iOS swift 5: 關於 Debug Mode prinf function

iOS swift 5: 關於 Debug Mode prinf function

 swift 沒有C++的 redefine function 功能
 所以只能下面方式來暫用
 另一種方式使用 swift 內建的 debugPrint()

 解決方案來源:
  Swift: Extending functionality of print() function
  STRIPPING PRINT AND DEBUGPRINT IN SWIFT FOR RELEASE BUILDS
  Swift print, println, NSLog

public func debugPrint(_ items: Any..., separator: String = " ", terminator: String = "\n")

import Foundation
public func DPrint(_ items: Any..., separator: String = " ", terminator: String = "\n") 
{
 #if DEBUG // for Debug Mode
  let output = items.map { "\($0)" }.joined(separator: separator)
  Swift.print(output, terminator: terminator)
 #else     // for Relase Mode
  // ...
 #endif
}
public func RPrint(_ items: Any..., separator: String = " ", terminator: String = "\n") 
{
 #if DEBUG // for Debug Mode
 #else     // for Relase Mode
  let output = items.map { "\($0)" }.joined(separator: separator)
  Swift.print(output, terminator: terminator)
 #endif
}

import Foundation
class MyViewController: UIViewController 
{
  func MyFun()
  {
   print("FUNC: \(#file),\(#function)")
   debugPrint("FUNC: \(#file),\(#function)")
   DPrint("FUNC: \(#file),\(#function)")
   RPrint("FUNC: \(#file),\(#function)")
  }
}