BlendMode颜色混合模式枚举值
https://blog.csdn.net/qq_14920635/article/details/75617188
iOS改变图片的颜色
https://mp.weixin.qq.com/s?__biz=MjM5OTM0MzIwMQ==&mid=2652565472&idx=1&sn=2215d673f65c235ba5232254d2472cd4&chksm=bcd2aaee8ba523f831ac05a998d904376ca2143d988b44b7f4d30d1e9353792d5ac26fd23d39&mpshare=1&scene=23&srcid=0224HAagSr6JcGcVDNjjujb6%23rd
