A workaround for iOS 8.x, which cannnot use `q` parameter as the label of pin. (Swift 2.2)

Map.swift

import Foundation

public func buildMapUrl(
    latitude latitude: Double,
    longitude: Double,
    label: String
) -> NSURL? {
    let components = NSURLComponents(string: "http://maps.apple.com/")

    if #available(iOS 9, *) {
        components?.queryItems = [
            NSURLQueryItem(
                name: "ll",
                value: "\(latitude),\(longitude)"
            ),
            NSURLQueryItem(name: "q", value: label),
        ]
    } else {
        components?.queryItems = [
            NSURLQueryItem(
                name: "q",
                value: "\(latitude),\(longitude)"
            ),
        ]
    }

    return components?.URL
}

The query. This parameter is treated as if its value had been typed into the Maps search field by the user. Note that q=* is not supported
The q parameter can also be used as a label if the location is explicitly defined in the ll or address parameters.

https://developer.apple.com/library/ios/featuredarticles/iPhoneURLScheme_Reference/MapLinks/MapLinks.html (Updated: 2015-06-08)