{"id":163231,"date":"2024-11-04T21:46:23","date_gmt":"2024-11-04T13:46:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163231\/"},"modified":"2024-11-04T21:46:24","modified_gmt":"2024-11-04T13:46:24","slug":"%e8%a7%a3%e6%b1%baios%e7%95%8c%e9%9d%a2%e4%b8%8d%e5%88%b7%e6%96%b0%e5%95%8f%e9%a1%8c%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e8%99%95%e7%90%86%e6%8a%80%e5%b7%a7%e5%88%86%e4%ba%ab%ef%bc%88ios%e7%95%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163231\/","title":{"rendered":"\u89e3\u6c7aiOS\u754c\u9762\u4e0d\u5237\u65b0\u554f\u984c\uff1a\u6578\u64da\u5eab\u8655\u7406\u6280\u5de7\u5206\u4eab\uff08iOS\u754c\u9762\u4e0d\u5237\u65b0\u6578\u64da\u5eab\uff09"},"content":{"rendered":"

\u89e3\u6c7aiOS\u754c\u9762\u4e0d\u5237\u65b0\u554f\u984c\uff1a\u6578\u64da\u5eab\u8655\u7406\u6280\u5de7\u5206\u4eab<\/h1>\n

\u5728\u958b\u767ciOS\u61c9\u7528\u7a0b\u5e8f\u6642\uff0c\u754c\u9762\u4e0d\u5237\u65b0\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u6578\u64da\u5eab\u64cd\u4f5c\u6642\u3002\u7576\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u61c9\u7528\u7a0b\u5e8f\u7684\u754c\u9762\u61c9\u8a72\u80fd\u5920\u5373\u6642\u53cd\u6620\u9019\u4e9b\u8b8a\u5316\u3002\u7136\u800c\uff0c\u8a31\u591a\u958b\u767c\u8005\u5728\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u6642\u6703\u9047\u5230\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u6709\u6548\u7684\u6578\u64da\u5eab\u8655\u7406\u6280\u5de7\uff0c\u4ee5\u89e3\u6c7aiOS\u754c\u9762\u4e0d\u5237\u65b0\u7684\u554f\u984c\u3002<\/p>\n

1. \u7406\u89e3\u6578\u64da\u5eab\u8207\u754c\u9762\u4e4b\u9593\u7684\u95dc\u4fc2<\/h2>\n

\u5728iOS\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5eab\u901a\u5e38\u7528\u65bc\u5b58\u5132\u548c\u7ba1\u7406\u61c9\u7528\u7684\u6578\u64da\u3002\u7576\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u754c\u9762\u80fd\u5920\u53ca\u6642\u66f4\u65b0\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u6578\u64da\u7684\u8b80\u53d6\u3001\u5beb\u5165\u548c\u901a\u77e5\u6a5f\u5236\u3002\u7406\u89e3\u9019\u4e9b\u95dc\u4fc2\u662f\u89e3\u6c7a\u754c\u9762\u4e0d\u5237\u65b0\u7684\u7b2c\u4e00\u6b65\u3002<\/p>\n

2. \u4f7f\u7528\u89c0\u5bdf\u8005\u6a21\u5f0f<\/h2>\n

\u89c0\u5bdf\u8005\u6a21\u5f0f\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u8a2d\u8a08\u6a21\u5f0f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u6578\u64da\u8b8a\u5316\u6642\u81ea\u52d5\u66f4\u65b0\u754c\u9762\u3002\u5728iOS\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528KVO\uff08Key-Value Observing\uff09\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u7576\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u901a\u904eKVO\u901a\u77e5\u754c\u9762\u9032\u884c\u66f4\u65b0\u3002<\/p>\n

