Question

我遇到了两个错误。当我在新的xcode 8 swift 3.0中打开我的项目时，我收到此错误我不知道如何纠正此错误。我已经解决了其他一些错误。但是在这一行中就上述错误触及了这一点。

 func keyboardWillShow(_ notification: Notification) {
        keyboardHasBeenShown = true

        guard let userInfo = (notification as NSNotification).userInfo else {return}
        guard let endKeyBoardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue.minY else {return}

        if tmpContentViewFrameOrigin == nil {
        tmpContentViewFrameOrigin = self.contentView.frame.origin
        }

        if tmpCircleViewFrameOrigin == nil {
        tmpCircleViewFrameOrigin = self.circleBG.frame.origin
        }

        var newContentViewFrameY = self.contentView.frame.maxY - endKeyBoardFrame
        if newContentViewFrameY < 0 {
            newContentViewFrameY = 0
        }
        let newBallViewFrameY = self.circleBG.frame.origin.y - newContentViewFrameY
        self.contentView.frame.origin.y -= newContentViewFrameY
        self.circleBG.frame.origin.y = newBallViewFrameY
    }

在上面的方法中：

我的错误位于以下行：

guard let endKeyBoardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue.minY else {return}

错误：

Initializer for conditional binding must have Optional type, not 'CGFloat'

以下方法中的第二个错误：

open func showCustom(_ title: String, subTitle: String, color: UIColor, icon: UIImage, closeButtonTitle:String?=nil, duration:TimeInterval=0.0, colorStyle: UInt=SCLAlertViewStyle.success.defaultColorInt, colorTextButton: UInt=0xFFFFFF, circleIconImage: UIImage? = nil, animationStyle: SCLAnimationStyle = .topToBottom) -> SCLAlertViewResponder {


        var red: CGFloat = 0, green: CGFloat = 0, blue: CGFloat = 0, alpha: CGFloat = 0

        color.getRed(&red, green: &green, blue: &blue, alpha: &alpha)

        var colorAsUInt32 : UInt32 = 0
        colorAsUInt32 += UInt32(red * 255.0) << 16 + UInt32(green * 255.0) << 8 + UInt32(blue * 255.0)

        let colorAsUInt = UInt(colorAsUInt32)

        return showTitle(title, subTitle: subTitle, duration: duration, completeText:closeButtonTitle, style: .success, colorStyle: colorAsUInt, colorTextButton: colorTextButton, circleIconImage: icon, animationStyle: animationStyle)
    }

此行中的错误：

 colorAsUInt32 += UInt32(red * 255.0) << 16 + UInt32(green * 255.0) << 8 + UInt32(blue * 255.0)

错误：

表达太复杂，无法在合理的时间内解决;考虑将表达式分解为不同的子表达式

Answer 1

需要添加问号：

guard let endKeyBoardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? AnyObject).cgRectValue.minY else {return}

colorAsUInt32 += UInt32(red * 255.0) << 16
colorAsUInt32 += UInt32(green * 255.0) << 8
colorAsUInt32 += UInt32(blue * 255.0)

条件绑定的初始化程序必须具有可选类型，而不是＆＃39; CGFloat＆＃39;

1 个答案: