{"categories":["UIImage","\u753b\u50cf\u51e6\u7406"],"author_url":"https://blog.hatena.ne.jp/ch3cooh393/","url":"https://ios.ch3cooh.jp/entry/20140301/1393651040","provider_url":"https://hatena.blog","author_name":"ch3cooh393","version":"1.0","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fios.ch3cooh.jp%2Fentry%2F20140301%2F1393651040\" title=\"UIImage\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u30a2\u30eb\u30d5\u30a1\u5024(alpha channel)\u306e\u914d\u5217\u3092\u53d6\u5f97\u3059\u308b - iOS\u30a2\u30d7\u30ea\u958b\u767a\u306e\u9006\u5f15\u304d\u8f9e\u5178\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"UIImage\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u30a2\u30eb\u30d5\u30a1\u5024(alpha channel)\u306e\u914d\u5217\u3092\u53d6\u5f97\u3059\u308b","blog_title":"iOS\u30a2\u30d7\u30ea\u958b\u767a\u306e\u9006\u5f15\u304d\u8f9e\u5178","type":"rich","blog_url":"https://ios.ch3cooh.jp/","description":"iOS\u3067\u306f\u30d3\u30c3\u30c8\u30de\u30c3\u30d7\u306f32bit\u306eRGBA\u3067\u6271\u308f\u308c\u307e\u3059\u3002 \u91cd\u306a\u308a\u3042\u3063\u305f\u8907\u96d1\u306a\u63cf\u753b\u3084UIView\u306e\u30d2\u30c3\u30c8\u30c6\u30b9\u30c8\u3067hitTest:withEvent:\u30e1\u30bd\u30c3\u30c9\u306e\u5224\u5b9a\u306a\u3069\u3067UIImage\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u753b\u50cf\u306e\u30a2\u30eb\u30d5\u30a1\u5024(alpha channel)\u3092\u4f7f\u3044\u305f\u3044\u30b7\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002 \u672c\u8a18\u4e8b\u3067\u306fUIImage\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u914d\u5217\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002 - (NSData *)alphaDataWithImage:(UIImage *)image { CGImageRef imageRef = image.CGImage; CFDataRef dataRef = CGDataProvid\u2026","height":"190","published":"2014-03-01 14:17:20","width":"100%","provider_name":"Hatena Blog"}