使用CLKTextProvider.localizableTextProvider（withStringsFileFormatKey：，textProviders :)组成文本提供程序

Question

是否有使用localizableTextProvider（withStringsFileFormatKey：，textProviders :)设置复杂功能的官方示例？我可以在生成SampleTemplate时填充文本提供程序，但每当我尝试使用getTimelineEntries生成一个由localizableTextProvider生成的文本提供程序时，结果总是空白，没有文本。

示例（仅支持.utilitarianLarge）：

func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) {  
    // Call the handler with the current timeline entry  
    let template = CLKComplicationTemplateUtilitarianLargeFlat()  

    template.textProvider = CLKTextProvider.localizableTextProvider(  
        withStringsFileFormatKey: "testComplication",  
        textProviders: [  
            CLKSimpleTextProvider(text: "Hello"),  
            CLKSimpleTextProvider(text: "World")  
        ]  
    )  

    handler(CLKComplicationTimelineEntry(date: Date(), complicationTemplate: template))  

}  

和sampleTemplate一样

func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) {  
    // This method will be called once per supported complication, and the results will be cached  
    switch complication.family {  
    case .utilitarianLarge:  
        let template = CLKComplicationTemplateUtilitarianLargeFlat()  

        template.textProvider = CLKTextProvider.localizableTextProvider(  
            withStringsFileFormatKey: "testComplication",  
            textProviders: [  
                CLKSimpleTextProvider(text: "Hi"),  
                CLKSimpleTextProvider(text: "World")  
            ]  
        )  

        handler(template)  

    default:  
        handler(nil)  
    }  

}  

用ckcomplication.strings作为

"testComplication" = "%@ %@";

样本模板将始终显示文本“Hi World”，而getCurrentTimelineEntry的结果将始终显示空复杂。

有没有人以这种方式组成文本提供者？

Answer 1

看来这个API在Swift中被破坏了（截至4.2）。我使用Objective C类别解决了这个问题。从here公然被盗

CLKTextProvider + NNNCompoundTextProviding.h

@interface CLKTextProvider (NNNCompoundTextProviding)

+ (nonnull CLKTextProvider *)nnn_textProviderByJoiningProvider:(nonnull CLKTextProvider *)provider1 andProvider:(nonnull CLKTextProvider *)provider2 withString:(nullable NSString *)joinString;

@end

CLKTextProvider + NNNCompoundTextProviding.m

@implementation CLKTextProvider (NNNCompoundTextProviding)

+ (nonnull CLKTextProvider *)nnn_textProviderByJoiningProvider:(nonnull CLKTextProvider *)provider1 andProvider:(nonnull CLKTextProvider *)provider2 withString:(nullable NSString *)joinString
{
    NSString *textProviderToken = @"%@";

    NSString *formatString;

    if (joinString != nil) {
        formatString = [NSString stringWithFormat:@"%@%@%@",
                        textProviderToken,
                        joinString,
                        textProviderToken];
    }
    else {
        formatString = [NSString stringWithFormat:@"%@%@",
                        textProviderToken,
                        textProviderToken];
    }

    return [self textProviderWithFormat:formatString, provider1, provider2];
}

@end