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1. When to use delegate and block;2. Retain cycle caused by block;3. Careful use of nsmutable ..., may inadvertently modify the data4. AddressBook frame (after iOS9 replaced with contact frame, seemingly better use)5. Custom Table View cell6. Uitableviewrowaction7. Uiactivityviewcontroller, and Uialertcontroller8. Once again confirm the Viewcontroller life cycle, when will the geometry information for the view be determined (and what else should be do

array as "[]" and an empty dictionary as "[:]". For example, you can set a variable to be known and input parameters to the function: ShoppingList = [] // go shopping and buy something by gashero What development environment is used for Apple's new Swift language? Fees? When can I learn? 1. What is Swift?Go to Baidu! Du Niang tells you that it is Apple's latest programming language, which is more efficient and simple than c, c ++, and objc. Able to develop ios and mac-related apps! It is a lan

following settings variables may relate to ' swift ':Target.swift-framework-search-paths--List of directories to beSearched when locating frameworks for Swift.Target.swift-module-search-paths--List of directories to be searchedWhen locating modules for Swift.Target.use-all-compiler-flags--Try to use compiler the flags for allModules when setting up the Swift expression parser, not just the mainExecutable.This will choose to remove all content related to the word Swift. The first is the related