{"id":48095,"date":"2023-11-07T17:37:53","date_gmt":"2023-04-25T02:58:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8%e3%80%90%e8%b6%85%e5%be%ae%e5%9e%8b%e3%80%91%e7%9a%84aws-appsync-amplify%e6%9d%a5%e5%88%9b%e5%bb%baios%e8%81%8a%e5%a4%a9%e5%ba%94%e7%94%a8\/"},"modified":"2024-05-04T07:59:13","modified_gmt":"2024-05-03T23:59:13","slug":"%e4%bd%bf%e7%94%a8%e3%80%90%e8%b6%85%e5%be%ae%e5%9e%8b%e3%80%91%e7%9a%84aws-appsync-amplify%e6%9d%a5%e5%88%9b%e5%bb%baios%e8%81%8a%e5%a4%a9%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8%e3%80%90%e8%b6%85%e5%be%ae%e5%9e%8b%e3%80%91%e7%9a%84aws-appsync-amplify%e6%9d%a5%e5%88%9b%e5%bb%baios%e8%81%8a%e5%a4%a9%e5%ba%94%e7%94%a8\/","title":{"rendered":"\u4f7f\u7528\u3010\u8d85\u5fae\u578b\u3011\u7684AWS AppSync + Amplify\u6765\u521b\u5efaiOS\u804a\u5929\u5e94\u7528"},"content":{"rendered":"

\u9996\u5148<\/h2>\n

\u8fd9\u7bc7\u6587\u7ae0\u662fand factory Advent Calendar 2020 \u7684\u7b2c\u56db\u7bc7\u6587\u7ae0\u3002\u6628\u5929\u662f@ykkd\u5148\u751f\u7684Swiftlint\u81ea\u52a8\u4fee\u6b63\u4ee3\u7801\uff01?<\/p>\n

\u4e9a\u9a6c\u900a\u4e91\u670d\u52a1 AppSync \/ Amplify<\/h2>\n

\u6211\u8ba4\u4e3a\u5728\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u7684\u540e\u7aef\u4e2d\uff0c\u4f7f\u7528Firebase\u4f5c\u4e3a\u804a\u5929\u5e94\u7528\u7a0b\u5e8f\u7684\u540e\u7aef\u5f88\u5e38\u89c1\uff0c\u4f46AWS\u7684\u6258\u7ba1\u670d\u52a1\u6709\u4e00\u4e2a\u91cd\u5927\u4f18\u70b9\uff0c\u5c31\u662f\u4e0e\u5176\u4ed6AWS\u670d\u52a1\u7684\u96c6\u6210\u5f88\u5bb9\u6613\u3002
\n\u867d\u7136\u6211\u81ea\u5df1\u662fiOS\u5de5\u7a0b\u5e08\uff0c\u4f46\u6211\u5bf9AWS\u63d0\u4f9b\u7684\u670d\u52a1\u548c\u6784\u5efa\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u6211\u51b3\u5b9a\u8fd9\u6b21\u5c1d\u8bd5\u4f7f\u7528AppSync\u548cAmplify\u3002<\/p>\n

AppSync\u662f\u4e9a\u9a6c\u900a\u63d0\u4f9b\u7684\u4e00\u9879\u6258\u7ba1\u670d\u52a1\uff0c\u65e8\u5728\u652f\u6301\u4f7f\u7528GraphQL\u8fdb\u884c\u670d\u52a1\u5f00\u53d1\u3002\u901a\u8fc7\u4f7f\u7528GraphQL\u4e2d\u63d0\u4f9b\u7684\u8ba2\u9605\u529f\u80fd\uff0c\u53ef\u4ee5\u76f8\u5bf9\u8f7b\u677e\u5730\u521b\u5efa\u804a\u5929\u529f\u80fd\u3002
\n\u6b64\u5916\uff0cAmplify\u662f\u4e3a\u5ba2\u6237\u7aef\u8bbf\u95eeAppSync\u800c\u63d0\u4f9b\u7684\u5de5\u5177\u3002\u901a\u8fc7\u5728iOS\u4e2d\u4f7f\u7528Amplify SDK\uff0cSDK\u5c06\u8d1f\u8d23\u5904\u7406\u4e0eAppSync\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u9012\u3002<\/p>\n

\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n

\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528AWS AppSync + Amplify\u6765\u5feb\u901f\u521b\u5efa\u4e00\u4e2a\u8d85\u7ea7\u7b80\u7ea6\u7684\u804a\u5929\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u653e\u5927\u5668\u7684\u8bbe\u7f6e<\/h1>\n

\u524d\u63d0\u6761\u4ef6 t\u00ed<\/h2>\n
    \n
  • \n
      AWS\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u6301\u3063\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n

       <\/p>\n

        \n
      • \n
          Amplify\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u304c\u5b8c\u4e86\u3057\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n

