{"id":3141,"date":"2021-06-08T13:38:14","date_gmt":"2021-06-08T05:38:14","guid":{"rendered":"http:\/\/123.57.164.21\/?p=3141"},"modified":"2021-06-08T13:38:14","modified_gmt":"2021-06-08T05:38:14","slug":"swift-%e5%ae%9e%e7%8e%b0%e4%bb%a3%e7%a0%81%e7%9a%84%e5%bb%b6%e8%bf%9f%e6%89%a7%e8%a1%8c%ef%bc%88%e9%99%84%e6%a0%b7%e4%be%8b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=3141","title":{"rendered":"Swift &#8211; \u5b9e\u73b0\u4ee3\u7801\u7684\u5ef6\u8fdf\u6267\u884c\uff08\u9644\u6837\u4f8b\uff09"},"content":{"rendered":"\n<p>\u6709\u65f6\u6211\u4eec\u60f3\u8ba9\u4e00\u6bb5\u4ee3\u7801\u6216\u8005\u4e00\u4e2a\u65b9\u6cd5\u63a8\u8fdf\u4e00\u6bb5\u65f6\u95f4\u6267\u884c\uff0c\u6700\u7b80\u5355\u7684\u5c31\u662f\u4f7f\u7528\u00a0<strong>GCD\u00a0<\/strong>\u63d0\u4f9b\u7684\u5ef6\u65f6\u8c03\u7528\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002<br><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">1\uff0c\u57fa\u672c\u7528\u6cd5<\/h5>\n\n\n\n<p>\uff081\uff09\u4e0b\u9762\u4ee3\u7801\u5728\u7a0b\u5e8f\u8fd0\u884c\u540e\u6253\u5370\u51fa\u5f53\u524d\u65f6\u95f4\uff0c\u7136\u540e\u7b49\u5f85\u4e2a<strong>\u00a05<\/strong>\u00a0\u79d2\u949f\u518d\u6b21\u6253\u5370\u65f6\u95f4\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import UIKit\n \nclass ViewController: UIViewController{\n     \n    override func viewDidLoad() {\n        super.viewDidLoad()\n         \n        print(\"\u65f6\u95f41\uff1a\", Date())\n         \n        \/\/\u5ef6\u8fdf5\u79d2\u6267\u884c\n        DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 5) {\n            print(\"\u65f6\u95f42\uff1a\", Date())\n        }\n    }\n}<\/pre>\n\n\n\n<p>\uff082\uff09\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a\u00a0<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2021\/06\/image-29.png\" alt=\"\" class=\"wp-image-3142\" width=\"414\" height=\"147\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-29.png 592w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-29-300x106.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-29-230x82.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-29-350x124.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2021\/06\/image-29-480x170.png 480w\" sizes=\"(max-width: 414px) 100vw, 414px\" \/><\/figure><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">2\uff0c\u5c01\u88c5\u4e00\u4e2a\u5168\u5c40\u65b9\u6cd5<\/h5>\n\n\n\n<p>\uff081\uff09\u4e3a\u65b9\u4fbf\u4f7f\u7528\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5c01\u88c5\u4e00\u4e2a\u5168\u5c40\u7684\u00a0<strong>delay()<\/strong>\u00a0\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import Foundation\n \n\/\/\/ \u4ee3\u7801\u5ef6\u8fdf\u8fd0\u884c\n\/\/\/\n\/\/\/ - Parameters:\n\/\/\/   - delayTime: \u5ef6\u65f6\u65f6\u95f4\u3002\u6bd4\u5982\uff1a.seconds(5)\u3001.milliseconds(500)\n\/\/\/   - qosClass: \u8981\u4f7f\u7528\u7684\u5168\u5c40QOS\u7c7b\uff08\u9ed8\u8ba4\u4e3a nil\uff0c\u8868\u793a\u4e3b\u7ebf\u7a0b\uff09\n\/\/\/   - closure: \u5ef6\u8fdf\u8fd0\u884c\u7684\u4ee3\u7801\npublic func delay(by delayTime: TimeInterval, qosClass: DispatchQoS.QoSClass? = nil,\n                  _ closure: @escaping () -> Void) {\n    let dispatchQueue = qosClass != nil ? DispatchQueue.global(qos: qosClass!) : .main\n    dispatchQueue.asyncAfter(deadline: DispatchTime.now() + delayTime, execute: closure)\n}<\/pre>\n\n\n\n<p>\uff082\uff09\u4e0b\u9762\u662f\u4f7f\u7528\u6837\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/\u5ef6\u8fdf5\u79d2\u6267\u884c\uff08\u5728\u4e3b\u7ebf\u7a0b\u4e0a\uff09\ndelay(by: 5) {\n    print(\"\u65f6\u95f41\uff1a\", Date())\n}\n         \n\/\/\u5ef6\u8fdf5\u79d2\u6267\u884c\uff08\u5728\u5168\u5c40\u961f\u5217\u4e0a\uff0c\u4e14\u4f18\u5148\u7ea7\u9ad8\uff09\ndelay(by: 5, qosClass: .userInitiated) {\n    print(\"\u65f6\u95f42\uff1a\", Date())\n}\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u65f6\u6211\u4eec\u60f3\u8ba9\u4e00\u6bb5\u4ee3\u7801\u6216\u8005\u4e00\u4e2a\u65b9\u6cd5\u63a8\u8fdf\u4e00\u6bb5\u65f6\u95f4\u6267\u884c\uff0c\u6700\u7b80\u5355\u7684\u5c31\u662f\u4f7f\u7528\u00a0GCD\u00a0\u63d0\u4f9b\u7684\u5ef6\u65f6\u8c03\u7528\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002 1\uff0c\u57fa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,8],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3141"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3141"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3141\/revisions"}],"predecessor-version":[{"id":3143,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/3141\/revisions\/3143"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}