by this way you can always get trimmed value no more extension or method required

Trimmed+propertyWrapper.swift

@propertyWrapper
struct Trimmed {
    private(set) var value: String?
    var wrappedValue: String? {
        get {
            return value
        }
        set {
            value = newValue?.trimmingCharacters(in: .whitespacesAndNewlines)
        }
    }
    
    init(wrappedValue initialValue: String?) {
        self.wrappedValue = initialValue
    }
}

struct MyStruct {
    @Trimmed var title: String?
    @Trimmed var body: String?
}


///Usage
//var obj = MyStruct()
//obj.title = "   test   "

//obj.title // Will print "test"