          Amplify\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3001Pod\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u884c\u3044\u307e\u3059\u3002
          \n\u8a73\u7d30\u306f\u3053\u3061\u3089\u3092\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n

          \u5728Amplify\u7684\u547d\u4ee4\u884c\u5de5\u5177\u4e2d\uff0c\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/p>\n

          Amplify\u7684\u521d\u59cb\u5316<\/h2>\n
          amplify init\r\n<\/code><\/pre>\n
          \u4e4b\u540e\u4f1a\u88ab\u8be2\u95ee\u9879\u76ee\u540d\u79f0\u7b49\u521d\u59cb\u8bbe\u7f6e\uff0c\u6211\u4f1a\u8fdb\u884c\u56de\u7b54\u3002\u8fd9\u6b21\u6211\u56de\u7b54\u5982\u4e0b\u3002<\/p>\n
          ? Enter a name for the project \r\n    -> SampleChatApp\r\n? Enter a name for the environment\r\n    -> dev\r\n? Choose your default editor:\r\n    -> Visual Studio Code\r\n? Choose the type of app that you're building\r\n    -> ios\r\n? Do you want to use an AWS profile?\r\n    -> Yes\r\n? Please choose the profile you want to use\r\n    -> default\r\n<\/code><\/pre>\n
          \u2705 \u653e\u5927\u8bbe\u7f6e\u6210\u529f\u5b8c\u6210\u3002<\/p>\n
          API\u7684\u8bbe\u7f6e<\/h2>\n
          \u5f53\u4f60\u5b8c\u6210amplify\u7684\u8bbe\u7f6e\u540e\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u547d\u4ee4\u884c\u5de5\u5177\u6765\u8bbe\u7f6eAPI\u3002<\/p>\n
          \u5728\u9879\u76ee\u6839\u76ee\u5f55\u4e0b\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u5e76\u6839\u636e\u786e\u8ba4\u5185\u5bb9\u9010\u6b65\u56de\u7b54\u3002<\/p>\n
          amplify add api\r\n<\/code><\/pre>\n
          \u518d\u6b21\u88ab\u554f\u5230\u3002\u63a5\u4e0b\u4f86\u662f\u6709\u95dcAPI\u7684\u521d\u8a2d\u5b9a\u3002\u9019\u6b21\u6848\u4f8b\u7684\u7b54\u6848\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
          ? Please select from one of the below mentioned services: \r\n    -> GraphQL\r\n? Provide API name:\r\n    -> samplechatapp\r\n? Choose the default authorization type for the API\r\n    -> API key\r\n? Enter a description for the API key:\r\n    -> SampleChatApp's API key.\r\n? After how many days from now the API key should expire (1-365):\r\n    -> 7\r\n? Do you want to configure advanced settings for the GraphQL API\r\n    -> No, I am done.\r\n? Do you have an annotated GraphQL schema?\r\n    -> No\r\n? Choose a schema template:\r\n    -> Single object with fields (e.g., \u201cTodo\u201d with ID, name, description)\r\n\r\n\r\nGraphQL schema compiled successfully.\r\n\r\n? Do you want to edit the schema now?\r\n    -> Yes \/\/ Yes\u3068\u3059\u308b\u3068\u30a8\u30c7\u30a3\u30bf\u304c\u958b\u304d\u3001\u30b9\u30ad\u30fc\u30de\u3092\u7de8\u96c6\u3067\u304d\u308b\r\n\r\n<\/code><\/pre>\n
          \u6a21\u578b\u5b9a\u4e49<\/h2>\n
          \u5f53\u56de\u7b54\u6700\u540e\u4e00\u4e2a\u5173\u4e8e\u521b\u5efaAPI\u7684\u95ee\u9898\u56de\u7b54\u4e3a\u662f\u540e\uff0c\u7f16\u8f91\u5668\u5c06\u6253\u5f00\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u7f16\u8f91\u6a21\u5f0f\u3002
          \n\u901a\u8fc7GraphQL\uff0c\u6211\u4eec\u6839\u636egraphql\u6587\u4ef6\u4e2d\u5b9a\u4e49\u7684\u6a21\u5f0f\u6765\u521b\u5efaAPI\u3002
