优化iPhone拍照速度，UIImagePickerController
我在我的应用程序中使用UIImagePickerController。有没有人使用任何优化技巧来拍照延迟？我不需要将它们存储到库中。我只想捕获像素数据并在进行计算后销毁图像对象。
此外，还有一种方法可以在镜头加载时隐藏镜头吗？
（最坏的情况是，我可以在相机启动时屏蔽镜头并在保存/计算时屏蔽冻结的图像。）
编辑：我已经设置了
showsCameraControls = NO;
没有找到相关结果
已邀请:
1 个回复
了驳
AVCaptureSession *session; AVCaptureDevice *device; AVCaptureVideoDataOutput *output; // create a capture session session = [[AVCaptureSession alloc] init]; session.sessionPreset = ...frame quality you want...; // grab the default video device (which will be the back camera on a device // with two), create an input for it to the capture session NSError *error = nil; device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; // connect the two [session addInput:input]; // create an object to route output back here output = [[AVCaptureVideoDataOutput alloc] init]; [session addOutput:output]; // create a suitable dispatch queue, GCD style, and hook // self up as the delegate dispatch_queue_t queue = dispatch_queue_create(NULL, NULL); [output setSampleBufferDelegate:self queue:queue]; dispatch_release(queue); // set 32bpp BGRA pixel format output.videoSettings = [NSDictionary dictionaryWithObject: [NSNumber numberWithInt:kCVPixelFormatType_32BGRA] forKey:(id)kCVPixelBufferPixelFormatTypeKey]; [session startRunning];CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); // lock momentarily, to get enough details to create a CGImage in the future... CVPixelBufferLockBaseAddress(imageBuffer, 0); void *baseAddress = CVPixelBufferGetBaseAddress(imageBuffer); size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); size_t width = CVPixelBufferGetWidth(imageBuffer); size_t height = CVPixelBufferGetHeight(imageBuffer); CVPixelBufferUnlockBaseAddress(imageBuffer, 0); // create a CGImageRef CGColorSpaceRef colourSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef contextRef = CGBitmapContextCreate(baseAddress, width, height, 8, bytesPerRow, colourSpace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); CGImageRef imageRef = CGBitmapContextCreateImage(contextRef); CGContextRelease(contextRef); CGColorSpaceRelease(colourSpace); [self performSelectorOnMainThread:@selector(postCGImage:) withObject:[NSValue valueWithPointer:imageRef] waitUntilDone:YES]; CGImageRelease(imageRef);