var str ="15037919912"
letstartIndex = str.index(str.startIndex, offsetBy:3)
letendIndex = str.index(str.startIndex, offsetBy:6)
let range = startIndex...endIndex
//str.replaceSubrange(range, with: "Object -")
str.replaceSubrange(range, with:"****")
print("替换范围后的+\(str)")//150****9912
var str1 = "410311199301095011"
letstartIndexs = str1.index(str1.startIndex, offsetBy:6)
letendIndexs = str1.index(str1.startIndex, offsetBy:13)
let ranges = startIndexs...endIndexs
str1.replaceSubrange(ranges, with:"********")
print("替换范围后的+\(str1)")//410311********5011
