没有选择器的类方法...即使Xcode识别方法

时间:2013-06-13 20:43:21

标签: objective-c debugging compiler-errors selector class-method

我有3个文件:main.m,CGOAuth.h,CGOAuth.m(取自https://github.com/guicocoa/cocoa-oauth

在main.m中,我调用(在主方法中):

 [GCOAuth URLRequestForPath:@"websites" 
  HTTPMethod:@"GET" 
  parameters:nil scheme:@"https" 
  host:@"blah"           
  consumerKey:CONSUMER_KEY 
  consumerSecret:CONSUMER_SECRET 
  accessToken:accessToken 
  tokenSecret:tokenSecret];

我得到的错误是它表示选择器URLRequestforPath没有类方法....

在GCOAuth.h中,我导入main.m,是声明:

 + (NSURLRequest *)URLRequestForPath:(NSString *)path
                     HTTPMethod:(NSString *)HTTPMethod
                     parameters:(NSDictionary *)parameters
                         scheme:(NSString *)scheme
                           host:(NSString *)host
                    consumerKey:(NSString *)consumerKey
                 consumerSecret:(NSString *)consumerSecret
                    accessToken:(NSString *)accessToken
                    tokenSecret:(NSString *)tokenSecret;

实施在GCOAuth.m中。

我试过这样做:

[[GCOAuth alloc] URLRequestForPath:@"websites" 
  HTTPMethod:@"GET" 
  parameters:nil scheme:@"https" 
  host:@"blah"           
  consumerKey:CONSUMER_KEY 
  consumerSecret:CONSUMER_SECRET 
  accessToken:accessToken 
  tokenSecret:tokenSecret];

但我只是得到错误:没有可见的@interface声明选择器URLRequestForPath ....

我看不出我做错了什么。如果选择器没有类方法,为什么Xcode的自动完成提供了我使用的方法?

编辑(这是CGOAuth.m的实施):

 + (NSURLRequest *)URLRequestForPath:(NSString *)path
                     HTTPMethod:(NSString *)HTTPMethod
                     parameters:(NSDictionary *)parameters
                         scheme:(NSString *)scheme
                           host:(NSString *)host
                    consumerKey:(NSString *)consumerKey
                 consumerSecret:(NSString *)consumerSecret
                    accessToken:(NSString *)accessToken
                    tokenSecret:(NSString *)tokenSecret {
// check parameters
if (host == nil || path == nil) { return nil; }

// create object
GCOAuth *oauth = [[GCOAuth alloc] initWithConsumerKey:consumerKey
                                       consumerSecret:consumerSecret
                                          accessToken:accessToken
                                          tokenSecret:tokenSecret];
oauth.HTTPMethod = HTTPMethod;
oauth.requestParameters = parameters;

NSString *encodedPath = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *URLString = [NSString stringWithFormat:@"%@://%@%@", scheme, host, encodedPath];
if ([[HTTPMethod uppercaseString] isEqualToString:@"GET"]) {
    // Handle GET
    if ([oauth.requestParameters count]) {
        NSString *query = [GCOAuth queryStringFromParameters:oauth.requestParameters];
        URLString = [NSString stringWithFormat:@"%@?%@", URLString, query];
    }
}
oauth.URL = [NSURL URLWithString:URLString];

NSMutableURLRequest *request = [oauth request];
if (![[HTTPMethod uppercaseString] isEqualToString:@"GET"] && [oauth.requestParameters count]) {
    // Add the parameters to the request body for non GET requests
    NSString *query = [GCOAuth queryStringFromParameters:oauth.requestParameters];
    NSData *data = [query dataUsingEncoding:NSUTF8StringEncoding];
    NSString *length = [NSString stringWithFormat:@"%lu", (unsigned long)[data length]];
    [request setHTTPBody:data];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setValue:length forHTTPHeaderField:@"Content-Length"];
}

// return
return request;

}

以下是我尝试过的更多内容,但没有奏效,重新启动Xcode并进行干净。

我知道Xcode识别该方法,因为(a)代码完成为我提供了上述方法的名称,(b)它出现在侧栏(左侧)的分层视图中。 时间至关重要!

1 个答案:

答案 0 :(得分:0)

您是否在主要课程中导入了CGOAuth.h?检查项目构建阶段是否存在CGOAuth类。