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@interface UIButton (VerticalLayout)

- (void)centerVerticallyWithPadding:(float)padding;
- (void)centerVertically;

@end

@implementation UIButton (VerticalLayout)

- (void)centerVerticallyWithPadding:(float)padding

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func switchRootViewController(rootViewController: UIViewController, animated: Bool, completion: (() -> Void)?) {
        if animated {
            UIView.transitionWithView(window, duration: 0.5, options: .TransitionCrossDissolve, animations: {
                let oldState: Bool = UIView.areAnimationsEnabled()
                UIView.setAnimationsEnabled(false)
                self.window!.rootViewController = rootViewController
                UIView.setAnimationsEnabled(oldState)
            }, completion: { (finished: Bool) -> () in
                if completion {
                    completion!()

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macOS 给 Git(Github) 设置代理（HTTP/SSH）

分辨需要设置的代理

• HTTP 形式：

  git clone https://github.com/owner/git.git

• SSH 形式：

  git clone git@github.com:owner/git.git

一、HTTP 形式

zhaozzq

import UIKit

struct ChineseTransliterator {

  static func transliterate(text: String, sourceView: UIView) {
    let textView = UITextView()
    textView.isHidden = true
    textView.text = text
    textView.selectAll(nil)
    sourceView.addSubview(textView)