xclidongbo / countdownbutton

Swift利用DispatchSourceTimer制作定时器,支持纯代码,支持xib,完美解决循环引用造成的内存泄漏

countdownButton

Swift利用DispatchSourceTimer制作定时器

import UIKit

class ViewController: UIViewController {

var sourceTimer: DispatchSourceTimer?

override func viewDidLoad() {
    super.viewDidLoad()
    
    let countdownBtn = ZZCountdownButton(count: 60) { [weak self](_ timer: DispatchSourceTimer) in
        
        self?.sourceTimer = timer
        
        print("发送网络请求")
    }
    
    countdownBtn.sizeToFit()
    countdownBtn.center = view.center
    
    view.addSubview(countdownBtn)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    
    self.sourceTimer?.cancel()
}

deinit {
    print("控制器出栈了")
}

}