I love the Itellij and i use it every day for java development, but the AppCode is a disappointment. I started to develop on ios again after 5 years, so i choose the swift, but I realized almost nothing works yet in AppCode. The syntax checking, code completion doesn't work or very rarely and randomly, the debugger in a brakepoint sometimes gives weird, wrong values which are different and proper in Xcode. As i remember it was in case of some kind of generic class. I think the Xcode is ineligible for a serious project. Therefore The AppCode would be the best, if i could use it like the Intellij with Java.
I tried with OC-145.1616.7 (EAP) and the previous released version.