{"author_url":"https://blog.hatena.ne.jp/yohhoy/","provider_url":"https://hatena.blog","width":"100%","categories":["Objective-C"],"type":"rich","blog_title":"yohhoy\u306e\u65e5\u8a18","image_url":null,"blog_url":"https://yohhoy.hatenadiary.jp/","title":"Objective-C\u7684 null(nil)\u5b89\u5168","provider_name":"Hatena Blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20200501%2Fp1\" title=\"Objective-C\u7684 null(nil)\u5b89\u5168 - yohhoy\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2020-05-01 00:00:00","version":"1.0","url":"https://yohhoy.hatenadiary.jp/entry/20200501/p1","description":"Objective-C\u306b\u304a\u3044\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u9001\u4fe1\u5148\u306e\u30ec\u30b7\u30fc\u30d0\u304cnil\u306e\u5834\u5408\u3001Objective-C\u30e9\u30f3\u30bf\u30a4\u30e0\u306f\u306a\u306b\u3082\u3057\u306a\u3044\uff08\u30a8\u30e9\u30fc\u306f\u767a\u751f\u305b\u305a\u30e1\u30bd\u30c3\u30c9\u3082\u547c\u3073\u51fa\u3055\u308c\u306a\u3044\uff09\u3002\u30e1\u30bd\u30c3\u30c9\u304c\u623b\u308a\u5024\u578b\u3092\u6301\u3064\u5834\u5408\u3001\u5024 0 \u76f8\u5f53\u304c\u8fd4\u5374\u3055\u308c\u305f\u304b\u306e\u3088\u3046\u306b\u632f\u308b\u821e\u3046\u3002 Sending Messages to nil In Objective-C, it is valid to send a message to nil -- it simply has no effect at runtime. There are several patterns in Cocoa that take advantage of this \u2026","author_name":"yohhoy"}