从private到fileprivate
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从UIBarButtonItemStyle.Plain到UIBarButtonItemStyle.plain
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从
.CGColor到.cgColor
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从NSBundle.mainBundle().infoDictionary到Bundle.main.infoDictionary更精简
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方法名位置调整
从.popViewControllerAnimated(true)到popViewController(animated: true)，animated飞升了
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内部参数外部参数
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通知中心嗨起来
NSNotificationCenter.defaultCenter()到NotificationCenter.default
键盘通知名从UIKeyboardWillChangeFrameNotification到 NSNotification.Name.UIKeyboardWillChangeFrame
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这个开始有点头晕了
好像是selector的引用从Selector("interactivePopGestureRecognizer")到#selector(getter: UINavigationController.interactivePopGestureRecognizer)
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从NSTimeInterval到TimeInterval
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UITextViewDelegate有变，这个一敲Xcode会有提示的，不用记
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GCD更精简
DispatchQueue.global().async {
DispatchQueue.main.async {
self.label?.text = "finished"
}
}
let delay = DispatchTime.now() + .seconds(60)
DispatchQueue.main.after(when: delay) {
// Do something
}
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已放弃更新，太多报错，Swift真是坑
