{"id":380,"date":"2025-05-31T10:50:14","date_gmt":"2025-06-05T03:24:14","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=380"},"modified":"2025-06-05T10:50:14","modified_gmt":"2025-06-05T03:24:14","slug":"%e6%95%99%e5%ad%b8-swift-delegate-%e6%a9%9f%e5%88%b6%e4%bb%a3%e7%90%86%e5%92%8c-protocol%e5%8d%94%e8%ad%b0","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e6%95%99%e5%ad%b8-swift-delegate-%e6%a9%9f%e5%88%b6%e4%bb%a3%e7%90%86%e5%92%8c-protocol%e5%8d%94%e8%ad%b0\/","title":{"rendered":"\u30102025 \u6700\u65b0\u7248\u3011Swift Delegate \u6a5f\u5236\u8207 Protocol \u6559\u5b78\uff1a\u5f9e\u7236\u985e\u5225\u5230\u5b50\u985e\u5225\u7684\u4e92\u52d5"},"content":{"rendered":"

“`html<\/p>\n

\u524d\u8a00<\/h1>\n

\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e Swift \u7684 delegate \u6a5f\u5236\u8207 protocol \u4f7f\u7528\u65b9\u6cd5\u3002\u9019\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u8a2d\u8a08\u6a21\u5f0f\uff0c\u80fd\u5920\u8b93\u7236\u985e\u5225\u8207\u5b50\u985e\u5225\u4e4b\u9593\u6709\u6548\u5730\u9032\u884c\u6578\u64da\u50b3\u905e\u548c\u4e8b\u4ef6\u8655\u7406\u3002\u96a8\u8457 Swift \u8a9e\u8a00\u7684\u6f14\u9032\uff0c\u672c\u6587\u5c07\u4f7f\u7528 **2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10** \u4f86\u78ba\u4fdd\u4f60\u80fd\u638c\u63e1\u9019\u9805\u6280\u8853\u3002<\/p>\n

\u7236\u985e\u5225\u547c\u53eb\u5b50\u985e\u5225<\/h2>\n

\u5728 Swift \u4e2d\uff0c\u7236\u985e\u5225\u547c\u53eb\u5b50\u985e\u5225\u7684\u65b9\u6cd5\u975e\u5e38\u76f4\u63a5\u3002\u4f60\u53ef\u4ee5\u5275\u5efa\u5b50\u985e\u5225\u7684\u5be6\u4f8b\uff0c\u7136\u5f8c\u76f4\u63a5\u8abf\u7528\u5b50\u985e\u5225\u7684\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728\u7236\u985e\u5225\u4e2d\u4f7f\u7528\u5b50\u985e\u5225\u7684\u65b9\u6cd5\uff1a<\/p>\n

“`swift
\nlet testView = TestView(frame: CGRect(x: self.view.frame.origin.x, y: self.view.frame.origin.y, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height))
\nprint(testView.testFunc())
\n“`
\n\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5275\u5efa\u4e86\u4e00\u500b `TestView` \u7684\u5be6\u4f8b\u4e26\u8abf\u7528\u4e86\u5176 `testFunc()` \u65b9\u6cd5\u3002<\/p>\n

\u5b50\u985e\u5225\u547c\u53eb\u7236\u985e\u5225<\/h2>\n

\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5b50\u985e\u5225\u9700\u8981\u5411\u7236\u985e\u5225\u50b3\u905e\u4fe1\u606f\uff0c\u9019\u6642\u53ef\u4ee5\u901a\u904e delegate \u6a5f\u5236\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u5177\u9ad4\u6b65\u9a5f\uff1a<\/p>\n

1. \u5728\u7236\u985e\u5225\u7684 `viewDidLoad()` \u65b9\u6cd5\u4e2d\u521d\u59cb\u5316\u5b50\u985e\u5225\uff0c\u4e26\u8a2d\u7f6e\u5176 delegate\u3002<\/p>\n

“`swift
\noverride func viewDidLoad() {
\n super.viewDidLoad()
\n let testView = TestView(frame: CGRect(x: self.view.frame.origin.x, y: self.view.frame.origin.y, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height))
\n testView.delegate = self
\n self.view.addSubview(testView)
\n}
\n“`<\/p>\n

2. \u5728\u7236\u985e\u5225\u4e2d\u65b0\u589e\u4e00\u500b\u65b9\u6cd5\uff0c\u6e96\u5099\u63a5\u6536\u5b50\u985e\u5225\u7684\u8abf\u7528\u3002<\/p>\n

“`swift
\nfunc fatherFunc() -> String {
\n return “fatherFunc”
\n}
\n“`<\/p>\n

3. \u5728\u5b50\u985e\u5225\u4e2d\u5b9a\u7fa9\u4e00\u500b protocol\uff0c\u4e26\u5728\u985e\u4e2d\u8072\u660e delegate\u3002<\/p>\n

“`swift
\nprotocol TakoProtocol {
\n func fatherFunc() -> String
\n}<\/p>\n

class TestView: UIView {
\n var delegate: TakoProtocol?<\/p>\n

@IBAction func clickTestBtn(_ sender: Any) {
\n if let result = delegate?.fatherFunc() {
\n print(result)
\n }
\n }
\n}
\n“`<\/p>\n

