iOS RestKit block

Question

我正在尝试使用带 block 的 Restkit 等待响应。

例子:

NSArray *myArray = ["RESULT OF REST-REQUEST"];

// Working with the array here.

我的一个阻止请求:

- (UIImage*)getPhotoWithID:(NSString*)photoID style:(NSString*)style authToken:(NSString*)authToken {
__block UIImage *image;
NSDictionary *parameter = [NSDictionary dictionaryWithKeysAndObjects:@"auth_token", authToken, nil];
RKURL *url = [RKURL URLWithBaseURLString:@"urlBase" resourcePath:@"resourcePath" queryParameters:parameter];
NSLog(@"%@", [url absoluteString]);
[[RKClient sharedClient] get:[url absoluteString] usingBlock:^(RKRequest *request) {
    request.onDidLoadResponse = ^(RKResponse *response) {
        NSLog(@"Response: %@", [response bodyAsString]); 
        image = [UIImage imageWithData:[response body]];
    };
}];
return image;
}

Answer 1

您不能在此方法中返回任何内容，因为图像的获取将是异步的 - 它必须是 -(void)。

那么，你是做什么的？您应该将调用此方法的操作放在响应 block 中。警惕retain cycles在 block 中。

__block MyObject *selfRef = self;

[[RKClient sharedClient] get:[url absoluteString] usingBlock:^(RKRequest *request) {
    request.onDidLoadResponse = ^(RKResponse *response) {

         NSLog(@"Response: %@", [response bodyAsString]); 

         image = [UIImage imageWithData:[response body]];

         [selfRef doSomethingWithImage:image];

    };
}];