iOS 11打包上传需要绕的坑

Xcode9在项目内新增了一个appIcon的尺寸图,需要添加一张1024*1024的icon,如果未添加,会出现如下错误

WARNING ITMS-90704: "Missing Marketing Icon. 
iOS Apps must include a 1024x1024px Marketing Icon in PNG format. 
Apps that do not include the Marketing Icon cannot be submitted for App Review or Beta App Review."

icon必须是1024*1024,且不能包含alpha通道. 去除alpha通道其实很简单,打开PS 选择 图像-模式-索引颜色,取消勾选透明度即可