In a previous article, I introduced a way to install multiple versions at the same time Xcode Tool ofUse xcode-install to manage Xcode versionsBut when there are multiple Xcodes in your system at the same time，Will cause system confusion，Make Xcode plugins unrecognizable，The main manifestation is that it is not visible at all in the system preferences Xcode pluginOptions-just like you[……]
we all know，There is pyenv when using Python，If you use ruby, there is rbenv，Can easily control and manage the version of the programming language environment，Then，Is there any way，Can Xcode switch versions like this?
Every time Xcode releases an update，More or not has become a problem，Difficult to download，Can't resume，Can't use third-party tools to download，[……]
With the upgrade version of Xcode，speedMore slowly，In particular, Yiyanbuge "Whiteboard"I believe we will have problems encountered。
This is the very thing affecting development efficiency。If it is possible，Then we will Xcode cache file into memory，It should be much faster speed。(Although rmbp of ssd have a very fast，But compared to memory，Or far worse -For mechanical hard drive[……]
Make sure developers have had such trouble：Version submitted wrong!
Version of the compiler and testing more，When the inevitable submitted only to find the wrong version number。Or is the background version number is correct，Reception forget to change the version number。In fact，Allows reception automatically obtain the version number of the background data，For example, this：
let info = Bundle.main.infoDictionary!
version.text = "Version \(info["CFBundleShortVersionString"]!) (build \(info["CFBundleVersion"]!))"
Background version number[……]
In Xcode，We give iOS platform App，Will inevitably have to add a button to bind an event，At this time there is a statement，You will find a button touch event already not before a "Touch Up Inside" so simple。
Referring to FIG title，There are at least not so much in some events can be for your choice，In more features at the same time，Novices may be more ignorant of the force?[……]
Update：A blink of an eye 5 Years passed，This article is also invalid... Now Xcode no longer allows random installation of plugins，The only one recommended at the moment Swift Format for Xcode，Everybody，mutual encouragement。
Development on OSX，Then you necessarily involves dealing with this famous IDE。after all，We use IDE is to improve productivity[……]
Swift is already open source version 2.2 The，However, with respect to 2.1 No particular improvement。Swift now supports OS X and Ubuntu，Supported on Ubuntu 14.04 and 15.10 Two versions，You canThis pageDownload the latest version compile(There is no official stable version)Now I will talk about how to use it on both platforms。[……]
Swift is now open source。Apple today launched the open source community Swift，New tools and resources include the same stunning：
- Swift.org - A Swift used to do open source community site；
- Public code repository github.com/apple；
- A new Swift Package Manager to easily share projects and compile code；
Do app using Xcode application development time，UI interface design what application is commonplace，But every time and then run the simulator to view the output of a very troublesome thing，Especially when you need to modify many elements、And the need to fit a variety of screen sizes with the time - after all,，Now iPhone product line is no longer so a single。
So，Breath simulator run three or four such things fear[……]