          \n\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u7b80\u5355\u5730\u5b9a\u4e49\u4e86\u4ee5\u4e0b\u6d88\u606f\u6a21\u578b\uff1a
          \n\u5b83\u5177\u6709\u6587\u672c\u3001\u521b\u5efa\u65e5\u671f\uff08\u4ee5\u6beb\u79d2\u7ea7\u7684\u7eaa\u5143\u65f6\u95f4\u4e3a\u57fa\u7840\uff09\u548c\u6700\u5c0f\u9650\u5ea6\u7684UserID\u5c5e\u6027\u3002<\/p>\n
          type<\/span> Message<\/span> @<\/span>model<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  text<\/span>:<\/span> String<\/span>!<\/span>\r\n  createdAt<\/span>:<\/span> String<\/span>!<\/span>\r\n  user<\/span>:<\/span> String<\/span>!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
          \u5b9a\u4e49\u5b8c\u6a21\u5f0f\u4e4b\u540e\uff0c\u5c06\u4e4b\u524d\u521b\u5efa\u7684\u6a21\u5f0f\u4ee5\u53caAPI\u7684\u5b9a\u4e49\u6587\u4ef6\u7b49\u672c\u5730\u8d44\u6e90\u63a8\u9001\u5230\u8fdc\u7a0b\u3002<\/p>\n
          amplify push\r\n<\/code><\/pre>\n
          \u4e00\u65e6\u6210\u529f\u63a8\u9001\u540e\uff0c\u901a\u5e38\u4f1a\u6709\u95ee\u9898\u88ab\u63d0\u51fa\u3002
          \n\u57fa\u4e8e\u8fd9\u4e2a\u56de\u7b54\uff0c\u5c06\u51b3\u5b9a\u7528\u4e8e\u8bbf\u95ee\u57fa\u4e8e\u8be5API\u521b\u5efa\u7684\u5c01\u88c5\u5904\u7406\u7684\u7c7b\u578b\u548c\u547d\u540d\u3002<\/p>\n
          ? Do you want to generate code for your newly created GraphQL API\r\n    -> Yes\r\n? Enter the file name pattern of graphql queries, mutations and subscriptions\r\n    -> graphql\/**\/*.graphql\r\n? Do you want to generate\/update all possible GraphQL operations - queries, mutations and subscripti\r\nons\r\n    -> Yes\r\n? Enter maximum statement depth [increase from default if your schema is deeply nested]\r\n    -> 2\r\n? Enter the file name for the generated code\r\n    -> API.swift\r\n<\/code><\/pre>\n
          \u6267\u884c\u5230\u8fd9\u4e00\u6b65\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Amplify\u7684\u547d\u4ee4\u884c\u5de5\u5177\u521b\u5efaAPI\uff0c
          \n\u7136\u540e\u60a8\u53ef\u4ee5\u5728AWS\u63a7\u5236\u53f0->\u670d\u52a1->AppSync\u4e2d\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n
          \"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
          \u5ba2\u6237\u7aef\u5b9e\u65bd<\/h1>\n
          \u5b89\u88c5<\/h2>\n
          \u5c06\u5728amplify init\u65f6\u521b\u5efa\u7684\u4e24\u4e2ajson\u6587\u4ef6\uff0c\u5373amplifyconfiguration.json\u548cawsconfiguration.json\uff0c\u8f6c\u79fb\u5230Xcode\u9879\u76ee\u4e2d\u3002<\/p>\n
          \u6b64\u5916\uff0c\u5728\u5e94\u7528\u542f\u52a8\u65f6\uff0c\u4f5c\u4e3aAmplify\u7684\u8bbe\u7f6e\u8fc7\u7a0b\uff0cAppDelegate\u5c06\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/p>\n
