// 引数名付きの定義 -(void)registerWithName:(NSString*)name completionBlock:(void (^)(NSString* accessToken, NSError* error)) completionBlock; // 補完入力後、特に引き数名を変えない場合はblocksの処理だけ書けばよい [self registerWithName:@"fuga" completionBlock:^(NSString *accessToken, NSError *error) { }]; // 引数名省略の定義 -(void)registerWithName:(NSString*)name completionBlock:(void (^)(NSString* , NSError* )) completionBlock; // 補完入力後、わざわ
![Blocksの定義の引き数名は省略しない方がよい - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/e56ea1a8bd1881da006fdf73aa4e5d87ef16ac20/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-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9QmxvY2tzJUUzJTgxJUFFJUU1JUFFJTlBJUU3JUJFJUE5JUUzJTgxJUFFJUU1JUJDJTk1JUUzJTgxJThEJUU2JTk1JUIwJUU1JTkwJThEJUUzJTgxJUFGJUU3JTlDJTgxJUU3JTk1JUE1JUUzJTgxJTk3JUUzJTgxJUFBJUUzJTgxJTg0JUU2JTk2JUI5JUUzJTgxJThDJUUzJTgyJTg4JUUzJTgxJTg0JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz04Mzc1Mzk1NGI1ZTZiYjBiNTRiYTU4NjNiNTE3MjlhMQ%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwbW9ubzA5MjYmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTZmMGJiMWE2MzVmMmQ2OTU4MjA3OGU5NjI0ZGMwYWNk%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3Da91e5c4912fde1dffb05c200f1f9dd70)