Question

我正在尝试使用Swift从OS X将图像文件上传到Parse.com。搜索Parse.com文档（对于OS X），我找到了以下代码：

let imageData = UIImagePNGRepresentation(image)
let imageFile = PFFile(name:"image.png", data:imageData)

var userPhoto = PFObject(className:"UserPhoto")
userPhoto["imageName"] = "My trip to Hawaii!"
userPhoto["imageFile"] = imageFile
userPhoto.saveInBackground()

问题是它使用UIImagePNGRepresentation（），它来自iOS API，而不是OS X.

有没有人知道如何在OS X和Swift上正确地做到这一点？

Answer 1

相当于UIImagePNGRepresentation可能是这样的东西：

let cgImgRef = image.CGImageForProposedRect(nil, context: nil, hints: nil)
let bmpImgRef = NSBitmapImageRep(CGImage: cgImgRef!)
let pngData = bmpImgRef.representationUsingType(NSBitmapImageFileType.NSPNGFileType, properties: [:])

// your code bellow

let imageFile = PFFile(name:"image.png", pngData)

var userPhoto = PFObject(className:"UserPhoto")
userPhoto["imageName"] = "My trip to Hawaii!"
userPhoto["imageFile"] = imageFile
userPhoto.saveInBackground()

对于OS X，iOS的UIImagePNGRepresentation（）相当于什么？

1 个答案: