我知道,打开闪光灯并将其保持在iPhone 4上的唯一方法是打开摄像机。我不太确定代码。这是我正在尝试的:
-(IBAction)turnTorchOn {
AVCaptureSession *captureSession = [[AVCaptureSession alloc] init];
AVCaptureDevice *videoCaptureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error = nil;
AVCaptureDeviceInput *videoInput = [AVCaptureDeviceInput deviceInputWithDevice:videoCaptureDevice error:&error];
if (videoInput) {
[captureSession addInput:videoInput];
AVCaptureVideoDataOutput* videoOutput = [[AVCaptureVideoDataOutput alloc] init];
[videoOutput setSampleBufferDelegate:self queue:dispatch_get_current_queue()];
[captureSession addOutput:videoOutput];
[captureSession startRunning];
videoCaptureDevice.torchMode = AVCaptureTorchModeOn;
}
}
有人知道这是否行得通还是我有什么遗漏? (我还没有iPhone 4可以测试-只是尝试一些新的API)。
谢谢
最佳答案
在您的代码中设置了lockforConfiguration
,您在其中声明AVCaptureDevice
是一个属性。
[videoCaptureDevice lockForConfiguration:nil];
关于ios - 在iPhone上打开手电筒/闪光灯,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/3190034/