complicationで使う画像は、透過型の白黒のpngじゃないと、 CLKImageProvider(onePieceImage: UIImage(named: "Modular")!) で、存在しないってなる。 存在しないんじゃなくて、画像が適切じゃないって言ってほしい。 半日、ハマった。 參考 ios - Complication Image is White Box - watchOS 2 ClockKit - Stack Overflow you have to create a monochrome png image with the alpha-channel さすがstack over flow。
![watchOS complicationの画像 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/6b94eb9091622dbfda1e439cdd85f0a206196e89/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-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9d2F0Y2hPUyUyMGNvbXBsaWNhdGlvbiVFMyU4MSVBRSVFNyU5NCVCQiVFNSU4MyU4RiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9MTlhOTc2MWUxYWFkMzVmMWYyZjlmMWRmNDliODQzZjk%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBua21ydGtoZCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9ZWZlNzEzY2ZiZDIzMTU5M2U3MmExMmUzYjZiYjE2YWE%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3De8079810fbd03ccef70b493734358d56)