1. When to use delegate and block;
2. Retain cycle caused by block;
3. Careful use of nsmutable ..., may inadvertently modify the data
4. AddressBook frame (after iOS9 replaced with contact frame, seemingly better use)
5. Custom Table View cell
6. Uitableviewrowaction
7. Uiactivityviewcontroller, and Uialertcontroller
8. Once again confirm the Viewcontroller life cycle, when will the geometry information for the view be determined (and what else should be done in viewdidlayoutsubviews?). )
9. Mfmessagecomposeviewcontroller after the recipient more, reaction and slow, how to solve? (I don't know yet)
The usefulness of an object at cycle
Uisearchcontroller.
--Tools and open source code
iOS Development Summary (A1)-The second small app development come to an conclusion, hope and last as smoothly through the Apple audit, the next few days to the development process to make a summary