Question

这是我的第一个快速和谷歌应用引擎体验。

我创建了一个简单的java后端，制作了一个发现文档，使用了服务生成器（新的REST服务生成器）来创建客户端库，添加了所有google-specfic客户端库。

我无法在查询中传递编译器错误..

这是代码：

    let service: GTLRHelloworldService =  GTLRHelloworldService()
//no compiler problem with this line.
//my GTLRHellowworldService is included through the bridging headers
        service.isRetryEnabled = true
        set myquery: GTLRHelloworldQuery_GreetingsEstablishHandShake = GTLRHelloworldQuery_GreetingsEstablishHandShake.query()

        service.executeQuery(myquery) { (ticket:GTLRServiceTicket, resp:GTLRHelloworld_HelloGreeting, error: NSError) in
                    nameLabel.text = resp?.message
                }

错误在最后一行：

无法转换类型的值'（GTLRServiceTicket，GTLRHelloworld_HelloGreeting，NSError） - ＆gt; （）'到期望的参数类型'GTLRServiceCompletionHandler？'

为了您的信息，servicegnerator创建的头文件中的GreetingsEstablishHandShake定义是：

/**
 *  GTLRHelloworldQuery_GreetingsEstablishHandShake
 *
 *  Method: helloworld.greetings.establishHandShake
 *
 *  Authorization scope(s):
 *    @c kGTLRAuthScopeHelloworldUserinfoEmail
 */
@interface GTLRHelloworldQuery_GreetingsEstablishHandShake : GTLRHelloworldQuery
// Previous library name was
//   +[GTLQueryHelloworld queryForGreetingsEstablishHandShake]

/**
 *  Fetches a @c GTLRHelloworld_HelloGreeting.
 *
 *  @returns GTLRHelloworldQuery_GreetingsEstablishHandShake
 */
+ (instancetype)query;

@end

并且头文件中的HelloGreeting对象是：

@interface GTLRHelloworld_HelloGreeting : GTLRObject

@property(nonatomic, copy, nullable) NSString *message;

@end

Answer 1

我将swift代码翻译成了目标c。我按照指示进去了 the very helpful google introduction for objective c for rest

我的代码现在运行并与服务器成功通信：

static GTLRHelloworldService *service = nil;
if (!service) {
    service = [[GTLRHelloworldService alloc] init];

    // Have the service object set tickets to retry temporary error conditions
    // automatically
    service.retryEnabled = YES;

    //[GTMHTTPFetcher setLoggingEnabled:YES];
}

GTLRHelloworldQuery_GreetingsEstablishHandShake * query = [GTLRHelloworldQuery_GreetingsEstablishHandShake query];

GTLRServiceTicket *ticket = [service executeQuery:query
            completionHandler:^(GTLRServiceTicket *callbackTicket,
                                GTLRHelloworld_HelloGreeting *resp ,
                                NSError *callbackError) {
                _nameLabel.text = resp.message;}];

如果有人能帮助我了解如何在swift中翻译此代码，我将不胜感激，

从iOS Swift项目调用端点Google API Objective-C Client Library for REST

1 个答案: