使用

#import "ATNetworking.h"

查询 API。

    [[ATNetworking sharedInstance] requestURL:@"https://www.googleapis.com/books/v1/volumes?q=harry+potter" completionHandler:^(NSDictionary *item, NSArray *items, NSError *error, NSDictionary *errorDictionary, NSURLResponse *response, NSDictionary *data) {

        if(!error){
            // Populates 'items' on API responses that contain list of objects.
            // Populates 'item' on API responses that contain a single object.

        }else{
            NSLog(@"An error occurr: %@", error.userInfo[NSLocalizedDescriptionKey]);

        }

    }];

测试

在 Xcode 中打开项目/ATNetworking.xcworkspace，然后按 Command-U