ios - Setting up CIFilter in Swift -

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How to translate the last line of the following ObjC code for a swift: 

  CGAffineTransform transform = CFEfeinttransferTT; CIFF Filter * ClampFilter = [CIFF filter filter name: @ "CIFF clamp"]; [ClampFilter setValue: [NSValue valueWithBytes:, "inputTransform" @and change objctype: @encode (CGAffineTransform)] forKey   
 the following line  
  clampFilter .setValue generates   
.  
 After 
 
  NSValue  is a manufacturer that has a  CGAffineTransform  arguments:  
  transform = CGAffineTransformIdentity go clampFilter = CIFilter (name: "CIAffineClamp") go = value = NSValue (CGAffineTransform: converge) clampFilter.setValue (Val, forKey: Inputtrans  Swift 3:   
  transform = CGAffineTransform.Dientity Let's clampFilter = CIFilter (name: "CIAffineClamp")! Val = NSW (cgAffineTransform: transform) clampFilter.setValue (val, forKey: "inputTransform")

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