添加DispatchQueue.main.async{}块来确保在主线程上更新UI。示例代码：

func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) { print("getCurrentTimelineEntry") let now = Date() let entry = getTimelineEntry(for: complication, date: now) handler(entry) }

func getTimelineEntry(for complication: CLKComplication, date: Date) -> CLKComplicationTimelineEntry { let template = complication.template // Customize the template to display relevant information for the date. template.textProvider = CLKSimpleTextProvider(text: "Hello World") // Call the reloadTimeline(for:) method for a complication on demand. DispatchQueue.main.async { // Add this block to update UI complication.reloadTimeline(for: complication) } return CLKComplicationTimelineEntry(date: date, complicationTemplate: template) }