如何在iOS15中/之后將影像設定為UIButton的右邊緣角？（迅速）

我在 iOS 15 中遇到了一個問題，將影像設定到右上角時不起作用，而在 iOS 15 之前它可以正常作業。
我想要達到的目標：

我正在實作的目標：

這是我用于 iOS 15 的完整代碼：

import UIKit

class ViewController: UIViewController { 
 
    override func viewDidLoad() {
        super.viewDidLoad()
        let btnDropdown = getDropdownButton()
        btnDropdown.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(btnDropdown)
        NSLayoutConstraint.activate([
            btnDropdown.heightAnchor.constraint(equalToConstant: 44),
            btnDropdown.leadingAnchor.constraint(equalTo: view.layoutMarginsGuide.leadingAnchor),
            btnDropdown.trailingAnchor.constraint(equalTo: view.layoutMarginsGuide.trailingAnchor),
            btnDropdown.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor, constant: 30)
        ])
    }
    
    fileprivate func getDropdownButton() -> UIButton {
        var button: UIButton!
        if #available(iOS 15.0, *),
           let btnConfig = getButtonConfiguration() {
            button = UIButton(configuration: btnConfig)
        } else {
            button = UIButton(type: .custom)
        }
        button.setTitle("Select Tags", for: .normal)
        setupGeneralSettings(for: button)
        return button
    }
    
    fileprivate func setupGeneralSettings(for button: UIButton) {
        button.titleEdgeInsets = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 8)
        button.contentEdgeInsets = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 8)
        button.contentHorizontalAlignment = .left
        button.layer.borderWidth = 1
        button.layer.cornerRadius = 8
        button.clipsToBounds = true
        button.backgroundColor = .lightGray.withAlphaComponent(0.3)
        button.titleLabel?.font = UIFont.systemFont(ofSize: 14, weight: .medium)
        button.setTitleColor(UIColor.black, for: .normal)
    }
    
    @available(iOS 15.0, *)
    fileprivate func getButtonConfiguration() -> UIButton.Configuration? {
        var btnConfig = UIButton.Configuration.plain()
        btnConfig.buttonSize = .medium
        btnConfig.titleAlignment = .leading
        btnConfig.imagePlacement = .trailing
        btnConfig.image = UIImage(systemName: "arrowtriangle.down.circle")
        btnConfig.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 8, bottom: 0, trailing: 8)
        btnConfig.titleTextAttributesTransformer = UIConfigurationTextAttributesTransformer { incoming in
            var outgoing = incoming
            outgoing.font = UIFont.systemFont(ofSize: 14, weight: .medium)
            return outgoing
        }
        return btnConfig
    }
}

注意： 當我說 iOS 15 時，我的意思是我正在使用 UIButton.Configuration，因為 UIButton 的 titleEdgeInset、imageEdgeInset 和 contentEdgeInset 在 iOS 15 中已被棄用。另外，我認為 UIButton.Configuration 中缺少一些東西影像將到達按鈕的右邊緣，但我不確定它是什么。

請讓我知道是否需要任何其他資訊。
提前致謝！

uj5u.com熱心網友回復：

通過將一些舊式按鈕代碼與新式混合使用，您可能會遇到問題，但是.......configuration

更改此行setupGeneralSettings()：

    button.contentHorizontalAlignment = .left

對此：

    button.contentHorizontalAlignment = .fill

看看你是否得到了想要的布局。

uj5u.com熱心網友回復：

您可以像這樣添加外部影像：

在您的控制器類下，宣告您的物件：

let btnDropdown = UIButton()
let myImageView = UIImageView()

在 viewDidLoad（或函式中）設定物件屬性和約束：

    myImageView.image = UIImage(systemName: "arrowtriangle.down.circle")
    myImageView.tintColor = .systemBlue
    myImageView.contentMode = .scaleAspectFit
    myImageView.clipsToBounds = true
    myImageView.translatesAutoresizingMaskIntoConstraints = false
    
    btnDropdown.contentHorizontalAlignment = .left
    btnDropdown.setTitle("Select Tags", for: .normal)
    btnDropdown.layer.borderWidth = 1
    btnDropdown.layer.borderColor = UIColor.black.cgColor // here set your border color
    btnDropdown.layer.cornerRadius = 8
    btnDropdown.clipsToBounds = true
    btnDropdown.setTitleColor(UIColor.black, for: .normal)
    btnDropdown.translatesAutoresizingMaskIntoConstraints = false
    btnDropdown.configuration = UIButton.Configuration.filled()
    btnDropdown.configuration?.background.backgroundColor = .lightGray.withAlphaComponent(0.3)
    btnDropdown.configuration?.titleTextAttributesTransformer = UIConfigurationTextAttributesTransformer { incoming in
      var outgoing = incoming
      outgoing.font = UIFont.systemFont(ofSize: 14, weight: .medium)
      return outgoing
     }

    view.addSubview(btnDropdown)
    NSLayoutConstraint.activate([
        btnDropdown.heightAnchor.constraint(equalToConstant: 44),
        btnDropdown.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 20),
        btnDropdown.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -20),
        btnDropdown.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 30)
    ])
    
    view.addSubview(myImageView)
    NSLayoutConstraint.activate([
        myImageView.trailingAnchor.constraint(equalTo: btnDropdown.trailingAnchor, constant: -8),
        myImageView.topAnchor.constraint(equalTo: btnDropdown.topAnchor, constant: 8),
        myImageView.bottomAnchor.constraint(equalTo: btnDropdown.bottomAnchor, constant: -8),
        myImageView.widthAnchor.constraint(equalToConstant: 28) // 28 is the result of difference from 44 (the height of button) and the sum of padding top   padding bottom (8   8): 44 - 16 = 28
    ])

這是結果：

標籤：IOS迅速用户界面按钮ios15

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