问题
// compressing image(avaImg)before sending it to the server(Parse)
let avaData = UIImageJPEGRepresentation(avaImg.image!, 0.5)
let avaFile = PFFile(name: "ava.jpg", data: avaData!)
user["ava"] = avaFile
When I replace it to the following line as recommended by the notifications I get the error below
let avaData = UIImage.jpegData(avaImg.image!, 0.5)
ERROR: Instance member 'jpegData' cannot be used on type 'UIImage'; did you mean to use a value of this type instead?
I'm a newbie and I followed that on an online course so please baby steps!
回答1:
Do you mean swift 4.2?
Call it like this yourImageObject.jpegData(compressionQuality: 0.5) because function changed to public func jpegData(compressionQuality: CGFloat) -> Data? For more syntax I have a repo you can take a reference with changes from swift 4. https://github.com/alexliubj/Swift-Migration-4.2
Updated: This API change is from iOS 12, not Swift 4.2. Thanks @rmaddy for your correction.
来源：https://stackoverflow.com/questions/52116351/compress-image-in-ios-12-how-will-this-code-be-updated