Timer Won't Call Selector Function
<p>I'm not sure why but every time I run my application, my timer will not call the update function. I have tried everything: using #selector, adding a colon at the end of update, nothing is working.  I have added a print statement inside my update to make sure that it reaches there, and the print statement never prints! I'm not sure why it isn't being called.... Help! P.S. I know selected is indeed one of the options in the if statement, I had a print statement for that and it's working.</p>

<pre><code> if (selected == "05 seconds") {
        count = 5
        timer = Timer(timeInterval: 1.0, target: self, selector: Selector("update"), userInfo: nil, repeats: true)

    }
    else if (selected == "10 seconds") {
        count = 10
        timer = Timer(timeInterval: 1.0, target: self, selector: Selector("update"), userInfo: nil, repeats: true)
    }
    else if (selected == "20 seconds") {
        count = 20
        timer = Timer(timeInterval: 1.0, target: self, selector: Selector("update"), userInfo: nil, repeats: true)
    }
    else if (selected == "30 seconds") {
        print("I'm here!")
        count = 30
        timer = Timer(timeInterval: 1.0, target: self, selector: Selector("update"), userInfo: nil, repeats: true)
    }
    else if (selected == "Single Shot") {
        SendButton.isHidden = false
        countDownLabel.isHidden = true
    }
}
   func update() {
    print("Now I'm in update!")
    count = count - 1;
    countDownLabel.text = String(count)
}
</code></pre>