ios - 我怎样才能使 collectionViewCell 像 Apple 的应用程序快捷方式上的那样？

Question

我想制作一个 collectionViewCell，就像 Apple 的应用程序快捷方式上的那样，尤其是随机背景色。

快捷方式应用程序用户界面:

Answer 1

首先，如果我的问题不清楚，我很抱歉，但我认为解决了我的问题。我想创建一个与快捷方式应用程序上的类似的 collectionViewCell，我认为我做得很好，这就是我所做的...... Final result

我将我想要的颜色放入一个哈希表中，然后生成一个随机键来获取图片数组，然后创建一个 UIView 类的扩展来制作渐变，并将颜色数组的索引传递给渐变函数我的 cellRandomBackgroundColors()，这是我的 collectionViewCell 类和扩展名(如果有人需要的话)。

import UIKit

class MainCollectionViewCell: UICollectionViewCell {

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupCell()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    //MARK:- UI
    let iconImageView: UIImageView = {
        let imageView = UIImageView()
        imageView.image = UIImage(named: "Folder")
        imageView.contentMode = .scaleAspectFit
        return imageView
    }()

    let checklistNameLabel: UILabel = {
        let label = UILabel()
        label.text = "List"
        label.textColor = UIColor.white
        label.font = UIFont.boldSystemFont(ofSize: 19)
        label.textAlignment = .left
        return label
    }()

    let remainingsLabel: UILabel = {
        let label = UILabel()
        label.text = "2 Remaining"
        label.textColor = UIColor.white
        label.font = UIFont.systemFont(ofSize: 13)
        label.textAlignment = .left
        return label
    }()

    let editButton: UIButton = {
        let button = UIButton(type: UIButton.ButtonType.custom) as UIButton
        button.setImage(UIImage(named: "More"), for: UIControl.State.normal)
        return button
    }()


    //MARK:- Setup Cell
    func setupCell() {
        roundCorner()
        gradientBackgroundColor()
        setCellShadow()
        self.addSubview(iconImageView)
        self.addSubview(checklistNameLabel)
        self.addSubview(remainingsLabel)
        self.addSubview(editButton)
        iconImageView.anchor(top: safeTopAnchor, left: safeLeftAnchor, bottom: nil, right: nil, paddingTop: 8, paddingLeft: 8, paddingBottom: 0, paddingRight: 0, width: 36, height: 36)
        checklistNameLabel.anchor(top: iconImageView.bottomAnchor, left: safeLeftAnchor, bottom: nil, right: nil, paddingTop: 18, paddingLeft: 8, paddingBottom: 0, paddingRight: 0)
        remainingsLabel.anchor(top: checklistNameLabel.bottomAnchor, left: safeLeftAnchor, bottom: nil, right: nil, paddingTop: 4, paddingLeft: 8, paddingBottom: 0, paddingRight: 0)
        editButton.anchor(top: safeTopAnchor, left: nil, bottom: nil, right: safeRightAnchor, paddingTop: 8, paddingLeft: 0, paddingBottom: 0, paddingRight: 8, width: 36, height: 36)
    }

    //MARK:- Methods
    func cellRandomBackgroundColors() -> [UIColor] {
        //Colors
        let red = [#colorLiteral(red: 0.9654200673, green: 0.1590853035, blue: 0.2688751221, alpha: 1),#colorLiteral(red: 0.7559037805, green: 0.1139892414, blue: 0.1577021778, alpha: 1)]
        let orangeRed = [#colorLiteral(red: 0.9338900447, green: 0.4315618277, blue: 0.2564975619, alpha: 1),#colorLiteral(red: 0.8518816233, green: 0.1738803983, blue: 0.01849062555, alpha: 1)]
        let orange = [#colorLiteral(red: 0.9953531623, green: 0.54947716, blue: 0.1281470656, alpha: 1),#colorLiteral(red: 0.9409626126, green: 0.7209432721, blue: 0.1315650344, alpha: 1)]
        let yellow = [#colorLiteral(red: 0.9409626126, green: 0.7209432721, blue: 0.1315650344, alpha: 1),#colorLiteral(red: 0.8931249976, green: 0.5340107679, blue: 0.08877573162, alpha: 1)]
        let green = [#colorLiteral(red: 0.3796315193, green: 0.7958304286, blue: 0.2592983842, alpha: 1),#colorLiteral(red: 0.2060100436, green: 0.6006633639, blue: 0.09944178909, alpha: 1)]
        let greenBlue = [#colorLiteral(red: 0.2761503458, green: 0.824685812, blue: 0.7065336704, alpha: 1),#colorLiteral(red: 0, green: 0.6422213912, blue: 0.568986237, alpha: 1)]
        let kindaBlue = [#colorLiteral(red: 0.2494148612, green: 0.8105323911, blue: 0.8425348401, alpha: 1),#colorLiteral(red: 0, green: 0.6073564887, blue: 0.7661359906, alpha: 1)]
        let skyBlue = [#colorLiteral(red: 0.3045541644, green: 0.6749247313, blue: 0.9517192245, alpha: 1),#colorLiteral(red: 0.008423916064, green: 0.4699558616, blue: 0.882807076, alpha: 1)]
        let blue = [#colorLiteral(red: 0.1774400771, green: 0.466574192, blue: 0.8732826114, alpha: 1),#colorLiteral(red: 0.00491155684, green: 0.287129879, blue: 0.7411141396, alpha: 1)]
        let bluePurple = [#colorLiteral(red: 0.4613699913, green: 0.3118675947, blue: 0.8906354308, alpha: 1),#colorLiteral(red: 0.3018293083, green: 0.1458326578, blue: 0.7334778905, alpha: 1)]
        let purple = [#colorLiteral(red: 0.7080290914, green: 0.3073516488, blue: 0.8653779626, alpha: 1),#colorLiteral(red: 0.5031493902, green: 0.1100070402, blue: 0.6790940762, alpha: 1)]
        let pink = [#colorLiteral(red: 0.9495453238, green: 0.4185881019, blue: 0.6859942079, alpha: 1),#colorLiteral(red: 0.8123683333, green: 0.1657164991, blue: 0.5003474355, alpha: 1)]

        let colorsTable: [Int: [UIColor]] = [0: red, 1: orangeRed, 2: orange, 3: yellow, 4: green, 5: greenBlue, 6: kindaBlue, 7: skyBlue, 8: blue, 9: bluePurple, 10: bluePurple, 11: purple, 12: pink]

        let randomColors = colorsTable.values.randomElement()
        return randomColors!
    }

    func gradientBackgroundColor() {
        let colors = cellRandomBackgroundColors()
        self.contentView.setGradientBackgroundColor(colorOne: colors[0], colorTow: colors[1])
    }

    func roundCorner() {
        self.contentView.layer.cornerRadius = 12.0
        self.contentView.layer.masksToBounds = true
        self.contentView.layer.borderWidth = 1.0
        self.contentView.layer.borderColor = UIColor.clear.cgColor
    }
}

创建渐变的扩展。

import UIKit

extension UIView {
    func setGradientBackgroundColor(colorOne: UIColor, colorTow: UIColor) {
        let gradientLayer = CAGradientLayer()
        gradientLayer.frame = bounds
        gradientLayer.colors = [colorOne.cgColor, colorTow.cgColor]
        gradientLayer.locations = [0.0, 1.0]
        gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
        gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.0)

        layer.insertSublayer(gradientLayer, at: 0)
    }
}