如何在 watchOS 复杂功能中显示图像

Question

我目前正在为我的 watchOS 2 应用设置复杂功能。

我想提供三种不同类型的并发症：

• 实用小
• 模块化小商品
• 圆形小

所有这些并发症类型都应该简单地将我的应用程序图标显示为图像。在我的 ClockKit 类中，我实现了以下方法：

func getCurrentTimelineEntryForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimelineEntry?) -> Void) {

    if complication.family == .CircularSmall {

        let template = CLKComplicationTemplateCircularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: NSDate(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .UtilitarianSmall{

        let template = CLKComplicationTemplateUtilitarianSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: NSDate(), complicationTemplate: template)
        handler(timelineEntry)

    } else if complication.family == .ModularSmall {

        let template = CLKComplicationTemplateModularSmallRingImage()
        template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
        let timelineEntry = CLKComplicationTimelineEntry(date: NSDate(), complicationTemplate: template)
        handler(timelineEntry)

    } else {

        handler(nil)

    }

}

我不确定这是实现我的想法的适当方式，所以我想知道仅显示图像作为我的复杂功能的代码。有谁知道我如何做到这一点？

Answer 1

首先，我强烈建议您观看有关并发症的Apple's session，除非您还没有看过。

您至少需要在您的ComplicationController 中实现以下3 个CLKComplicationDataSource 的非可选方法：

public func getSupportedTimeTravelDirectionsForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimeTravelDirections) -> Void)
public func getCurrentTimelineEntryForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimelineEntry?) -> Void)
public func getPlaceholderTemplateForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTemplate?) -> Void)

所有其他方法都是可选的。据你所见，你只实现了第二个。在您的上下文中，其余两个的实现可能如下：

class ComplicationController: NSObject, CLKComplicationDataSource {

    func getSupportedTimeTravelDirectionsForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimeTravelDirections) -> Void) { 
        // Turn off time travelling
        handler([CLKComplicationTimeTravelDirections.None])
    }

    func getPlaceholderTemplateForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTemplate?) -> Void) {
        var template: CLKComplicationTemplate?

        switch complication.family {
            case .CircularSmall:
                template = CLKComplicationTemplateCircularSmallRingImage()
                template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
            case .UtilitarianSmall:
                template = CLKComplicationTemplateUtilitarianSmallRingImage()
                template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
            case .ModularSmall:
                template = CLKComplicationTemplateModularSmallRingImage()
                template.imageProvider = CLKImageProvider(onePieceImage: UIImage(named: "app_icon")!)
            case .ModularLarge:
                template = nil
            case .UtilitarianLarge:
                template = nil
        }

        handler(template)
    }

}

不要忘记在复杂配置中将您的数据源类指定为$(PRODUCT_MODULE_NAME).ComplicationController 并选中相应的复选框。

这是您的情况下最小的复杂配置。