Question

我试图使用Xcode游乐场制作东西。当我尝试使用自动布局功能时，出现一条错误消息类型“ GameView”的值没有成员“ view”

这是我的代码，还有更多代码，但是我只添加了相关的部分。

import Foundation
import UIKit
import SpriteKit
public class GameView : UIView{
self.frame.size.width, height: self.frame.size.height))
    override public init(frame: CGRect) {
        super.init(frame: CGRect(x: 0, y: 0, width: 1500, height: 1000))

    }
    public override func addConstraints(_ constraints: [NSLayoutConstraint]) {
        self.view.addConstraints([
            NSLayoutConstraint(item: GameView, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1.0, constant: 64),
            NSLayoutConstraint(item: GameView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1.0, constant: 64),
            NSLayoutConstraint(item: GameView, attribute: .centerX, relatedBy: .equal, toItem: self.view, attribute: .centerX, multiplier: 1.0, constant: 0),
            NSLayoutConstraint(item: GameView, attribute: .centerY, relatedBy: .equal, toItem: self.view, attribute: .centerY, multiplier: 1.0, constant: 0),
            ])
    }
}

谢谢！

Answer 1

使用“自我”而不是“ self.view”。并且您应该使用GameView.self。

import Foundation
import UIKit
import SpriteKit
public class GameView : UIView{
    override public init(frame: CGRect) {
        super.init(frame: CGRect(x: 0, y: 0, width: 1500, height: 1000))

    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    public override func addConstraints(_ constraints: [NSLayoutConstraint]) {
        self.addConstraints([
            NSLayoutConstraint(item: GameView.self, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1.0, constant: 64),
            NSLayoutConstraint(item: GameView.self, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1.0, constant: 64),
            NSLayoutConstraint(item: GameView.self, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1.0, constant: 0),
            NSLayoutConstraint(item: GameView.self, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1.0, constant: 0),
            ])
    }
}

Answer 2

好吧，它没有view属性，我想您只想使用self。您可能从某种UIViewController复制了此代码。

Xcode：类型'GameView'的值没有成员'view'

2 个答案: