问题
I know that similar questions exist on that site, but I must to be sure what can I do and what can't. I'd like to create a free application but with some restrictions. For example, you can download only one time per day a text for some song. If you want more, than you must buy it. I use for that In App Purchase, but I want also use another payments (credit cards, paypal etc.). If I good understand, I can't do that in the app, but can I use for that some website? I don't have to show that website in the app (but would be nice). Another question, If I am a registered user I can download texts without any restrictions, but I must give in the app username and password. Can I make a registration form in the app, or I can register only on the website?
回答1:
You can make a registration form in your app. But you definately cannot show a website with other payment methods inside your app. Apple will reject the app.
It is best to hide other payment methods from apple alltogether.
As for the free downloads part. It's allowed, apple can't stop you from giving free stuff to your customers. A login authorizing at the external website is just fine. But as long as they can't see your using other payment methods :).
回答2:
You may not able to charge for "virtual" goods without using Apple's official in-app-purchase mechanism without Apple rejecting your App.
But it is perfectly ok (even required!) if you sell real goods to your customers. The guidelines say that you may not use in-app-purchases for real goods but only for app enhancements.
So i would just redirect your users to your website for signup/payment and provide them with a username/password combination to be able to log in with the app. Other internet services like flickr are exactly doing that.
来源：https://stackoverflow.com/questions/4265290/sell-products-in-iphone-app-without-in-app-purchase