UIColor から UIImage を作りたい場面があったので、調べてみたところ、以下のような感じで作成することができました。 UIImage *(^createImageFromUIColor)(UIColor *) = ^(UIColor *color) { CGRect rect = CGRectMake(0, 0, 1, 1); UIGraphicsBeginImageContext(rect.size); CGContextRef contextRef = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(contextRef, [color CGColor]); CGContextFillRect(contextRef, rect); UIImage *img = UIGraphicsGetImageF
![UIColor から UIImage を作る - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/b0c3b75c3699da443a9634820c64f7f3ca5d7683/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-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9VUlDb2xvciUyMCVFMyU4MSU4QiVFMyU4MiU4OSUyMFVJSW1hZ2UlMjAlRTMlODIlOTIlRTQlQkQlOUMlRTMlODIlOEImdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT01NiZ0eHQtY2xpcD1lbGxpcHNpcyZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTQ5OWY0YjI5ZDFiNzM1MjQ1ODZiNmIwZmE0NTBjM2Fl%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwb2RvcnJ5JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzYmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz00MTcwNjE5YjFlMDg1MWVhYzk5MGUwMjcxNWJkNWVkYg%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D715ecb8af43b89c92ead42745719212e)