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iOSͰͷ ը૾Ξοϓϩʔυ

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cockscomb

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iOSͰͷ ը૾Ξοϓϩʔυ

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ԿΛ͍·͞Β w J04ͷਐԽʹ൐ͬͯ࠷৽ͷख๏Λ঺հ͍ͨ͠ w ϕετϓϥΫςΟεͰ͢

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ը૾Ξοϓϩʔυͷखॱ 1IPUP-JCSBSZ͔ΒσʔλΛऔಘ ը૾ͷՃ޻ ਖ਼͍͠޲͖ʹճస ඞཁͳαΠζʹॖখ ద੾ͳܗࣜʹѹॖ Ξοϓϩʔυ

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σʔλΛऔಘ • UIImagePickerController • UIImagePickerControllerOriginalImage • UIImagePickerControllerEditedImage • AssetsLibrary • Photos

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σʔλΛऔಘ let asset: PHAsset var originalData: NSData? var type: UTI? var imageOrientation: UIImageOrientation = .Up let options = PHImageRequestOptions() options.synchronous = true options.version = .Current let imageManager = PHImageManager.defaultManager() imageManager.requestImageDataForAsset(asset, options: options) { (imageData, dataUTI, orientation, info) -> Void in originalData = imageData type = UTI(dataUTI) imageOrientation = orientation }

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ը૾ͷՃ޻ w 6*,JU w $PSF(SBQIJDT w $PSF*NBHF

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ਖ਼͍͠޲͖ʹճస var image = CIImage(CGImage: originalImage) // See: kCGImagePropertyOrientation var orientationValue: Int32 = 1 switch orientation { case .Up: break case .Down: orientationValue = 3 case .Left: orientationValue = 8 case .Right: orientationValue = 6 ... } image = image.imageByApplyingOrientation(orientationValue)

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ඞཁͳαΠζʹॖখ var image: CIImage let scale: CGFloat = 0.5 let lanczosResamplingFilter = CIFilter( name: "CILanczosScaleTransform", withInputParameters: [ "inputImage" : image, "inputScale" : scale, ]) image = lanczosResamplingFilter.outputImage

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ద੾ͳܗࣜʹѹॖ let context = CIContext(options: [:]) let scaledImage = context.createCGImage(image, fromRect: image.extent()) let processedData = NSMutableData() let destination = CGImageDestinationCreateWithData( processedData, type.UTIString, 1, nil) CGImageDestinationAddImage(destination, scaledImage, [ kCGImageDestinationLossyCompressionQuality as String : 0.8, ] as [ String : AnyObject ]) CGImageDestinationFinalize(destination)

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Ξοϓϩʔυ w ϚϧνύʔτϦΫΤετͱ͔Ͱ w ͦΕͧΕ͕Μ͹Δ

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ը૾Ξοϓϩʔυͷखॱ 1IPUP-JCSBSZ͔ΒσʔλΛऔಘ ը૾ͷՃ޻ ਖ਼͍͠޲͖ʹճస ඞཁͳαΠζʹॖখ ద੾ͳܗࣜʹѹॖ Ξοϓϩʔυ

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௥ิ w શମΛNSOperationͷαϒΫϥεͳͲͰ࡞Δͱ Α͍ w $PSF*NBHFΛ࢖͏ͱ͖ɺՄೳͳΒCIContext ͸࢖͍ճ͢ͱΑ͍

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iOSͰͷ ը૾Ξοϓϩʔυ