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I am trying to use python interpreter in swift. But it is written in C and thus I have created a bridge between ObjC and Swift. Method in C accepts char * and when I try to pass string to method it says that it accepts only UnsafeMutablePointer. I am trying to convert it like this 

let str = "Hello" as NSString
var buffer = UnsafeMutablePointer<Int8>(str.utf8String)

but Swift compiler says,Cannot invoke initializer for type 'UnsafeMutablePointer' with an argument list of type '(UnsafePointer?)'. What is the proper way of using C data types in Swift and how to solve this problem?

rmaddy
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jj abrahams
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1 Answers1

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It seems to be a duplicate from Here. You can simply use 

let str = "Hello"
let buffer = str.cString(using: .utf8)
Leonardo Silvagni
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