          import<\/span> UIKit<\/span>\r\nimport<\/span> Amplify<\/span>\r\nimport<\/span> AmplifyPlugins<\/span>\r\n\r\n@UIApplicationMain<\/span>\r\nclass<\/span> AppDelegate<\/span>:<\/span> UIResponder<\/span>,<\/span> UIApplicationDelegate<\/span> {<\/span>\r\n\r\n    var<\/span> window<\/span>:<\/span> UIWindow<\/span>?<\/span>\r\n    func<\/span> application<\/span>(<\/span>_<\/span> application<\/span>:<\/span> UIApplication<\/span>,<\/span> didFinishLaunchingWithOptions<\/span> launchOptions<\/span>:<\/span> [<\/span>UIApplication<\/span>.<\/span>LaunchOptionsKey<\/span>:<\/span> Any<\/span>]?)<\/span> -><\/span> Bool<\/span> {<\/span>\r\n\r\n        \/\/ Setup Amplify<\/span>\r\n        do<\/span> {<\/span>\r\n            try<\/span> Amplify<\/span>.<\/span>add<\/span>(<\/span>plugin<\/span>:<\/span> AWSAPIPlugin<\/span>(<\/span>modelRegistration<\/span>:<\/span> AmplifyModels<\/span>()))<\/span>\r\n            try<\/span> Amplify<\/span>.<\/span>configure<\/span>()<\/span>\r\n        }<\/span> catch<\/span> {<\/span>\r\n            print<\/span>(<\/span>\"An error occurred setting up Amplify: <\/span>\\(<\/span>error<\/span>)<\/span>\"<\/span>)<\/span>\r\n        }<\/span>\r\n\r\n        \/\/ \u7565<\/span>\r\n\r\n        return<\/span> true<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
          \u5b9e\u65bd\u804a\u5929\u529f\u80fd<\/h2>\n
          \u8fd9\u662f\u804a\u5929\u529f\u80fd\u7684\u5b9e\u65bd\u3002<\/p>\n
          \u5728viewDidLoad\u4e2d\u83b7\u53d6\u4fdd\u5b58\u5728\u6570\u636e\u6e90\u4e2d\u7684\u6d88\u606f<\/h3>\n
          \u4f7f\u7528GraphQL\u7684REST API\u7684Get\u8bf7\u6c42\u7531query\u8d1f\u8d23\u3002\u5229\u7528Amplify SDK\uff0c\u6211\u4eec\u53ef\u4ee5\u6267\u884cAmplify.API.query(request:)\u6765\u83b7\u53d6Message\u7684\u6570\u7ec4\u3002\u6b64\u5916\uff0c\u901a\u8fc7\u7ed3\u5408\u6307\u5b9alimit\u548c\u5305\u542b\u4e0b\u4e00\u4e2a\u503c\u7684nextToken\uff0c\u8fd8\u53ef\u4ee5\u6267\u884c\u5206\u9875\u64cd\u4f5c\u3002<\/p>\n
          \r\n    @IBOutlet<\/span> private<\/span> weak<\/span> var<\/span> tableView<\/span>:<\/span> UITableView<\/span>!<\/span>\r\n\r\n    var<\/span> messages<\/span>:<\/span> [<\/span>Message<\/span>]<\/span> =<\/span> []<\/span>\r\n\r\n    override<\/span> func<\/span> viewDidLoad<\/span>()<\/span> {<\/span>\r\n        super<\/span>.<\/span>viewDidLoad<\/span>()<\/span>\r\n        self<\/span>.<\/span>fetchMessage<\/span>()<\/span>\r\n    }<\/span>\r\n\r\n    func<\/span> fetchMessage<\/span>()<\/span> {<\/span>\r\n        \/\/ Amplify SDK\u7d4c\u7531\u3067query\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057Message\u306e\u914d\u5217\u3092\u53d6\u5f97<\/span>\r\n        Amplify<\/span>.<\/span>API<\/span>.<\/span>query<\/span>(<\/span>request<\/span>:<\/span> .<\/span>list<\/span>(<\/span>Message<\/span>.<\/span>self<\/span>,<\/span> where<\/span>:<\/span> nil<\/span>))<\/span> {<\/span> event<\/span> in<\/span>\r\n            switch<\/span> event<\/span> {<\/span>\r\n            case<\/span> .<\/span>success<\/span>(<\/span>let<\/span> result<\/span>):<\/span>\r\n                \/\/ GraphQL\u306e\u5834\u5408\u3001Query\u5931\u6557\u6642\u306eerror\u3082\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u542b\u307e\u308c\u308b<\/span>\r\n                switch<\/span> result<\/span> {<\/span>\r\n                case<\/span> .<\/span>success<\/span>(<\/span>let<\/span> messages<\/span>):<\/span>\r\n                    self<\/span>.<\/span>messages<\/span> =<\/span> messages<\/span>\r\n                    DispatchQueue<\/span>.