我得到一个快速的“在自我之前运行”错误[重复]

Question

我得到一个“不能在属性初始化器中使用实例成员'外观'；属性初始化器在'self'可用之前运行”。请不要建议从代码中删除外观，这是行不通的。我还添加了一个 self.appearence.kcirclebackround 并得到了错误。

这里是设置 kCircleHeightBackground cgfloat 的地方 `open class SCLAlertView: UIViewController {

public struct SCLAppearance {
    let kDefaultShadowOpacity: CGFloat
    let kCircleHeightBackground: CGFloat 
    let kCircleTopPosition: CGFloat
    let kCircleBackgroundTopPosition: CGFloat
    let kCircleHeight: CGFloat
    let kCircleIconHeight: CGFloat
    let kTitleTop:CGFloat
    let kTitleHeight:CGFloat
    let kWindowWidth: CGFloat
    var kWindowHeight: CGFloat
    var kTextHeight: CGFloat
    let kTextFieldHeight: CGFloat
    let kTextViewdHeight: CGFloat
    let kButtonHeight: CGFloat
    let contentViewColor: UIColor
    let contentViewBorderColor: UIColor
    let titleColor: UIColor

`

然后我在“appearance.kCircleHeightBackground”处收到错误

var appearance: SCLAppearance!

// UI Colour
var viewColor = UIColor()

// UI Options
open var iconTintColor: UIColor?
open var customSubview : UIView?



// Members declaration
var baseView = UIView()
var labelTitle = UILabel()
var viewText = UITextView()
var contentView = UIView()
// "I get an error here at appearance.kCircleHeightBackground"__________var circleBG = UIView(frame:CGRect(x:0, y:0, width: appearance.kCircleHeightBackground, height: appearance.kCircleHeightBackground))
var circleView = UIView()
var circleIconView : UIView?
var duration: TimeInterval!
var durationStatusTimer: Timer!
var durationTimer: Timer!
var dismissBlock : DismissBlock?
fileprivate var inputs = [UITextField]()
fileprivate var input = [UITextView]()
internal var buttons = [SCLButton]()
fileprivate var selfReference: SCLAlertView?

public init(appearance: SCLAppearance) {
    self.appearance = appearance
    super.init(nibName:nil, bundle:nil)
    setup()
}

Image of error i get

Answer 1

正如错误所提到的，在初始化程序中设置之前，您无法使用 appearance 属性。在初始化程序运行之前评估您的属性，因此您唯一的选择是将所需的 circleBG 视图自定义移动到初始化程序中，例如您的 setup()-method。