1 let product1 = (20, "iPhone6", 5888);
2 let product_name = "iPhone7"
3 var product2 = (30, "\(product_name)",18888);
4 println(product1);
5 println(product2);

1 let (id1, name1, price1) = product2 //3个值分别赋予这三个常量
2 println("id1=\(id1),name1=\(name1),price1=\(price1)");
3 
4 let (_, name2, _)= product1 //只需要name变量，其他用下滑线表示
5 println("name2=\(name2)");

1 let product3 = (30, name:"iPhone8", price:5988)
2 
3 println(product3.name);
4 println(product3.price);