<\/span>main<\/span>.<\/span>async<\/span> {<\/span>\r\n                        \/\/ tableView\u3092\u66f4\u65b0<\/span>\r\n                        self<\/span>.<\/span>tableView<\/span>.<\/span>reloadData<\/span>()<\/span>\r\n                    }<\/span>\r\n                case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> error<\/span>):<\/span>\r\n                    \/\/ \u30b5\u30fc\u30d0\u30fc\u304b\u3089\u8fd4\u3055\u308c\u308b\u30a8\u30e9\u30fc\u306f\u3053\u3063\u3061<\/span>\r\n                }<\/span>\r\n            case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> error<\/span>):<\/span>\r\n                \/\/ \u901a\u4fe1\u30a8\u30e9\u30fc\u7b49\u306e\u5834\u5408\u306f\u3053\u3063\u3061<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
          \u901a\u8fc7\u70b9\u51fb\u53d1\u9001\u6309\u94ae\u6765\u63d0\u4ea4\u6570\u636e\u3002<\/h3>\n
          \u5728GraphQL\u4e2d\uff0c\u521b\u5efa\u3001\u4fee\u6539\u7b49\u6570\u636e\u5199\u5165\u64cd\u4f5c\u7531mutate\u6267\u884c\u3002<\/p>\n
          \r\n    @IBAction<\/span> func<\/span> tappedSendButton<\/span>()<\/span> {<\/span>\r\n        \/\/ \u30ad\u30fc\u30dc\u30fc\u30c9\u9589\u3058\u308b<\/span>\r\n        self<\/span>.<\/span>textField<\/span>.<\/span>resignFirstResponder<\/span>()<\/span>\r\n\r\n        \/\/ \u30e1\u30c3\u30bb\u30fc\u30b8\u5185\u5bb9<\/span>\r\n        guard<\/span> let<\/span> text<\/span> =<\/span> self<\/span>.<\/span>textField<\/span>.<\/span>text<\/span>,<\/span> !<\/span>text<\/span>.<\/span>isEmpty<\/span> else<\/span> {<\/span>\r\n            return<\/span>\r\n        }<\/span>\r\n        \/\/ \u9001\u4fe1\u6642\u9593\u3092\u53d6\u5f97<\/span>\r\n        let<\/span> createdAt<\/span> =<\/span> String<\/span>(<\/span>Date<\/span>()<\/span>.<\/span>timeIntervalSince1970<\/span>)<\/span>\r\n        \/\/ \u5225\u7ba1\u7406\u3057\u3066\u3044\u308bUserID<\/span>\r\n        let<\/span> user<\/span> =<\/span> UserIdRepositoryProvider<\/span>.<\/span>provide<\/span>()<\/span>.<\/span>getUserId<\/span>()<\/span>\r\n        let<\/span> message<\/span> =<\/span> Message<\/span>(<\/span>text<\/span>:<\/span> text<\/span>,<\/span> ts<\/span>:<\/span> ts<\/span>,<\/span> user<\/span>:<\/span> user<\/span>!<\/span>)<\/span>\r\n\r\n        \/\/ mutate\u3067\u65b0\u898f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4f5c\u6210<\/span>\r\n        Amplify<\/span>.<\/span>API<\/span>.<\/span>mutate<\/span>(<\/span>request<\/span>:<\/span> .<\/span>create<\/span>(<\/span>message<\/span>))<\/span> {<\/span> event<\/span> in<\/span>\r\n            switch<\/span> event<\/span> {<\/span>\r\n            case<\/span> .<\/span>success<\/span>(<\/span>let<\/span> result<\/span>):<\/span>\r\n                switch<\/span> result<\/span> {<\/span>\r\n                case<\/span> .