dispatch_promise(^{ return md5(email); }).then(^(NSString *md5){ return [NSURLConnection GET:@"http://gravatar.com/%@", md5]; }).then(^(UIImage *gravatarImage){ self.imageView.image = gravatarImage; }); PFQuery *query = [PFQuery queryWithClassName:@"Student"]; [query orderByDescending:@"gpa"]; [[[[[self findAsync:query] continueWithSuccessBlock:^id(BFTask *task) { NSArray *students = task.result;
![コールバック地獄からの脱却!複雑なiOSアニメーションをPromiseの決定版ライブラリPromiseKitですっきり実装する!!! - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/140275397c231beb2475c3d2383949cc832d6410/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-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%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBhcHB3Y2hyJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz04YmY1OGRkMWEzNTkwOTYxN2ZhMTU5ZGIwMDJlNjc0OA%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3D7da13d2bf8056a047c832a5b33a4cd77)