详解 swift3.0 可选绑定共用同一块内存空间的实例

详解 swift3.0 可选绑定共用同一块内存空间的实例

示例代码：

ljtempmodel = usermodel.init(username: "sww", userid: 12, phone: "123", email: "deew") 
 ljtempmodel?.ljarray.append("sww") 
 print("可选绑定前:\(ljtempmodel?.ljarray)") 
 
 //可选绑定成功，然后赋值 
 if let modle : usermodel = ljtempmodel{ 
  
  modle.ljarray.append("123") 
  
  print("可选绑定后:\(string(describing: ljtempmodel?.ljarray))") 
 
  print("\(modle.ljarray)可选绑定成功，然后赋值") 
 //此处modle 和ljtempmodel有相同的内存地址空间，所以对modle添加“123”，就相当于对ljtempmodel添加“123”，实际打印结果也是如此 
 }else{ 
  //绑定失败 
  print("可选绑定失败") 
 } 

import foundation 
 
 
open class usermodel : nsobject { 
 var username: string  ///< store user's name, optional 
 var userid: int   ///< store user's id 
 var phone: string?  ///< store user's telephone number 
 var email: string?  ///< store user's email 
 var responsedata = nsmutabledata() 
 var ljarray = array<any>() 
  
  
 // designated initializer 
 init(username: string, userid: int, phone: string?, email: string?) { 
  self.username = username 
  self.userid = userid 
  self.phone = phone 
  self.email = email 
   
  super.init() 
 } 
} 

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