ios - 如何拍照并同时保存(swift3)
<p><p>现在我的代码有 1 个 View 、1 个按钮和 1 个 ImageView 。目前，代码拍摄照片并放置在 uniimageview 上。如何编写代码，以便每次拍摄照片时都会将其保存到照片库中。我已经更新了 plist 设置。 </p>
<pre><code> import UIKit
import AVFoundation
class ViewController: UIViewController,AVCapturePhotoCaptureDelegate{
var captureSesssion : AVCaptureSession!
var cameraOutput : AVCapturePhotoOutput!
var previewLayer : AVCaptureVideoPreviewLayer!
@IBOutlet weak var capturedImage: UIImageView!
@IBOutlet weak var previewView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
captureSesssion = AVCaptureSession()
captureSesssion.sessionPreset = AVCaptureSessionPresetPhoto
cameraOutput = AVCapturePhotoOutput()
let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
if let input = try? AVCaptureDeviceInput(device: device) {
if (captureSesssion.canAddInput(input)) {
captureSesssion.addInput(input)
if (captureSesssion.canAddOutput(cameraOutput)) {
captureSesssion.addOutput(cameraOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSesssion)
previewLayer.frame = previewView.bounds
previewView.layer.addSublayer(previewLayer)
captureSesssion.startRunning()
}
} else {
print("issue here : captureSesssion.canAddInput")
}
} else {
print("some problem here")
}
}
// Take picture button
@IBAction func didPressTakePhoto(_ sender: UIButton) {
let settings = AVCapturePhotoSettings()
let previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first!
let previewFormat = [
kCVPixelBufferPixelFormatTypeKey as String: previewPixelType,
kCVPixelBufferWidthKey as String: 160,
kCVPixelBufferHeightKey as String: 160
]
settings.previewPhotoFormat = previewFormat
cameraOutput.capturePhoto(with: settings, delegate: self)
}
// callBack from take picture
func capture(_ captureOutput: AVCapturePhotoOutput,didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?,previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings:AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print("error occure : \(error.localizedDescription)")
}
iflet sampleBuffer = photoSampleBuffer,
let previewBuffer = previewPhotoSampleBuffer,
let dataImage =AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer:sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
print(UIImage(data: dataImage)?.size as Any)
let dataProvider = CGDataProvider(data: dataImage as CFData)
let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)
self.capturedImage.image = image
} else {
print("some error here")
}
}
// This method you can use somewhere you need to know camera permission state
func askPermission() {
print("here")
let cameraPermissionStatus =AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
switch cameraPermissionStatus {
case .authorized:
print("Already Authorized")
case .denied:
print("denied")
let alert = UIAlertController(title: "Sorry :(" , message: "Butcould you please grant permission for camera within device settings",preferredStyle: .alert)
let action = UIAlertAction(title: "Ok", style: .cancel,handler: nil)
alert.addAction(action)
present(alert, animated: true, completion: nil)
case .restricted:
print("restricted")
default:
AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: {
(granted :Bool) -> Void in
if granted == true {
// User granted
print("User granted")
DispatchQueue.main.async(){
//Do smth that you need in main thread
}
}
else {
// User Rejected
print("User Rejected")
DispatchQueue.main.async(){
let alert = UIAlertController(title: "WHY?" , message:"Camera it is the main feature of our application", preferredStyle: .alert)
let action = UIAlertAction(title: "Ok", style: .cancel, handler: nil)
alert.addAction(action)
self?.present(alert, animated: true, completion: nil)
}
}
});
}
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>如果要保存照片，只需调用 <code>UIImageWriteToSavedPhotosAlbum</code> 并在现有代码中将图像对象传递给它</p>
<p>示例代码</p>
<pre><code> func capture(_ captureOutput: AVCapturePhotoOutput,didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?,previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings:AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let error = error {
print("error occure : \(error.localizedDescription)")
}
iflet sampleBuffer = photoSampleBuffer,
let previewBuffer = previewPhotoSampleBuffer,
let dataImage =AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer:sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
print(UIImage(data: dataImage)?.size as Any)
let dataProvider = CGDataProvider(data: dataImage as CFData)
let cgImageRef: CGImage! = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)
let image = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)
self.capturedImage.image = image
//Add: Save image object to photo album
// UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) //
UIImageWriteToSavedPhotosAlbum(image, self, #selector(self.image(_:didFinishSavingWithError:contextInfo:)), nil)
} else {
print("some error here")
}
}
func image(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Image Saved!", message: "Your image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
</code></pre>
<p>我已在您需要在代码中添加的行上方添加了注释。 </p></p>
<p style="font-size: 20px;">关于ios - 如何拍照并同时保存(swift3)，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/42181660/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/42181660/
</a>
</p>
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