swift - Dynamic vars copy object -

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एक वर्ग में एक गतिशील var घोषित करते समय 

  गतिशील var चयनित एलेमेंट: तत्व?

और फिर कॉलिंग 

  self.selectedElement = e

एक अपवाद में परिणाम 

  - [एप। एलेमेंट कॉपी विथ ज़ोन:]: अज्ञात चयनकर्ता को उदाहरण के लिए भेजा गया

गतिशील वार्स हमेशा कॉपी किए गए हैं - और यदि हाँ, तो यह दस्तावेज कहां है?


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