在已保存的照片上打印图像(swift3)
问题描述:
现在,我的代码只需拍摄一张照片并将其保存到照片库中。我想在照片右下角的照片上打印一张照片。这张照片被称为“logo.png”。这就像有线电视新闻中的三分之一一样。在已保存的照片上打印图像(swift3)
import UIKit
import AVFoundation
class ViewController: UIViewController,AVCapturePhotoCaptureDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UITextFieldDelegate {
var captureSesssion : AVCaptureSession!
var cameraOutput : AVCapturePhotoOutput!
var previewLayer : AVCaptureVideoPreviewLayer!
@IBOutlet var sa: 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 = CGRect(x: 10, y: 10, width: 700, height: 700)
sa.layer.addSublayer(previewLayer)
captureSesssion.startRunning()
}}}}
@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)
}
func imagex(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
}
func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: Error?) {
if let sampleBuffer = photoSampleBuffer,
let previewBuffer = previewPhotoSampleBuffer,
let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
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)
UIImageWriteToSavedPhotosAlbum(image, self, #selector(self.imagex(_:didFinishSavingWithError:contextInfo:)), nil)
} } }
答
您必须使用图形上下文。这是我笔记中的一个通用示例。这是非常有用的合成图像,只是适应它做你想要它的工作(这将是在右上角设置您的自定义图像(在我的情况下图像1)。)
var image1 = UIImage(named: "image1.png")
var imageBase = yourImageView.image
var size = yourImageView.frame.size
UIGraphicsBeginImageContext(size)
let areaSize = CGRect(x: 0, y: size.width - (size.width/4), width: (size.width/4), height:(size.height/4))
image1!.drawInRect(areaSize)
imageBase!.drawInRect(areaSize, blendMode: CGBlendMode.Normal, alpha: 0.8)
var newImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
我会把这有什么功能imagex还是捕获? @juanCurti –
这是一样的。您应该在确定图像完美保存后写下。 –
因此,如果它只是在捕获或imagex中,只需要处理其中一个函数,那并不重要。 @juanCurti –