iOS 10自定义导航栏高度

概述我实现了自定义导航栏高度,通过以下代码继承它 class TMNavigationBar: UINavigationBar { ///The height you want your navigation bar to be of static let navigationBarHeight: CGFloat = 44.0 ///The difference betwe 我实现了自定义导航栏高度,通过以下代码继承它

class TMNavigationbar: UINavigationbar {    ///The height you want your navigation bar to be of    static let navigationbarHeight: CGfloat = 44.0    ///The difference between new height and default height    static let heightIncrease:CGfloat = navigationbarHeight - 44    overrIDe init(frame: CGRect) {        super.init(frame: frame)        initialize()    }    required init?(coder aDecoder: NSCoder) {        super.init(coder: aDecoder)        initialize()    }    private func initialize() {        let shift = TMNavigationbar.heightIncrease/2        ///transform all vIEw to shift upward for [shift] point        self.transform =            CGAffinetransformMakeTranslation(0,-shift)    }    overrIDe func layoutSubvIEws() {        super.layoutSubvIEws()        let shift = TMNavigationbar.heightIncrease/2        ///Move the background down for [shift] point        let classnamesToReposition: [String] = ["_UINavigationbarBackground"]        for vIEw: UIVIEw in self.subvIEws {            if classnamesToReposition.contains(NsstringFromClass(vIEw.dynamicType)) {                let bounds: CGRect = self.bounds                var frame: CGRect = vIEw.frame                frame.origin.y = bounds.origin.y + shift - 20.0                frame.size.height = bounds.size.height + 20.0                vIEw.frame = frame            }        }    }    overrIDe func sizeThatFits(size: CGSize) -> CGSize {        let amendedSize:CGSize = super.sizeThatFits(size)        let newSize:CGSize = CGSizeMake(amendedSize.wIDth,TMNavigationbar.navigationbarHeight);        return newSize;    }}

仅在iOS 10上出现以下问题:(条形图和视图之间的黑色空格)

不知道那里发生了什么.但是在故事板中它产生了这个警告,并且没有办法在IB中修复它(警告仅在我更改IB中的导航栏的子类时出现).

解决方法 适用于iOS 10,Swift 3.0：

extension UINavigationbar {    open overrIDe func sizeThatFits(_ size: CGSize) -> CGSize {        let screenRect = UIScreen.main.bounds        return CGSize(wIDth: screenRect.size.wIDth,height: 64)    }}

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