声明处： AFImageDownloader.h

AFImageDownloadPrioritization

定义

typedef NS_ENUM(NSInteger, AFImageDownloadPrioritization ) {   
AFImageDownloadPrioritizationFIFO,
AFImageDownloadPrioritizationLIFO,
};

常量

AFImageDownloadPrioritizationFIFO,
AFImageDownloadPrioritizationLIFO,

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