查看苹果各大系统的服务状态：
中国区服务：https://www.apple.com/cn/support/systemstatus/
美国区服务：https://developer.apple.com/system-status/
遇到2.1大礼包要耐心，细心的一条条认证与苹果沟通。
遇到4.3礼包，要继续混淆代码和资源。
首次上内购的包，过审但没发布时无法充值的，因为此时的内购项ID都是无效的。
越狱机有时候是无法测内购的，有日志可看。
过审后用兑换码下载的包或者上线后的包出现启动闪退，并有如下日志：
Jul 23 11:11:31 amins-iPad kernel[0] <Debug>: AppleFairplayTextCrypterSession::fairplayOpen() failed, error -42112
Jul 23 11:11:31 amins-iPad backboardd[35] <Warning>: Unable to obtain a task name port right for pid 340: (os/kern) failure (5)
Jul 23 11:11:31 amins-iPad com.apple.launchd[1] (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687][340]) <Notice>: (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) Exited: Killed: 9
Jul 23 11:11:31 amins-iPad com.apple.launchd[1] (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) <Error>: (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) assertion failed: 11D167: launchd + 74759 [666E5F5B-36E7-3134-852E-A4BFEF07CD31]: 0x16
Jul 23 11:11:31 amins-iPad com.apple.launchd[1] (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) <Error>: (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) assertion failed: 11D167: launchd + 74759 [666E5F5B-36E7-3134-852E-A4BFEF07CD31]: 0x16
Jul 23 11:11:31 amins-iPad backboardd[35] <Warning>: Could not set priority of [340] to 1, priority: No such process
Jul 23 11:11:31 amins-iPad backboardd[35] <Warning>: Could not set priority of [340] to 0, priority: No such process
Jul 23 11:11:31 amins-iPad com.apple.launchd[1] (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) <Notice>: (UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]) Throttling respawn: Will start in 2147483647 seconds
Jul 23 11:11:31 amins-iPad backboardd[35] <Warning>: Application 'UIKitApplication:com.punchboxstudios.shikonglierenhd[0x7687]' exited abnormally with signal 9: Killed: 9
说明是苹果的问题，此时可联系客服，或用新的兑换码重新下载一个。