Question

我正在尝试在Swift中创建一个计时器，我无法弄清楚该格式如何与NStimer一起使用。我想以00格式输出时间，所以当它增加时它就像：00 - ＆gt; 01 - ＆gt; 02 - ＆gt; .....-＆gt; 10 - ＆gt; 11 - ＆gt; ... 这是我的代码：

import UIKit
import Foundation


@IBOutlet var label : UILabel!
@IBOutlet var label_c : UILabel!
@IBOutlet var button : UIButton!
var count : Double = 0.0
var time : NSTimer!

@IBAction func countI(){
    time = NSTimer.scheduledTimerWithTimeInterval(0.01, target: self, selector: "countS", userInfo: nil, repeats: true)
}

@IBAction func countS(){
    count += 0.01
    let s = String(format: "%02d", count%100)
    label.text = toString(count)
    label_c.text = s
}

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.
}

Answer 1

它看起来像是一个类型错误 - %d需要一个整数但你传递的是双倍。

您可以将结果转换为Int，这应该有效：

let s = String(format: "%02d", Int(count%100))

如何在Swift中正确格式化NStimer？

1 个答案: