It seems like from the App Store Review Guidelines, you can't use in-app for donations:
21. Charities and contributions
21.1 Apps that include the ability to make donations to recognized charitable organizations must be free 21.2 The collection of donations must be done via a web site in Safari or an SMS
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从应用程序商店审查指南来看，您不能使用应用程序内进行捐赠：
https: //developer.apple.com/app-store/review/guidelines/（来自 http://www.iphonedownloadblog.com/2010/12/24/apple-is-denying-in-app-donations-to-developers/< /a>)
It seems like from the App Store Review Guidelines, you can't use in-app for donations:
https://developer.apple.com/app-store/review/guidelines/ (from http://www.iphonedownloadblog.com/2010/12/24/apple-is-denying-in-app-donations-to-developers/)