\u7576\u4f60\u9ede\u64ca\u6309\u9215\u6642\uff0c\u5c07\u6703\u8abf\u7528\u7236\u985e\u5225\u7684 `fatherFunc()` \u65b9\u6cd5\uff0c\u4e26\u8f38\u51fa\u7d50\u679c\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664<\/h2>\n

\u5982\u679c\u4f60\u5728\u4f7f\u7528 delegate \u6642\u9047\u5230\u932f\u8aa4\uff0c\u8acb\u6aa2\u67e5\u4ee5\u4e0b\u5e7e\u9ede\uff1a
\n– \u78ba\u4fdd delegate \u5df2\u6b63\u78ba\u8a2d\u7f6e\uff08\u4f8b\u5982\uff0c`testView.delegate = self`\uff09\u3002
\n– \u78ba\u8a8d\u7236\u985e\u5225\u7b26\u5408 delegate \u7684\u5354\u8b70\uff08protocol\uff09\u3002
\n– \u78ba\u4fdd\u5728\u8abf\u7528 delegate \u65b9\u6cd5\u4e4b\u524d\uff0cdelegate \u6c92\u6709\u70ba nil\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

\u9019\u7a2e delegate \u6a5f\u5236\u4e0d\u50c5\u9650\u65bc UI \u7684\u4e8b\u4ef6\u8655\u7406\uff0c\u9084\u53ef\u4ee5\u7528\u65bc\u8a31\u591a\u4e0d\u540c\u7684\u5834\u666f\uff0c\u4f8b\u5982\uff1a
\n– \u7db2\u7d61\u8acb\u6c42\u7684\u56de\u8abf\u3002
\n– \u6578\u64da\u8655\u7406\u7684\u901a\u77e5\u3002
\n– \u7528\u6236\u4ea4\u4e92\u7684\u53cd\u61c9\u3002<\/p>\n

\u9019\u6a23\u7684\u8a2d\u8a08\u6a21\u5f0f\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u7d50\u69cb\u66f4\u6e05\u6670\uff0c\u4e26\u63d0\u9ad8\u4e86\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n

\u7d50\u8ad6<\/h2>\n

\u900f\u904e\u4ee5\u4e0a\u7684\u793a\u4f8b\u548c\u89e3\u91cb\uff0c\u4f60\u61c9\u8a72\u80fd\u5920\u638c\u63e1 Swift \u4e2d\u7684 delegate \u6a5f\u5236\u53ca\u5176\u61c9\u7528\u3002\u9019\u662f\u958b\u767c iOS \u61c9\u7528\u7a0b\u5e8f\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u4e00\u90e8\u5206\uff0c\u80fd\u5920\u5e6b\u52a9\u4f60\u5275\u5efa\u66f4\u9748\u6d3b\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u78bc\u3002<\/p>\n

\n

\"Swift<\/a><\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

Q1: Swift \u7684 delegate \u6a5f\u5236\u548c\u5176\u4ed6\u8a9e\u8a00\u6709\u4f55\u4e0d\u540c\uff1f<\/h3>\n

A1: Swift \u7684 delegate \u6a5f\u5236\u8207 Objective-C \u76f8\u4f3c\uff0c\u4f46\u8a9e\u6cd5\u66f4\u7c21\u6f54\u4e14\u985e\u578b\u5b89\u5168\uff0c\u80fd\u5920\u907f\u514d\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\u3002<\/p>\n

Q2: \u5982\u4f55\u78ba\u8a8d delegate \u662f\u5426\u6703\u5c0e\u81f4\u5faa\u74b0\u5f15\u7528\uff1f<\/h3>\n

A2: \u4f7f\u7528 weak \u95dc\u9375\u5b57\u4f86\u8072\u660e delegate\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5faa\u74b0\u5f15\u7528\u7684\u554f\u984c\u3002<\/p>\n

Q3: delegate \u548c notification \u6709\u4f55\u5340\u5225\uff1f<\/h3>\n

A3: delegate \u662f\u4e00\u5c0d\u4e00\u7684\u901a\u4fe1\u65b9\u5f0f\uff0c\u901a\u5e38\u7528\u65bc\u7279\u5b9a\u4e8b\u4ef6\u7684\u8fd4\u56de\uff1b\u800c notification \u662f\u4e00\u5c0d\u591a\uff0c\u9069\u5408\u5ee3\u64ad\u8a0a\u606f\u7d66\u591a\u500b\u89c0\u5bdf\u8005\u3002
\n“`
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"

let testView = TestView.init(frame: CGRect.init(x: self.view.frame.origin.x, y: self.view.frame.origin.y, width: UIScreen.main.bounds.width, height:
\nprint(testView.testFunc())<\/p>\n","protected":false},"author":1,"featured_media":559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-380","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-swift","post_format-post-format-aside"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2020\/11\/cup-1-1.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-68","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=380"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/380\/revisions"}],"predecessor-version":[{"id":585,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/380\/revisions\/585"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/559"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}