iOS开发必知：当登录页跳转首页时，5种传值方案如何选择？-嘻道妙招

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swift澶嶅埗// LoginViewController.swift
func loginSuccess() {
    let homeVC = HomeViewController()
    homeVC.userName = "iOS_Dev"
    homeVC.memberLevel = .vip
    navigationController?.pushViewController(homeVC, animated: true)
}

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swift澶嶅埗// OrderConfirmVC.swift
var addressUpdateHandler: ((String) -> Void)?

@objc func modifyAddress() {
    let addressVC = AddressSelectorVC()
    addressVC.onAddressSelected = { [weak self] newAddress in
        self?.currentAddressLabel.text = newAddress
        self?.addressUpdateHandler?(newAddress)
    }
    present(addressVC, animated: true)
}

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swift澶嶅埗protocol SettingsDelegate: AnyObject {
    func didUpdateFontSize(_ size: CGFloat)
    func didToggleDarkMode(_ isEnabled: Bool)
}

class FontSettingVC: UIViewController {
    weak var delegate: SettingsDelegate?
    
    @objc func sliderValueChanged(slider: UISlider) {
        delegate?.didUpdateFontSize(CGFloat(slider.value))
    }
}

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swift澶嶅埗// 涓婚绠＄悊涓績
NotificationCenter.default.post(
    name: .themeChanged,
    object: nil,
    userInfo: ["themeColor": UIColor.systemIndigo]
)

// 鍚勯〉闈㈢洃鍚?/span>
NotificationCenter.default.addObserver(
    self,
    selector: #selector(updateTheme(_:)),
    name: .themeChanged,
    object: nil
)

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swift澶嶅埗class CartManager {
    static let shared = CartManager()
    private init() {}
    
    var items: [CartItem] = []
    var totalPrice: Double {
        return items.reduce(0) { $0 + $1.price }
    }
}

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CartManager.shared.items.append(newItem)

// 璐墿杞﹂〉
func reloadCart() {
    tableView.reloadData()
    totalLabel.text = "楼\(CartManager.shared.totalPrice)"
}

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本文由嘻道妙招独家原创，未经允许，严禁转载

iOS开发必知：当登录页跳转首页时，5种传值方案如何选择？

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