Swift中字符串插值的写法

 1 let coordinate = (1,1)
 2 switch coordinate
 3 {
 4 case(0,0):
 5     print("It‘s origin!")
 6 case(_,0):
 7     print("(\(coordinate.0),0) is on the x-axis")
 8 case(0,_):
 9     print("\(coordinate.1) in on the y-axis")
10 default:
11     print("\(coordinate.0),\(coordinate.1) is just an ordinary coordinate")
12 }