//
// ViewController.swift
// 缓存类使用
//
// Created by admin on 16/2/24.
// Copyright © 2016年 jin. All rights reserved.
//
import UIKit
class ViewController: UIViewController{
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
let queue = NSOperationQueue()
let operation = MyOperation()
queue.addOperation(operation)
// 线程执行完毕调用的方法
operation.completionBlock = {
()->(Void) in
print("线程执行完毕,输出信息")
}
}
}
class MyOperation: NSOperation {
// 注意点:需要自己手动添加自动释放池
// 自定义的操作,可以取消
override func main() {
super.main()
func autorelasepool(code:()->(Void)){
code()
}
autorelasepool { () -> (Void) in
// 如果操作在队列里,还没有调度,就直接return
if self.cancelled == true
{
return
}
NSThread.sleepForTimeInterval(2)
print("执行结束")
}
}
}