class DataModel: NSObject {\n    @objc dynamic var data: String = \"\"\n}\n\nclass ViewController: UIViewController {\n    var model = DataModel()\n\n    override func viewDidLoad() {\n        super.viewDidLoad()\n        model.addObserver(self, forKeyPath: \"data\", options: .new, context: nil)\n    }\n\n    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {\n        if keyPath == \"data\" {\n            \/\/ \u66f4\u65b0\u754c\u9762\n            updateUI()\n        }\n    }\n\n    func updateUI() {\n        \/\/ \u66f4\u65b0\u754c\u9762\u7684\u908f\u8f2f\n    }\n}\n<\/code><\/pre>\n
3. \u4f7f\u7528\u901a\u77e5\u4e2d\u5fc3<\/h2>\n
\u53e6\u4e00\u7a2e\u89e3\u6c7a\u65b9\u6848\u662f\u4f7f\u7528\u901a\u77e5\u4e2d\u5fc3\uff08Notification Center\uff09\u3002\u7576\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u53ef\u4ee5\u767c\u9001\u4e00\u500b\u901a\u77e5\uff0c\u8b93\u6240\u6709\u95dc\u6ce8\u8a72\u901a\u77e5\u7684\u754c\u9762\u9032\u884c\u66f4\u65b0\u3002<\/p>\n
class DataModel {\n    func updateData(newData: String) {\n        \/\/ \u66f4\u65b0\u6578\u64da\u5eab\u908f\u8f2f\n        NotificationCenter.default.post(name: NSNotification.Name(\"DataUpdated\"), object: nil)\n    }\n}\n\nclass ViewController: UIViewController {\n    override func viewDidLoad() {\n        super.viewDidLoad()\n        NotificationCenter.default.addObserver(self, selector: #selector(dataUpdated), name: NSNotification.Name(\"DataUpdated\"), object: nil)\n    }\n\n    @objc func dataUpdated() {\n        \/\/ \u66f4\u65b0\u754c\u9762\n        updateUI()\n    }\n\n    func updateUI() {\n        \/\/ \u66f4\u65b0\u754c\u9762\u7684\u908f\u8f2f\n    }\n}\n<\/code><\/pre>\n
4. \u4f7f\u7528SwiftUI\u7684\u72c0\u614b\u7ba1\u7406<\/h2>\n
\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662fSwiftUI\uff0c\u5247\u53ef\u4ee5\u5229\u7528\u5176\u5167\u5efa\u7684\u72c0\u614b\u7ba1\u7406\u529f\u80fd\u3002SwiftUI\u7684@State\u548c@ObservedObject\u5c6c\u6027\u5305\u88dd\u5668\u53ef\u4ee5\u81ea\u52d5\u76e3\u63a7\u6578\u64da\u7684\u8b8a\u5316\uff0c\u4e26\u5728\u6578\u64da\u8b8a\u5316\u6642\u81ea\u52d5\u5237\u65b0\u754c\u9762\u3002<\/p>\n
class DataModel: ObservableObject {\n    @Published var data: String = \"\"\n}\n\nstruct ContentView: View {\n    @ObservedObject var model = DataModel()\n\n    var body: some View {\n        Text(model.data)\n            .onAppear {\n                \/\/ \u7576\u8996\u5716\u51fa\u73fe\u6642\uff0c\u66f4\u65b0\u6578\u64da\n                model.data = \"\u65b0\u6578\u64da\"\n            }\n    }\n}\n<\/code><\/pre>\n
5. \u78ba\u4fdd\u4e3b\u7dda\u7a0b\u66f4\u65b0\u754c\u9762<\/h2>\n
\u5728iOS\u4e2d\uff0c\u6240\u6709\u7684UI\u66f4\u65b0\u5fc5\u9808\u5728\u4e3b\u7dda\u7a0b\u4e2d\u9032\u884c\u3002\u5982\u679c\u5728\u80cc\u666f\u7dda\u7a0b\u4e2d\u9032\u884cUI\u66f4\u65b0\uff0c\u5c07\u5c0e\u81f4\u754c\u9762\u4e0d\u5237\u65b0\u6216\u5d29\u6f70\u3002\u56e0\u6b64\uff0c\u78ba\u4fdd\u5728\u4e3b\u7dda\u7a0b\u4e2d\u57f7\u884cUI\u66f4\u65b0\u7684\u4ee3\u78bc\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n
DispatchQueue.main.async {\n    \/\/ \u5728\u4e3b\u7dda\u7a0b\u4e2d\u66f4\u65b0\u754c\u9762\n    self.updateUI()\n}\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u89e3\u6c7aiOS\u754c\u9762\u4e0d\u5237\u65b0\u7684\u554f\u984c\u9700\u8981\u958b\u767c\u8005\u7406\u89e3\u6578\u64da\u5eab\u8207\u754c\u9762\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u4e26\u63a1\u7528\u5408\u9069\u7684\u8a2d\u8a08\u6a21\u5f0f\u548c\u6280\u8853\u4f86\u5be6\u73fe\u6578\u64da\u7684\u5373\u6642\u66f4\u65b0\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u89c0\u5bdf\u8005\u6a21\u5f0f\u3001\u901a\u77e5\u4e2d\u5fc3\u9084\u662fSwiftUI\u7684\u72c0\u614b\u7ba1\u7406\uff0c\u6b63\u78ba\u7684\u5be6\u73fe\u90fd\u80fd\u6709\u6548\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5f8c\u7aef\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u89e3\u6c7aiOS\u754c\u9762\u4e0d\u5237\u65b0\u554f\u984c\uff0c\u5206\u4eab\u6578\u64da\u5eab\u8655\u7406\u6280\u5de7\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u5373\u6642\u66f4\u65b0\uff0c\u589e\u5f37\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-163231","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=163231"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163231\/revisions"}],"predecessor-version":[{"id":163232,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163231\/revisions\/163232"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}