From 7b02207537d35bfa1714bf8beafc921f717d100a Mon Sep 17 00:00:00 2001
From: 单军华
Date: Wed, 11 Jul 2018 10:47:42 +0800
Subject: [PATCH] 首次上传

---
 screendisplay/Pods/SDWebImage/SDWebImage/SDWebImagePrefetcher.h |  112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 112 insertions(+), 0 deletions(-)

diff --git a/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImagePrefetcher.h b/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImagePrefetcher.h
new file mode 100644
index 0000000..93357f4
--- /dev/null
+++ b/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImagePrefetcher.h
@@ -0,0 +1,112 @@
+/*
+ * This file is part of the SDWebImage package.
+ * (c) Olivier Poitrey <rs@dailymotion.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import <Foundation/Foundation.h>
+#import "SDWebImageManager.h"
+
+@class SDWebImagePrefetcher;
+
+@protocol SDWebImagePrefetcherDelegate <NSObject>
+
+@optional
+
+/**
+ * Called when an image was prefetched.
+ *
+ * @param imagePrefetcher The current image prefetcher
+ * @param imageURL        The image url that was prefetched
+ * @param finishedCount   The total number of images that were prefetched (successful or not)
+ * @param totalCount      The total number of images that were to be prefetched
+ */
+- (void)imagePrefetcher:(nonnull SDWebImagePrefetcher *)imagePrefetcher didPrefetchURL:(nullable NSURL *)imageURL finishedCount:(NSUInteger)finishedCount totalCount:(NSUInteger)totalCount;
+
+/**
+ * Called when all images are prefetched.
+ * @param imagePrefetcher The current image prefetcher
+ * @param totalCount      The total number of images that were prefetched (whether successful or not)
+ * @param skippedCount    The total number of images that were skipped
+ */
+- (void)imagePrefetcher:(nonnull SDWebImagePrefetcher *)imagePrefetcher didFinishWithTotalCount:(NSUInteger)totalCount skippedCount:(NSUInteger)skippedCount;
+
+@end
+
+typedef void(^SDWebImagePrefetcherProgressBlock)(NSUInteger noOfFinishedUrls, NSUInteger noOfTotalUrls);
+typedef void(^SDWebImagePrefetcherCompletionBlock)(NSUInteger noOfFinishedUrls, NSUInteger noOfSkippedUrls);
+
+/**
+ * Prefetch some URLs in the cache for future use. Images are downloaded in low priority.
+ */
+@interface SDWebImagePrefetcher : NSObject
+
+/**
+ *  The web image manager
+ */
+@property (strong, nonatomic, readonly, nonnull) SDWebImageManager *manager;
+
+/**
+ * Maximum number of URLs to prefetch at the same time. Defaults to 3.
+ */
+@property (nonatomic, assign) NSUInteger maxConcurrentDownloads;
+
+/**
+ * SDWebImageOptions for prefetcher. Defaults to SDWebImageLowPriority.
+ */
+@property (nonatomic, assign) SDWebImageOptions options;
+
+/**
+ * Queue options for Prefetcher. Defaults to Main Queue.
+ */
+@property (strong, nonatomic, nonnull) dispatch_queue_t prefetcherQueue;
+
+@property (weak, nonatomic, nullable) id <SDWebImagePrefetcherDelegate> delegate;
+
+/**
+ * Return the global image prefetcher instance.
+ */
++ (nonnull instancetype)sharedImagePrefetcher;
+
+/**
+ * Allows you to instantiate a prefetcher with any arbitrary image manager.
+ */
+- (nonnull instancetype)initWithImageManager:(nonnull SDWebImageManager *)manager NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Assign list of URLs to let SDWebImagePrefetcher to queue the prefetching,
+ * currently one image is downloaded at a time,
+ * and skips images for failed downloads and proceed to the next image in the list.
+ * Any previously-running prefetch operations are canceled.
+ *
+ * @param urls list of URLs to prefetch
+ */
+- (void)prefetchURLs:(nullable NSArray<NSURL *> *)urls;
+
+/**
+ * Assign list of URLs to let SDWebImagePrefetcher to queue the prefetching,
+ * currently one image is downloaded at a time,
+ * and skips images for failed downloads and proceed to the next image in the list.
+ * Any previously-running prefetch operations are canceled.
+ *
+ * @param urls            list of URLs to prefetch
+ * @param progressBlock   block to be called when progress updates; 
+ *                        first parameter is the number of completed (successful or not) requests, 
+ *                        second parameter is the total number of images originally requested to be prefetched
+ * @param completionBlock block to be called when prefetching is completed
+ *                        first param is the number of completed (successful or not) requests,
+ *                        second parameter is the number of skipped requests
+ */
+- (void)prefetchURLs:(nullable NSArray<NSURL *> *)urls
+            progress:(nullable SDWebImagePrefetcherProgressBlock)progressBlock
+           completed:(nullable SDWebImagePrefetcherCompletionBlock)completionBlock;
+
+/**
+ * Remove and cancel queued list
+ */
+- (void)cancelPrefetching;
+
+
+@end

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