Swift:Value of Type String can never be nil,Comparison isn't allowed

Question

This is my code

func enteredByStr(S:String) -> String? {
    var healthactionplan : MyHealthActionPlanCondition

    if healthactionplan.addedBy != nil  {
        healthactionplan.addedBy = "System"
    } else {
        healthactionplan.addedBy = "Member"
    }
}

I have even followed this This and This. But still remains Unsolvable.Can anyone explain Why???

What does the declaration of `MyHealthActionPlanCondition` look like? — 0x416e746f6e, Nov 29 '16 at 12:36
Among the other problems, you are not populating `healthactionplan` — Luca Angeletti, Nov 29 '16 at 12:46

score 5 · Answer 1 · answered Nov 29 '16 at 12:40

Value of Type String can never be nil,Comparison isn't allowed

Error message is showing you everything

addedBy is a String. so check isEmpty on addedBy

 if healthactionplan.addedBy.isEmpty   {
    healthactionplan.addedBy = "System"
} else {
    healthactionplan.addedBy = "Member"
}

Bhavin Bhadani · Answer 2 · 2016-11-30T04:40:11.547

4

I think healthactionplan.addedBy is String as error said Value of Type String can never be nil that means you can't compare String with nil .. so try to check that string is empty or not

 if healthactionplan.addedBy.isEmpty { 
      healthactionplan.addedBy = "Member"
 } else {
      healthactionplan.addedBy = "System"
 }

edited Nov 30 '16 at 04:40

answered Nov 29 '16 at 12:37

Bhavin Bhadani

22,224
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score 0 · Answer 3 · answered Dec 09 '16 at 05:30

0

In my example the string cannot be nil. I need to declare a string which can accept nil. So i have declared optional string:

var addedBy: String? = String()

After this i am able to check the nil value for the string.

answered Dec 09 '16 at 05:30

Niroj

1,114
6
29

Swift:Value of Type String can never be nil,Comparison isn't allowed

3 Answers3