notes.md

title	permalink	layout	excerpt	comments
Notes	/notes/	page	Catatan Public agar enggak usah pusing-pusing mengingat.	false

如何获取最上层的 UIViewController/ 展示 alert

let vc = UIViewController()
let topVC = sequence(first: vc, next: { $0.presentedViewController }).reversed().first

• stackoverflow
• twitter

Read in a File

Reading a file into an array of lines is not possible through an easy built-in like in other languages but we can create something short that doesn't need a for using a combination of split and map:

let path = NSBundle.mainBundle().pathForResource("test", ofType: "txt")
let lines = try? String(contentsOfFile: path!).characters.split{$0 == "\n"}.map(String.init)
if let lines=lines {
    lines[0] // O! for a Muse of fire, that would ascend
    lines[1] // The brightest heaven of invention!
    lines[2] // A kingdom for a stage, princes to act
    lines[3] // And monarchs to behold the swelling scene.
}

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