<\/span>success<\/span>(<\/span>let<\/span> message<\/span>):<\/span>\r\n                    print<\/span>(<\/span>\"Successfully created the message: <\/span>\\(<\/span>message<\/span>)<\/span>\"<\/span>)<\/span>\r\n                case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> graphQLError<\/span>):<\/span>\r\n                    \/\/ \u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306f\u3053\u3063\u3061<\/span>\r\n                    print<\/span>(<\/span>\"Failed to create graphql <\/span>\\(<\/span>graphQLError<\/span>)<\/span>\"<\/span>)<\/span>\r\n                }<\/span>\r\n            case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> apiError<\/span>):<\/span>\r\n                \/\/ \u901a\u4fe1\u307e\u308f\u308a\u306a\u3069\u306eError\u306b\u306a\u3063\u305f\u5834\u5408\u306f\u3053\u3063\u3061<\/span>\r\n                print<\/span>(<\/span>\"Failed to create a message\"<\/span>,<\/span> apiError<\/span>)<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n\r\n        \/\/ \u521d\u671f\u5316\u3057\u3066\u304a\u304f<\/span>\r\n        self<\/span>.<\/span>textField<\/span>.<\/span>text<\/span> =<\/span> \"\"<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
          \u8ba2\u9605\u6570\u636e\u6e90<\/h3>\n
          \u6700\u540e\uff0c\u6211\u4eec\u5c06\u5b9e\u73b0\u5b9e\u65f6\u7ed3\u679c\u7684\u53cd\u6620\u3002
          \n\u901a\u8fc7\u4f7f\u7528GraphQL\u7684\u8ba2\u9605\u529f\u80fd\uff0c\u53ef\u4ee5\u5b9e\u73b0\u53cc\u5411\u7684\u5957\u63a5\u5b57\u901a\u4fe1\u3002
          \n\u5728Amplify\u4e2d\uff0c\u901a\u8fc7\u6267\u884cAmplify.API.subscribe()\uff0c\u53ef\u4ee5\u4f7f\u6570\u636e\u6e90\u7684\u66f4\u6539\u80fd\u591f\u54cd\u5e94\u5f0f\u5730\u53cd\u6620\u51fa\u6765\u3002<\/p>\n
          \r\n    override<\/span> func<\/span> viewDidLoad<\/span>()<\/span> {<\/span>\r\n        super<\/span>.<\/span>viewDidLoad<\/span>()<\/span>\r\n        self<\/span>.<\/span>fetchMessage<\/span>()<\/span>\r\n        self<\/span>.<\/span>subscribeMessage<\/span>()<\/span>\r\n    }<\/span>\r\n\r\n    func<\/span> subscribeMessage<\/span>()<\/span> {<\/span>\r\n        \/\/ \u65b0\u305f\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u4f5c\u6210\u3092\u8cfc\u8aad\u3059\u308b<\/span>\r\n        subscription<\/span> =<\/span> Amplify<\/span>.<\/span>API<\/span>.<\/span>subscribe<\/span>(<\/span>request<\/span>:<\/span> .<\/span>subscription<\/span>(<\/span>of<\/span>:<\/span> Message<\/span>.<\/span>self<\/span>,<\/span> type<\/span>:<\/span> .<\/span>onCreate<\/span>),<\/span> valueListener<\/span>:<\/span> {<\/span> (<\/span>subscriptionEvent<\/span>)<\/span> in<\/span>\r\n            \/\/ \u8cfc\u8aad\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u5185\u5bb9\u3092\u30c1\u30a7\u30c3\u30af<\/span>\r\n            switch<\/span> subscriptionEvent<\/span> {<\/span>\r\n\r\n            \/\/ \u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u306e\u63a5\u7d9a\u72b6\u614b\u306e\u5909\u66f4\u3092\u691c\u77e5<\/span>\r\n            case<\/span> .<\/span>connection<\/span>(<\/span>let<\/span> subscriptionConnectionState<\/span>):<\/span>\r\n                print<\/span>(<\/span>\"Subscription connect state is <\/span>\\(<\/span>subscriptionConnectionState<\/span>)<\/span>\"<\/span>)<\/span>\r\n\r\n            \/\/ \u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3092\u691c\u77e5<\/span>\r\n            case<\/span> .