ios - 如果我同时调用 [[RKClient sharedClient] get @"foo.xml"delegate :self] in two UIViewControllers? 会发生什么

Question

如果我在两个 UIViewController 中同时调用 [[RKClient sharedClient] get@"foo.xml"delegate:self] 会怎样？我有什么问题吗？

viewController_A
{
[[RKClient sharedClient] get:@"foo.xml" delegate:self];
}

viewController_B
{
 [[RKClient sharedClient] get:@"foo.xml" delegate:self];
}

Answer 1

如果您查看 get:delegate: 的 RKClient 实现，它只是执行此操作

- (RKRequest *)get:(NSString *)resourcePath delegate:(id)delegate {
    return [self load:resourcePath method:RKRequestMethodGET params:nil delegate:delegate];
}

并且 load:method:params:delegate: 的实现是

- (RKRequest *)load:(NSString *)resourcePath method:(RKRequestMethod)method params:(NSObject<RKRequestSerializable> *)params delegate:(id)delegate {
    NSURL* resourcePathURL = nil;
    if (method == RKRequestMethodGET) {
        resourcePathURL = [self URLForResourcePath:resourcePath queryParams:(NSDictionary*)params];
    } else {
        resourcePathURL = [self URLForResourcePath:resourcePath];
    }
    RKRequest *request = [[RKRequest alloc] initWithURL:resourcePathURL delegate:delegate];
    [self setupRequest:request];
    [request autorelease];
    request.method = method;
    if (method != RKRequestMethodGET) {
        request.params = params;
    }

    [request send];

    return request;
}

它不使用任何 RKClient 状态/共享数据，因此您不会看到问题。 get:delegate: 方法本身是异步的，所以这些事情无论如何都会在后台发生。