Check string for nil & empty

Question

Is there a way to check strings for nil and \"\" in Swift? In Rails, I can use blank() to check.

I currently have this, but i

Answer 1

If you are using Swift 2, here is an example my colleague came up with, which adds isNilOrEmpty property on optional Strings:

protocol OptionalString {}
extension String: OptionalString {}

extension Optional where Wrapped: OptionalString {
    var isNilOrEmpty: Bool {
        return ((self as? String) ?? "").isEmpty
    }
}

You can then use isNilOrEmpty on the optional string itself

func testNilOrEmpty() {
    let nilString:String? = nil
    XCTAssertTrue(nilString.isNilOrEmpty)

    let emptyString:String? = ""
    XCTAssertTrue(emptyString.isNilOrEmpty)

    let someText:String? = "lorem"
    XCTAssertFalse(someText.isNilOrEmpty)
}