如何使用ios swift将字符串转换为MD5哈希

I want to convert user input or assume any string like "abc" to MD5 hash. I want to do this in ios swift. I have refered the below links but the solutions are not working for me or I am confused to implement it properly as i am new to swift programing. Could someone help me with clear steps to achieve this. Thanks in advance!I want to convert user input or assume any stri