一.反向声音的方式 （ 连拍会导致有些时候声音不同步，还是会有漏网的快门声 推荐使用第二种方法 第一种方法不适用用于连续抓取照片）
需要导入photoShutter音频声音抵消 不是很靠谱
音频声音下载地址
http://www.cocoachina.com/bbs/job.php?action=download&aid=113986
- (void)cancelSystermSound {
static SystemSoundID soundID = 0;
if (soundID == 0) {
NSString *path =[[NSBundle bundleWithPath:_bundlepath]pathForResource:@"photoShutter2" ofType:@"caf"];
NSURL *filePath = [NSURL fileURLWithPath:path isDirectory:NO];
AudioServicesCreateSystemSoundID((__bridge CFURLRef)filePath, &soundID);
}
AudioServicesPlaySystemSound(soundID);
}
二.AVCaptureVideoDataOutput来对图像进行输出，没有了快门声音，代码如下：
//初始化
- (void)initAVCaptureSession{
AVCaptureSession *session = [[AVCaptureSession alloc] init];
NSError *error;
AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
//更改这个设置的时候必须先锁定设备，修改完后再解锁，否则崩溃
[device lockForConfiguration:nil];
//设置闪光灯为自动
if ([device isFlashModeSupported:AVCaptureFlashModeOff]) {
[device setFlashMode:AVCaptureFlashModeOff];
};
[device unlockForConfiguration];
self.videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:device error:&error];
if (error) {
NSLog(@"%@",error);
}
// Create a VideoDataOutput and add it to the session
self.imageOutput = [[AVCaptureVideoDataOutput alloc] init];
[self.session addOutput:self.imageOutput];
// Configure your output.
dispatch_queue_t queue = dispatch_queue_create("myQueue", NULL);
[self.imageOutput setSampleBufferDelegate:self queue:queue];
// Specify the pixel format
self.imageOutput.videoSettings = [NSDictionary dictionaryWithObject:
[NSNumber numberWithInt:kCVPixelFormatType_32BGRA]
forKey:(id)kCVPixelBufferPixelFormatTypeKey];
// Start the session running to start the flow of data
[session startRunning];
// Assign session to an ivar.
[self setSession:session];
if ([self.session canAddInput:self.videoInput]) {
[self.session addInput:self.videoInput];
}
if ([self.session canAddOutput:self.imageOutput]) {
[self.session addOutput:self.imageOutput];
}
AVCaptureDevicePosition desiredPosition = AVCaptureDevicePositionFront;
for (AVCaptureDevice *d in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
if ([d position] == desiredPosition) {
[self.previewLayer.session beginConfiguration];
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:d error:nil];
for (AVCaptureInput *oldInput in self.previewLayer.session.inputs) {
[[self.previewLayer session] removeInput:oldInput];
}
[self.previewLayer.session addInput:input];
[self.previewLayer.session commitConfiguration];
break;
}
}
}