<\/span>data<\/span>(<\/span>let<\/span> result<\/span>):<\/span>\r\n                switch<\/span> result<\/span> {<\/span>\r\n                case<\/span> .<\/span>success<\/span>(<\/span>let<\/span> createdMessage<\/span>):<\/span>\r\n                    self<\/span>.<\/span>messages<\/span>.<\/span>append<\/span>(<\/span>createdMessage<\/span>)<\/span>\r\n                    DispatchQueue<\/span>.<\/span>main<\/span>.<\/span>async<\/span> {<\/span>\r\n                        \/\/ \u30c6\u30fc\u30d6\u30eb\u66f4\u65b0<\/span>\r\n                        self<\/span>.<\/span>tableView<\/span>.<\/span>reloadData<\/span>()<\/span>\r\n\r\n                        \/\/ \u6700\u65b0\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u307e\u3067\u30b9\u30af\u30ed\u30fc\u30eb<\/span>\r\n                        let<\/span> indexPath<\/span> =<\/span> IndexPath<\/span>(<\/span>row<\/span>:<\/span> self<\/span>.<\/span>messages<\/span>.<\/span>count<\/span> -<\/span> 1<\/span>,<\/span> section<\/span>:<\/span> 0<\/span>)<\/span>\r\n                        self<\/span>.<\/span>tableView<\/span>.<\/span>scrollToRow<\/span>(<\/span>at<\/span>:<\/span> indexPath<\/span>,<\/span> at<\/span>:<\/span> .<\/span>bottom<\/span>,<\/span> animated<\/span>:<\/span> true<\/span>)<\/span>\r\n                    }<\/span>\r\n                case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> error<\/span>):<\/span>\r\n                    print<\/span>(<\/span>\"Got failed result with <\/span>\\(<\/span>error<\/span>.<\/span>errorDescription<\/span>)<\/span>\"<\/span>)<\/span>\r\n                }<\/span>\r\n            }<\/span>\r\n        })<\/span> {<\/span> result<\/span> in<\/span>\r\n            switch<\/span> result<\/span> {<\/span>\r\n            case<\/span> .<\/span>success<\/span>:<\/span>\r\n                print<\/span>(<\/span>\"Subscription has been closed successfully\"<\/span>)<\/span>\r\n            case<\/span> .<\/span>failure<\/span>(<\/span>let<\/span> apiError<\/span>):<\/span>\r\n                print<\/span>(<\/span>\"Subscription has terminated with <\/span>\\(<\/span>apiError<\/span>)<\/span>\"<\/span>)<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
          \u6682\u65f6\u5b8c\u6210<\/h2>\n
          \u597d\u50cf\u505a\u5f97\u5f88\u4e0d\u9519\u554a~<\/p>\n
          \"undefined\"<\/div>\n
          \u505a\u4e0d\u5b8c\u7684\u4e8b\u60c5<\/h2>\n
          \u867d\u7136\u7ed9\u4eba\u7684\u611f\u89c9\u4f3c\u4e4e\u6709\u4e00\u4e9b\u8fdb\u5c55\uff0c\u4f46\u5b9e\u9645\u4e0a\u8fd9\u6b21\u6392\u5e8f\u5e76\u672a\u6210\u529f\u3002
          \n\uff08\u901a\u8fc7\u8ba2\u9605\u53ef\u4ee5\u6309\u65f6\u95f4\u987a\u5e8f\u83b7\u53d6\u5185\u5bb9\uff0c\u6240\u4ee5\u53ef\u4ee5\u5e94\u4ed8\uff0c\u4f46\u901a\u8fc7\u67e5\u8be2\u83b7\u53d6\u7684\u5185\u5bb9\u4f1a\u6309\u7167Key\u4e2d\u7684Message ID\u6392\u5e8f\uff0c\u5bfc\u81f4\u987a\u5e8f\u6df7\u4e71\uff09<\/p>\n
          \"Simulator<\/div>\n
          \u5982\u679c\u662f\u5728\u804a\u5929\u4e2d\uff0c\u81ea\u7136\u5e0c\u671b\u6309\u7167\u65f6\u95f4\u987a\u5e8f\u6392\u5217\uff0c\u4f46\u7531\u4e8e\u8d85\u7b80\u7ea6\u7684\u539f\u56e0\uff0c\u8bf7\u8c05\u89e3\u3002
