断言失败ios [UICGColor encodeWithCoder：]

Question

断言失败 - [UICGColor encodeWithCoder:]，/BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3505.16/UIColor.m:1455

从UIActivityViewController

打开邮件时，应用程序崩溃了