我想这样做,以便我拍照时我的闪光灯会有时间,但不知道怎么做。我曾经尝试过NSTimer和NSSleep以及其他计时方式,但是因为有时相机需要更长的时间来对焦和拍照,而不是其他时候,它并不总能让闪光灯完全正确。我该如何做到这一点?
以下是我如何做闪光灯...
func toggleFlash() {
let device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
if (device.hasTorch) {
device.lockForConfiguration(nil)
if (device.torchMode == AVCaptureTorchMode.On) {
device.torchMode = AVCaptureTorchMode.Off
} else {
device.setTorchModeOnWithLevel(1.0, error: nil)
}
device.unlockForConfiguration()
}
}
以下是我拍照的方法......
func didPressTakePhoto(){
if let videoConnection = stillImageOutput?.connectionWithMediaType(AVMediaTypeVideo){
videoConnection.videoOrientation = AVCaptureVideoOrientation.Portrait
stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {
(sampleBuffer, error) in
if sampleBuffer != nil {
var imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
var dataProvider = CGDataProviderCreateWithCFData(imageData)
var cgImageRef = CGImageCreateWithJPEGDataProvider(dataProvider, nil, true, kCGRenderingIntentDefault)
var image:UIImage!
if self.camera == true {
image = UIImage(CGImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.Right)
} else {
image = UIImage(CGImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.LeftMirrored)
}
self.tempImageView.image = image
self.tempImageView.hidden = false
}
})
}
}
答案 0 :(得分:2)
在toggleFlash
中,您需要设置
device.flashMode = .On
您正在设置torchMode
。
纠正此问题应使captureStillImageAsynchronouslyFromConnection
期间闪光灯在正确的时间关闭。