          \n\uff08\u867d\u7136\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539schema.graphql\u5e76\u5c06createdAt\u6307\u5b9a\u4e3a\u6392\u5e8f\u952e\uff0c\u4f46\u5bf9\u4e8e\u901a\u8fc7Amplify SDK\u95f4\u63a5\u8c03\u7528\u8be5\u8bed\u53e5\uff0c\u6211\u4e0d\u6e05\u695a\u5e94\u8be5\u5982\u4f55\u8c03\u7528\u5b83\u3002\u5982\u679c\u6709\u4eba\u6709\u76f8\u5173\u7ecf\u9a8c\uff0c\u8bf7\u544a\u8bc9\u6211\u3002\uff09<\/p>\n
          \u6700\u540e<\/h2>\n
          \u672c\u6587\u4e2d\u5b8c\u5168\u6ca1\u6709\u63d0\u5230\uff0c\u4f46\u662f\u5173\u4e8e\u804a\u5929\u529f\u80fd<\/p>\n
          \u5728\u672c\u6587\u4e2d\u6ca1\u6709\u63d0\u5230\u7684\u662f\uff0c\u5173\u4e8e\u804a\u5929\u529f\u80fd<\/p>\n
            \n
          • \n
              \u8a8d\u8a3c\u60c5\u5831\u3068\u306e\u7d10\u4ed8\u3051<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \n
              • \n
                  \u9001\u4fe1\u958b\u59cb\u6642\u70b9\u3067\u9001\u4fe1\u4e2d\u3068\u3044\u3046\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u30e6\u30fc\u30b6\u30fc\u306b\u4f1d\u308f\u308b\u3088\u3046\u306b\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    \n
                  • \n
                      \u9001\u4fe1\u306b\u5931\u6557\u3057\u305f\u3068\u304d\u306b\u30e6\u30fc\u30b6\u30fc\u306b\u901a\u77e5\u3057\u3066\u518d\u9001\u4fe1\u3092\u4fc3\u3059<\/ul>\n<\/li>\n<\/ul>\n
                       <\/p>\n
                        \n
                      • \n
                          \u9001\u4fe1\u4e2d\u306b\u30a2\u30d7\u30ea\u3092\u843d\u3068\u3057\u3066\u3082\u9001\u4fe1\u304c\u884c\u308f\u308c\u308b\u3088\u3046\u306b\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n
                           <\/p>\n
                            \n
                          • \n
                              \u753b\u50cf\u3084\u52d5\u753b\u306a\u3069\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u62e1\u5145<\/ul>\n<\/li>\n<\/ul>\n
                               <\/p>\n
                                \u30c7\u30fc\u30bf\u306e\u6c38\u7d9a\u5316\u3092\u3057\u3066\u30e6\u30fc\u30b6\u30fc\u30d3\u30ea\u30c6\u30a3\u3092\u9ad8\u3081\u308b<\/ul>\n
                                \u8003\u8651\u5230\u8fd9\u4e9b\u4e8b\u60c5\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u5ba1\u67e5\u9879\u76ee\u6d6e\u73b0\u51fa\u6765\uff0c
                                \n\u6211\u89c9\u5f97\u8981\u5c06\u591a\u5c11\u8d23\u4efb\u4ea4\u7ed9SDK\u771f\u662f\u4e00\u4e2a\u56f0\u96be\u7684\u95ee\u9898\u3002
                                \n\u867d\u7136\u5982\u6b64\uff0c\u5173\u4e8eAmplify iOS SDK\uff0c\u76ee\u524d\u4ecd\u7136\u5904\u4e8e\u8c03\u67e5\u9636\u6bb5\uff0c
                                \n\u6211\u8fd8\u5e0c\u671b\u80fd\u591f\u901a\u8fc7\u8fdb\u4e00\u6b65\u7684\u8c03\u8bd5\u6765\u52a0\u6df1\u6211\u7684\u7406\u89e3\u3002<\/p>\n
                                \u975e\u5e38\u611f\u8c22\u60a8\u4e00\u76f4\u575a\u6301\u89c2\u770b\u76f4\u5230\u6700\u540e?\u200d\u2642\ufe0f<\/p>\n","protected":false},"excerpt":{"rendered":"
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