Swift-将图像数据转换为二进制数

Question

Is it possible to take an image and convert its data to Binary?

I was able to convert an image's data to a String , but I'm not sure how to now take that String and display its Binary equivalent.

For that matter, if I type in a word - any word, like for example "Hello", I'd like the App to display the FIVE binary numbers that make it up:
-the first number would be the binary number (or binary code) for the letter "H"
-the second number would be the binary number for the letter "e"
-the third number would be the binary number for the letter "l"

etc.

Answer 1

You can get the binary data from a String like,

let str = "hello"
let data = str.data(using: .utf8)

In case you want to get the binary data in the form of 0/1, you can use,

data?.forEach({ print(String($0, radix: 2)) })

The above code prints the binary numbers corresponding to each byte in data .

Edit:

To get 8 characters long binary numbers , you just need to append extra 0s to the start of the string , ie

let binaryArr = data?.map({(byte) -> String in
    var str = String(byte, radix: 2)
    let countToAppend = 8 - str.count
    let extraZerosStr = ([String](repeating: "0", count: countToAppend)).joined()
    str = extraZerosStr + str
    return str
})

print(binaryArr) //for "Hello", it prints ["01001000", "01100101", "01101100", "01101100", "01101111"]