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Image uploading on iOS
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cockscomb
May 21, 2015
Programming
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1.7k
Image uploading on iOS
Presented at 関西モバイルアプリ研究会 #2
cockscomb
May 21, 2015
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Transcript
iOSͰͷ ը૾Ξοϓϩʔυ
cockscomb
None
iOSͰͷ ը૾Ξοϓϩʔυ
ԿΛ͍·͞Β w J04ͷਐԽʹͬͯ࠷৽ͷख๏Λհ͍ͨ͠ w ϕετϓϥΫςΟεͰ͢
ը૾Ξοϓϩʔυͷखॱ 1IPUP-JCSBSZ͔ΒσʔλΛऔಘ ը૾ͷՃ ਖ਼͍͖͠ʹճస ඞཁͳαΠζʹॖখ
దͳܗࣜʹѹॖ Ξοϓϩʔυ
σʔλΛऔಘ • UIImagePickerController • UIImagePickerControllerOriginalImage • UIImagePickerControllerEditedImage • AssetsLibrary •
Photos
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 }
ը૾ͷՃ w 6*,JU w $PSF(SBQIJDT w $PSF*NBHF
ਖ਼͍͖͠ʹճస 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)
ඞཁͳαΠζʹॖখ var image: CIImage let scale: CGFloat = 0.5 let
lanczosResamplingFilter = CIFilter( name: "CILanczosScaleTransform", withInputParameters: [ "inputImage" : image, "inputScale" : scale, ]) image = lanczosResamplingFilter.outputImage
దͳܗࣜʹѹॖ 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)
Ξοϓϩʔυ w ϚϧνύʔτϦΫΤετͱ͔Ͱ w ͦΕͧΕ͕ΜΔ
ը૾Ξοϓϩʔυͷखॱ 1IPUP-JCSBSZ͔ΒσʔλΛऔಘ ը૾ͷՃ ਖ਼͍͖͠ʹճస ඞཁͳαΠζʹॖখ
దͳܗࣜʹѹॖ Ξοϓϩʔυ
ิ w શମΛNSOperationͷαϒΫϥεͳͲͰ࡞Δͱ Α͍ w $PSF*NBHFΛ͏ͱ͖ɺՄೳͳΒCIContext ͍ճ͢ͱΑ͍
iOSͰͷ ը૾Ξοϓϩʔυ