使用NSTimer在操场上打印到控制台

时间:2016-03-29 00:41:39

标签: swift

鉴于功能" printTime"打印3个语句(H / M / S)每秒使用NSTimer中断调用此函数的确切语法是什么?

1 个答案:

答案 0 :(得分:2)

试试这个:

String url = "https://play.google.com/store/apps";
        final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        startActivity(intent);

您需要将import Foundation import XCPlayground class Wrapper: NSObject { static let formatter: NSDateFormatter = { let formatter = NSDateFormatter() formatter.dateFormat = "HH:mm:ss" return formatter }() class func printTime() { print(formatter.stringFromDate(NSDate())) } } let timer = NSTimer.scheduledTimerWithTimeInterval(1, target: Wrapper.self, selector: #selector(Wrapper.printTime), userInfo: nil, repeats: true) XCPlaygroundPage.currentPage.needsIndefiniteExecution = true 函数包装在对象中以发送到printTime。当你改变游乐场的代码时,循环将结束。