NSTimer 错误（Swift：Xcode）

Question

我正在制作一个计时器，它将重复调用一个函数 swift 2，Xcode 7。此函数发送本地推送通知。我的计时器变量在 ViewController.swift 中的 viewDidLoad() 之外声明。

var timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self ,       selector: Selector("notification"), userInfo: nil, repeats: true)

我收到一个错误：

参数类型 'NSObject -> () -> ViewController 不符合预期类型 'AnyObject'

目标自身似乎有问题，因为它以红色突出显示。

如果需要，这是我的完整代码：

import UIKit

class ViewController: UIViewController {

var time = 10
 var timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self , selector: Selector("notification"), userInfo: nil, repeats: true)

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.


}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func btnPressed(sender: AnyObject) {
 let alertView = UIAlertController(title: "You won!", message: "Press Go to continue!", preferredStyle: UIAlertControllerStyle.Alert)
    self.presentViewController(alertView, animated: true, completion: nil)

    alertView.addAction(UIAlertAction(title: "Go", style: UIAlertActionStyle.Default, handler: nil))

}

func notification(){
    time--
    if (time == 0){


    let notification = UILocalNotification()
    notification.alertAction = "Go back to App!"
    notification.alertBody = "Pls Go back to my App!"
    notification.fireDate = NSDate(timeIntervalSinceNow: 0)

    UIApplication.sharedApplication().scheduleLocalNotification(notification)
        timer.invalidate()

}
}

}

提前致谢:)

Answer 1

尝试声明 var timer only setting as NSTimer.init() like:

var timer = NSTimer.init()

然后，将 scheduledTimerWithInterval 的初始化放在 viewDidLoad():

override func viewDidLoad() {
    super.viewDidLoad()
    timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "notification", userInfo: nil, repeats: true)
}

NSTimer 错误（Swift：Xcode）

Error in NSTimer (Swift: Xcode)

nstimer

ios

xcode7

swift2