一、R.swift以一种优雅的方式管理资源文件

Github源码地址

https://github.com/mac-cain13/R.swift

安装

1.CocoaPods安装
在run script中贴进下面的代码：
"$PODS_ROOT/R.swift/rswift" "$SRCROOT"
build完成后，会在项目的根目录下发现R.generated.swift这个文件，将它添加进项目。

使用

支持的资源类型

• Images

//使用R.swift之前
let settingsIcon = UIImage(named: "settings-icon")
let gradientBackground = UIImage(named: "gradient.jpg")
//使用R.swift
let settingsIcon = R.image.settingsIcon
let gradientBackground = R.image.gradientJpg

• Storyboards

//使用R.swift之前
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let initialTabBarController = storyboard.instantiateInitialViewController() as? UITabBarController
let settingsController = self.instantiateViewControllerWithIdentifier("settingsController") as? SettingsController
//使用R.swift
let storyboard = R.storyboard.main.instance
let initialTabBarController = R.storyboard.main.initialViewController
let settingsController = R.storyboard.main.settingsController
//通过这个代码来校验运行时storyboard的图片是否都能被加载
// 只在debug模式下有效，会通过断言来提示
R.storyboard.main.validateImages()
//在运行时校验所有的viewController能够被正常加载
mode.R.storyboard.main.validateViewControllers()

• Segues

//使用R.swift之前
performSegueWithIdentifier("openSettings")
//使用R.swift
performSegueWithIdentifier(R.segue.openSettings)

• Nibs

//使用R.swift之前
let nameOfNib = "CustomView"
let customViewNib = UINib(nibName: "CustomView", bundle: nil)
let rootViews = customViewNib.instantiateWithOwner(nil, options: nil)
let customView = rootViews[0] as? CustomView
let viewControllerWithNib = CustomViewController(nibName: "CustomView", bundle: nil)
//使用R.swift
let nameOfNib = R.nib.customView.name
let customViewNib = R.nib.customView
let rootViews = R.nib.customView.instantiateWithOwner(nil, options: nil)
let customView = R.nib.customView.firstView(nil, options: nil)
let viewControllerWithNib = CustomViewController(nib: R.nib.customView)

• Reusable cells

//使用R.swift之前
let textCellNib = UINib(nibName: "TextCell", bundle: nil) 
tableView.registerNib(textCellNib, forCellReuseIdentifier: "TextCellIdentifier")
//使用R.swift
tableView.registerNib(R.nib.textCell)
//cellForRowAtIndexPath中获取cell
let textCell = tableView.dequeueReusableCellWithIdentifier(R.nib.textCell.reuseIdentifier, forIndexPath: indexPath)

• Custom fonts

//使用R.swift之前
let lightFontTitle = UIFont(name: "Acme-Light", size: 22)
//使用R.swift
let lightFontTitle = R.font.acmeLight(size: 22)

• Resource files

//使用R.swift之前
let jsonURL = NSBundle.mainBundle().URLForResource("seed-data", withExtension: "son")
//使用R.swift
let jsonURL = R.file.seedDataJson