Completion handler is not called on iOS7 GM
avassetwriter, completionhandler, ios7
Solution
Apparently you need to retain the assetWriter now.
You might try retaining with a strong property it and see if your completion handler gets called. (Be sure to nil that property in completion handler.)
Problem
I'm using AVAssetWriter, and it is perfectly working on iOS6. The problem is, when I called `finishWritingWithCompletionHandler`, the completion handler is not called on iOS7 GM. I called `markAsFinished`, and even `endSessionAtSourceTime` before I call finishWritingWithCompletionHandler. It works fine on iOS6. And even more, on iOS7, it works some times, and then it doesn't work again. I don't know why, but it works if I call the method using alert view. So I tried `performSelectorOnMainThread` and `inBackground`, but it didn't help. Any ideas?