问题
Each time i make small changes, i need to submit the app for approval and need to wait to review process to complete, so till what extent i can exploit dynamic code insertion or at least can i change the view of a view controller using the nib file which i will be downloading to document directory dynamically?
回答1:
For the most part, the answer is no, and intentionally so. In particular, you cannot run executable code that you download. If you figured out a workaround to allow it technically (and I have at least one or two thoughts in mind on how I'd attack it), it would definitely run counter to Apple's approval process.
On the other hand, a nib file is data, not code. That you can definitely read from disk and instantiate using [UINib nibWithData:bundle:]. This is a pretty big hassle, though, and I don't particularly recommend it. But it's relatively straightforward (unless you want to correctly handle low memory situations, in which case it's a bit more of a hassle).
Of course you can always have dynamic code by putting it in a webview and writing it in JavaScript.
In the end, though, the review process is the way it is on purpose, and I recommend developers adapt their development cycle to include it. That generally means having fewer releases with heavier testing because "one quick fix" is expensive.
来源：https://stackoverflow.com/questions/8416010/is-dynamic-code-insertion-possible-in-iphone