已解决.

所有配置均正确.上面的代码按预期工作.唯一的事情是，我忘记了在iOS项目设置中加载 Entitlements.plist 文件.这就是为什么我得到canmakepaymentsUsingNetwork(networks)总是 false 的主要原因.

Everything was configured correctly. Above code works as expected. Only thing is, I forgot to load Entitlements.plist file in iOS Project Settings. That is the main reason why i am getting canmakepaymentsUsingNetwork(networks) always false.