{"id":7287,"date":"2022-09-06T22:01:35","date_gmt":"2022-09-06T14:01:35","guid":{"rendered":"http:\/\/123.57.164.21\/?p=7287"},"modified":"2022-09-06T22:01:35","modified_gmt":"2022-09-06T14:01:35","slug":"swift%e5%b0%8f%e7%9f%a5%e8%af%86%e7%82%b9%e4%b9%8bobjc","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=7287","title":{"rendered":"Swift\u5c0f\u77e5\u8bc6\u70b9\u4e4b@objc"},"content":{"rendered":"\n<p><strong>\u4e00 \u6982\u8ff0<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<ul><li>\u80cc\u666f<\/li><\/ul>\n\n\n\n<p>Objective-C \u5bf9\u8c61\u662f\u57fa\u4e8e\u8fd0\u884c\u65f6\u7684\uff0c\u65b9\u6cd5\u6216\u5c5e\u6027\u4f7f\u7528\u52a8\u6001\u6d3e\u53d1 \uff0c\u5728\u8fd0\u884c\u8c03\u7528\u65f6\u518d\u51b3\u5b9a\u5b9e\u9645\u8c03\u7528\u7684\u5177\u4f53\u5b9e\u73b0\u3002\u800c Swift \u4e3a\u4e86\u8ffd\u6c42\u6027\u80fd\uff0c\u5982\u679c\u6ca1\u6709\u7279\u6b8a\u9700\u8981\u7684\u8bdd\uff0c\u662f\u4e0d\u4f1a\u5728\u8fd0\u884c\u65f6\u518d\u6765\u51b3\u5b9a\u8fd9\u4e9b\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cSwift \u7c7b\u578b\u7684\u6210\u5458\u6216\u8005\u65b9\u6cd5\u5728\u7f16\u8bd1\u65f6\u5c31\u5df2\u7ecf\u51b3\u5b9a\uff0c\u800c\u8fd0\u884c\u65f6\u4fbf\u4e0d\u518d\u9700\u8981\u7ecf\u8fc7\u4e00\u6b21\u67e5\u627e\uff0c\u800c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u3002<\/p>\n\n\n\n<p>Objective-C \u4e2d\u6240\u6709\u7c7b\u90fd\u7ee7\u627f\u81eaNSObject\uff0cSwift \u4e2d\u7684\u7c7b\u5982\u679c\u8981\u4f9b Objective-C \u8c03\u7528\uff0c\u5fc5\u987b\u4e5f\u7ee7\u627f\u81eaNSObject\u3002<\/p>\n\n\n\n<ul><li>\u4f5c\u7528<\/li><\/ul>\n\n\n\n<p>@objc\u4fee\u9970\u7b26\u7684\u6839\u672c\u76ee\u7684\u662f\u7528\u6765\u66b4\u9732\u63a5\u53e3\u7ed9 Objective-C \u7684\u8fd0\u884c\u65f6\uff08\u7c7b\u3001\u534f\u8bae\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7b49\uff09<\/p>\n\n\n\n<p>\u6dfb\u52a0@objc\u4fee\u9970\u7b26\u5e76\u4e0d\u610f\u5473\u7740\u8fd9\u4e2a\u65b9\u6cd5\u6216\u8005\u5c5e\u6027\u4f1a\u91c7\u7528 Objective-C \u7684\u65b9\u5f0f\u53d8\u6210\u52a8\u6001\u6d3e\u53d1\uff0cSwift \u4f9d\u7136\u53ef\u80fd\u4f1a\u5c06\u5176\u4f18\u5316\u4e3a\u9759\u6001\u8c03\u7528<\/p>\n\n\n\n<p><strong>\u4e8c @objc<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>1\u3001Swift 3.0<\/strong><\/p>\n\n\n\n<ul><li><strong>a. \u7f16\u8bd1\u5668\u9ed8\u8ba4\u7ed9\u7ee7\u627f\u4e8eNSObject\u7684\u7c7b\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u9690\u5f0f\u6dfb\u52a0@objc\uff1b\u7f3a\u70b9\u662f\u5927\u91cf@objc\u5bfc\u81f4\u4e8c\u8fdb\u5236\u6587\u4ef6\u589e\u5927\uff1b<\/strong><\/li><\/ul>\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=\"\">class MyClass: NSObject {\n\u3000\u3000func print() { } \/\/ \u5305\u542b\u9690\u5f0f\u7684 @objc\n}<\/pre>\n\n\n\n<ul><li><strong>b. Swift\u5728\u67d0\u4e9b\u65b9\u9762\u975e\u5e38\u7684\u968f\u610f\u4eb2\u5207\uff0c\u6bd4\u65b9\u8bf4\u7c7b\u540d\uff0cSwift\u53ef\u4ee5\u4f7f\u7528\u4e2d\u6587\u547d\u540d\uff0c\u4f46OC\u5374\u53ea\u80fd\u4f7f\u7528ASCII\u7801\uff0c\u5728\u4f7f\u7528@objc\u7684\u65f6\u5019\uff0c\u9700\u8981\u6307\u5b9aOC\u4e2d\u6307\u5b9a\u7684ASCII\u7801\u7684\u540d\u79f0\uff0c\u4e3e\u4e2a\u5c0f\u4f8b\u5b50\u5982\u4e0b\u3002<\/strong><\/li><\/ul>\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=\"\">@objc(MyClass)\nclass \u6211\u7684\u7c7b: NSObject {\n@objc(greeting:)\n\u3000\u3000func \u95ee\u5019(\u540d\u5b57: String) {\n\u3000\u3000\u3000\u3000print(\"\u4f60\u597d \\(\u540d\u5b57)\")\n\u3000\u3000}\n}<\/pre>\n\n\n\n<p><strong>2\u3001Swift 4.0<\/strong><\/p>\n\n\n\n<p><strong>a. \u9690\u5f0f\u6dfb\u52a0@objc\u53ea\u5b58\u5728\u4ee5\u4e0b\u573a\u666f\uff1a\u8986\u76d6\u7236\u7c7b\u7684ObjC\u65b9\u6cd5\u3001\u7b26\u5408\u4e00\u4e2aObjC\u7684\u534f\u8bae\uff1b<\/strong><\/p>\n\n\n\n<ul><li>\u8986\u76d6\u7236\u7c7b\u7684ObjC\u65b9\u6cd5<\/li><\/ul>\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=\"\">class Person : NSObject {\n    \/\/\/\u8ba1\u7b97\u5c5e\u6027\n    @objc var name:String {\n        return \"Swift\"\n    }\n\n\/\/\/\u5b58\u50a8\u5c5e\u6027\n    @objc var sex:String = \"\u7537\"\n    \n    \/\/\/\u65b9\u6cd5\n    @objc func greeting(){\n        \n    }\n}\n\nclass Student:Person {\n    override var name:String {\n        return \"\"\n    }\n    \n    \/\/Cannot override with a stored property 'sex'\n    \/\/\u5b50\u7c7b\u4e0d\u80fd\u91cd\u5199\u7236\u7c7b\u7684\u5b58\u50a8\u5c5e\u6027\n    \/\/override var sex: String = \"\u7537\"\n    \n    override func greeting() {\n        \n    }\n}<\/pre>\n\n\n\n<ul><li>\u7b26\u5408\u4e00\u4e2aObjC\u7684\u534f\u8bae<\/li><\/ul>\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=\"\">@objc protocol MyProtocol {\n    func myFun()\n}\n\nclass Person:MyProtocol {\n    func myFun() {\n        \n    }\n}<\/pre>\n\n\n\n<ul><li>\u5f53\u5c5e\u6027\u58f0\u660e\u4e3a@IBAction\u6216\u8005@IBOutlet<\/li><li>\u5f53\u5c5e\u6027\u58f0\u660e\u4e3a@NSManaged<\/li><\/ul>\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=\"\">Core Data \u63d0\u4f9b\u4e86\u57fa\u672c\u5b58\u50a8\u548c\u5b9e\u73b0NSManagedObject\u5b50\u7c7b\u7684\u4e00\u7ec4\u5c5e\u6027\u3002\u5728\u4e0eCore Data \u6a21\u578b\u4e2d\u7ba1\u7406\u5bf9\u8c61\u5b50\u7c7b\u76f8\u5173\u7684\u7279\u6027\u6216\u8005\u5173\u7cfb\u7684\u6bcf\u4e2a\u5c5e\u6027\u5b9a\u4e49\u4e4b\u524d\uff0c\u5c06@NSmanaged\u7279\u6027\u52a0\u5165\u3002\u4e0e Objective-C \u91cc\u9762\u7684 @dynamic\u7279\u6027\u7c7b\u4f3c\uff0c@NSManaged\u7279\u6027\u544a\u77e5 Swift \u7f16\u8bd1\u5668\uff0c\u8fd9\u4e2a\u5c5e\u6027\u7684\u5b58\u50a8\u548c\u5b9e\u73b0\u5c06\u5728\u8fd0\u884c\u65f6\u5b8c\u6210\u3002\u4f46\u662f\uff0c\u4e0e@dynamic\u4e0d\u540c\u7684\u662f\uff0c@NSManaged\u7279\u6027\u4ec5\u5728 Core Data \u652f\u6301\u4e2d\u53ef\u7528\u3002<\/pre>\n\n\n\n<ul><li>@objcMembers \u4fee\u9970\u7684\u7c7b\uff0c\u5b83\u548c\u5b83\u5b50\u7c7b\u7684\u5c5e\u6027\u65b9\u6cd5\u6269\u5c55\u90fd\u4f1a\u9690\u5f0f\u7684\u6dfb\u52a0\u4e0a@objc<\/li><\/ul>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u8981\u7528\u8fd9\u4e2a\u5173\u952e\u5b57\u5462\uff1f<\/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=\"\">@objcMembers \u5728Swift 4\u4e2d\u7ee7\u627f NSObject \u7684 swift class \u4e0d\u518d\u9ed8\u8ba4\u5168\u90e8 bridge \u5230 OC\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8981\u4f7f\u7528\u7684\u8bdd\u6211\u4eec\u5c31\u9700\u8981\u5728class\u524d\u9762\u52a0\u4e0a@objcMembers \u8fd9\u4e48\u4e00\u4e2a\u5173\u952e\u5b57\u3002\n\nswift3\uff1a\u5728 swift 3 \u4e2d\u9664\u4e86\u624b\u52a8\u6dfb\u52a0 @objc \u58f0\u660e\u51fd\u6570\u652f\u6301 OC \u8c03\u7528\u8fd8\u6709\u53e6\u5916\u4e00\u79cd\u65b9\u5f0f\uff1a\u7ee7\u627f NSObject\u3002class \u7ee7\u627f\u4e86 NSObject \u540e\uff0c\u7f16\u8bd1\u5668\u5c31\u4f1a\u9ed8\u8ba4\u7ed9\u8fd9\u4e2a\u7c7b\u4e2d\u7684\u6240\u6709\u51fd\u6570\u90fd\u6807\u8bb0\u4e3a @objc \uff0c\u652f\u6301 OC \u8c03\u7528\u3002\nswift4\uff1a\u82f9\u679c\u5728Swift 4 \u4e2d\u82f9\u679c\u4fee\u6539\u4e86\u81ea\u52a8\u6dfb\u52a0 @objc \u7684\u903b\u8f91\uff1a \u4e00\u4e2a\u7ee7\u627f NSObject \u7684 swift \u7c7b\u4e0d\u518d\u9ed8\u8ba4\u7ed9\u6240\u6709\u51fd\u6570\u6dfb\u52a0 @objc\u3002\u53ea\u5728\u5b9e\u73b0 OC \u63a5\u53e3\u548c\u91cd\u5199 OC \u65b9\u6cd5\u65f6\u624d\u81ea\u52a8\u7ed9\u51fd\u6570\u6dfb\u52a0 @objc \u6807\u8bc6\u3002Swift4 \u540e\u7ee7\u627f\u81eaNSObject\u7684\u7c7b\u4e0d\u518d\u9690\u5f0f\u6dfb\u52a0@objc\u5173\u952e\u5b57\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u975e\u5e38\u4f9d\u8d56 Objective-C \u7684\u8fd0\u884c\u65f6\uff08\u5982 XCTest\uff09\uff0c\u6240\u4ee5\u5728 Swift4 \u4e2d\u63d0\u4f9b\u4e86@objcMembers\u5173\u952e\u5b57\uff0c\u5bf9\u7c7b\u548c\u5b50\u7c7b\u3001\u6269\u5c55\u548c\u5b50\u7c7b\u6269\u5c55\u91cd\u65b0\u542f\u7528@objc\u63a8\u65ad\u3002<\/pre>\n\n\n\n<ul><li>\u5b9e\u4f8b<\/li><\/ul>\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=\"\">@objcMembers\nclass MyClass : NSObject {\n  func foo() { }             \/\/ implicitly @objc\n    \n  func bar() -> (Int, Int){  \/\/ not @objc, because tuple returns\u3002aren't representable in Objective-C\n        return (1,1)\n  }\n}\n \nextension MyClass {\n  func baz() { }      \/\/ implicitly @objc\n}\n \nclass MySubClass : MyClass {\n  func wibble() { }   \/\/ implicitly @objc\n}\n \nextension MySubClass {\n  func wobble() { }   \/\/ implicitly @objc\n}<\/pre>\n\n\n\n<ul><li>\u82e5\u6269\u5c55\u540d\u524d\u52a0@objc\uff0c\u5219\u8be5\u6269\u5c55\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u9690\u5f0f\u6dfb\u52a0@objc<\/li><\/ul>\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=\"\">class MyClass { }\n@objc extension MyClass {\n    func a() { } \/\/ \u5305\u542b\u9690\u5f0f\u7684 @objc\n}<\/pre>\n\n\n\n<p><strong>b. \u663e\u5f0f\u7ed9\u65b9\u6cd5\u6dfb\u52a0@objc\uff1b<\/strong><\/p>\n\n\n\n<ul><li><code>Selector<\/code> \u4e2d\u8c03\u7528\u7684\u65b9\u6cd5\u9700\u8981\u5728\u65b9\u6cd5\u524d\u58f0\u660e <code>@objc<\/code>\uff0c\u76ee\u7684\u662f\u5141\u8bb8\u8fd9\u4e2a\u51fd\u6570\u5728\u201c\u8fd0\u884c\u65f6\u201d\u901a\u8fc7 Objective-C \u7684\u6d88\u606f\u673a\u5236\u8c03\u7528<\/li><\/ul>\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=\"\">verride func viewDidLoad() {\n    super.viewDidLoad()\n    let btn = UIButton(type: .contactAdd)     \n    btn.addTarget(self, action: #selector(click), for: .touchUpInside)\n}\n@objc func click()  {      \n    print(\"Button clicked\")\n}<\/pre>\n\n\n\n<ul><li>\u534f\u8bae\u7684\u65b9\u6cd5\u53ef\u9009\u65f6\uff0c\u534f\u8bae\u548c\u53ef\u9009\u65b9\u6cd5\u524d\u8981\u7528 <code>@objc<\/code>\u58f0\u660e<\/li><\/ul>\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=\"\">@objc protocol OptionalProtocol {\n    @objc optional func optionalMethold1()\n    @objc optional func optionalMethold2()\n}<\/pre>\n\n\n\n<ul><li>\u7528weak\u4fee\u9970\u534f\u8bae\u65f6\uff0c\u534f\u8bae\u524d\u9762\u8981\u7528<code>@objc<\/code>\u58f0\u660e<\/li><\/ul>\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=\"\">@objc protocol MyDelegate{   \n    func methold1()  \n}\n\nclass MyClass{\n    weak var delegate: MyDelegate?  \n}<\/pre>\n\n\n\n<p><strong>c \u82e5\u6269\u5c55\u540d\u524d\u52a0@noobjc\uff0c\u5219\u8be5\u6269\u5c55\u7684\u6240\u6709\u65b9\u6cd5\u90fd\u4e0d\u4f1a\u9690\u5f0f\u6dfb\u52a0@objc\uff08\u6392\u9664\u7c7b\u540d\u524d\u52a0@objcMembers\u7684\u5f71\u54cd\uff09\uff1b<\/strong><\/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=\"\">@objcMembers class MyClass : NSObject {\n\u3000\u3000 func print() { } \/\/ \u5305\u542b\u9690\u5f0f\u7684 @objc\n}\n@nonobjc extension MyClass {\n\u3000\u3000 func a() { } \/\/ \u4e0d\u4f1a\u5305\u542b\u9690\u5f0f\u7684 @objc\n}<\/pre>\n\n\n\n<p><strong>d.\u8bbe\u7f6eXcode\u7684Build Settings\u4e2d\u7684Swift 3 @objc Inference\uff0c\u51b3\u5b9a\u662f\u5426\u7ee7\u7eed\u91c7\u7528Swift 3.0\u9690\u5f0f\u6dfb\u52a0@objc\u7684\u6a21\u5f0f\uff1b<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00 \u6982\u8ff0 \u80cc\u666f Objective-C \u5bf9\u8c61\u662f\u57fa\u4e8e\u8fd0\u884c\u65f6\u7684\uff0c\u65b9\u6cd5\u6216\u5c5e\u6027\u4f7f\u7528\u52a8\u6001\u6d3e\u53d1 \uff0c\u5728\u8fd0\u884c\u8c03\u7528\u65f6\u518d\u51b3\u5b9a\u5b9e\u9645\u8c03 [&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\/7287"}],"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=7287"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/7287\/revisions"}],"predecessor-version":[{"id":7288,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/7287\/revisions\/7288"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}