Swift Today Extension preferredContentSize 未调整大小

Question

就像描述中说的那样，我正在开发一个 iOS 应用程序，并想为其创建一个 Today Extension Widget。我的问题是我想将高度更改为 200。在研究之后，我发现唯一的解决方案是使用 preferredContentSize 属性，但这对我不起作用。

我想给它添加一个 table 视图，我希望它应该完全显示。我添加了 viewDidLoad 方法，这样您就可以看到 table 的创建和添加位置。

override func viewDidLoad() {
    super.viewDidLoad()

    let myDefaults = UserDefaults(suiteName: "group.com.iOSApp")!
    let eventData = myDefaults.object(forKey: "events")

    if eventData != nil {
        shownEvents = NSKeyedUnarchiver.unarchiveObject(with: eventData as! Data) as! [Event]
    }

    eventTable = UITableView()
    eventTable.register(TodayViewCell.self, forCellReuseIdentifier: "cell")
    eventTable.separatorColor = UIColor.primary()
    view.addSubview(eventTable)
    eventTable.translatesAutoresizingMaskIntoConstraints = false

    var tempX = NSLayoutConstraint(item: eventTable, attribute: .leading, relatedBy: NSLayoutRelation.equal, toItem: view, attribute: .leading, multiplier: 1, constant: 0)
    var tempY = NSLayoutConstraint(item: eventTable, attribute: .top, relatedBy: NSLayoutRelation.equal, toItem: view, attribute: .top, multiplier: 1, constant: 0) 
    NSLayoutConstraint.activate([tempX, tempY])

    tempX = NSLayoutConstraint(item: eventTable, attribute: .trailing, relatedBy: NSLayoutRelation.equal, toItem: view, attribute: .trailing, multiplier: 1, constant: 0)
    tempY = NSLayoutConstraint(item: eventTable, attribute: .bottom, relatedBy: NSLayoutRelation.equal, toItem: view, attribute: .bottom, multiplier: 1, constant: 0)   
    NSLayoutConstraint.activate([tempX, tempY])


    eventTable.delegate = self
    eventTable.dataSource = self

    eventTable.reloadData()

    preferredContentSize.height = 200


}

Answer 1

在iOS10设置preferredContentSize.height直接不行

在iOS10之后，有两种类型显示今天的延期

案例一显示更多（展开类型，可自定义高度）

case 2 Show Less (compact type, has default hegiht)

What's new in iOS 10

所以你应该为 iOS 10 个早期版本和 iOS 10

提供高度

if #available(iOSApplicationExtension 10.0, *) {
        //setup display mode (show more(.expended) or show less(.compact))
        extensionContext?.widgetLargestAvailableDisplayMode = .expanded
    } else {
        // Fallback on earlier versions
        preferredContentSize.height = 200
    }

并应实现自定义高度

func widgetActiveDisplayModeDidChange(_ activeDisplayMode: NCWidgetDisplayMode, withMaximumSize maxSize: CGSize) {

@available(iOSApplicationExtension 10.0, *)
func widgetActiveDisplayModeDidChange(_ activeDisplayMode: NCWidgetDisplayMode, withMaximumSize maxSize: CGSize) {
    switch activeDisplayMode {
    case .expanded: preferredContentSize.height = 200
    case .compact: preferredContentSize = maxSize
    }
}

Swift Today Extension preferredContentSize 未调整大小

Swift Today Extension preferredContentSize not resizing

ios

swift

today-extension