
localView= [[UIViewalloc] initWithFrame:CGRectMake(40, 50, 200, 300)];
[self.viewaddSubview:localView];
[localViewrelease];
}
#pragma mark -
#pragma mark VideoCapture
- (AVCaptureDevice *)getFrontCamera
{
//获取前置摄像头设备
NSArray *cameras = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in cameras)
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