Print the size (megabytes) of Data in Swift

Question

I have a variable fileData of Data type and I am struggling to find how to print the size of this.

In the past NSData you would print the length but unable to do that with this type.

How to print the size of a Data in Swift?

Answer 1

Use yourData.count and divide by 1024 * 1024. Using Alexanders excellent suggestion:

    func stackOverflowAnswer() {       if let data = #imageLiteral(resourceName: "VanGogh.jpg").pngData() {       print("There were \(data.count) bytes")       let bcf = ByteCountFormatter()       bcf.allowedUnits = [.useMB] // optional: restricts the units to MB only       bcf.countStyle = .file       let string = bcf.string(fromByteCount: Int64(data.count))       print("formatted result: \(string)")       }     } 

With the following results:

There were 28865563 bytes formatted result: 28.9 MB 

Answer 2

If your goal is to print the size to the use, use ByteCountFormatter

import Foundation  let byteCount = 512_000 // replace with data.count let bcf = ByteCountFormatter() bcf.allowedUnits = [.useMB] // optional: restricts the units to MB only bcf.countStyle = .file let string = bcf.string(fromByteCount: Int64(byteCount)) print(string)