有可用来源的精心制作的完整iOS应用程序的任何示例？

I'd like to look over some really good iOS apps to see how they're put together. I've specified 'complete' because I'm more interested for current purposes in strategy than tactics (but hopefully the code will be tactically well-made too). 'Complete' needn't mean 'large'.I'd like to look over some really good iOS apps