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/SDWebImageDownloader.h | 271 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 271 insertions(+), 0 deletions(-)
diff --git a/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImageDownloader.h b/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImageDownloader.h
new file mode 100644
index 0000000..b5911af
--- /dev/null
+++ b/screendisplay/Pods/SDWebImage/SDWebImage/SDWebImageDownloader.h
@@ -0,0 +1,271 @@
+/*
+ * 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 "SDWebImageCompat.h"
+#import "SDWebImageOperation.h"
+
+typedef NS_OPTIONS(NSUInteger, SDWebImageDownloaderOptions) {
+ /**
+ * Put the download in the low queue priority and task priority.
+ */
+ SDWebImageDownloaderLowPriority = 1 << 0,
+
+ /**
+ * This flag enables progressive download, the image is displayed progressively during download as a browser would do.
+ */
+ SDWebImageDownloaderProgressiveDownload = 1 << 1,
+
+ /**
+ * By default, request prevent the use of NSURLCache. With this flag, NSURLCache
+ * is used with default policies.
+ */
+ SDWebImageDownloaderUseNSURLCache = 1 << 2,
+
+ /**
+ * Call completion block with nil image/imageData if the image was read from NSURLCache
+ * (to be combined with `SDWebImageDownloaderUseNSURLCache`).
+ */
+ SDWebImageDownloaderIgnoreCachedResponse = 1 << 3,
+
+ /**
+ * In iOS 4+, continue the download of the image if the app goes to background. This is achieved by asking the system for
+ * extra time in background to let the request finish. If the background task expires the operation will be cancelled.
+ */
+ SDWebImageDownloaderContinueInBackground = 1 << 4,
+
+ /**
+ * Handles cookies stored in NSHTTPCookieStore by setting
+ * NSMutableURLRequest.HTTPShouldHandleCookies = YES;
+ */
+ SDWebImageDownloaderHandleCookies = 1 << 5,
+
+ /**
+ * Enable to allow untrusted SSL certificates.
+ * Useful for testing purposes. Use with caution in production.
+ */
+ SDWebImageDownloaderAllowInvalidSSLCertificates = 1 << 6,
+
+ /**
+ * Put the download in the high queue priority and task priority.
+ */
+ SDWebImageDownloaderHighPriority = 1 << 7,
+
+ /**
+ * Scale down the image
+ */
+ SDWebImageDownloaderScaleDownLargeImages = 1 << 8,
+};
+
+typedef NS_ENUM(NSInteger, SDWebImageDownloaderExecutionOrder) {
+ /**
+ * Default value. All download operations will execute in queue style (first-in-first-out).
+ */
+ SDWebImageDownloaderFIFOExecutionOrder,
+
+ /**
+ * All download operations will execute in stack style (last-in-first-out).
+ */
+ SDWebImageDownloaderLIFOExecutionOrder
+};
+
+FOUNDATION_EXPORT NSString * _Nonnull const SDWebImageDownloadStartNotification;
+FOUNDATION_EXPORT NSString * _Nonnull const SDWebImageDownloadStopNotification;
+
+typedef void(^SDWebImageDownloaderProgressBlock)(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL);
+
+typedef void(^SDWebImageDownloaderCompletedBlock)(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, BOOL finished);
+
+typedef NSDictionary<NSString *, NSString *> SDHTTPHeadersDictionary;
+typedef NSMutableDictionary<NSString *, NSString *> SDHTTPHeadersMutableDictionary;
+
+typedef SDHTTPHeadersDictionary * _Nullable (^SDWebImageDownloaderHeadersFilterBlock)(NSURL * _Nullable url, SDHTTPHeadersDictionary * _Nullable headers);
+
+/**
+ * A token associated with each download. Can be used to cancel a download
+ */
+@interface SDWebImageDownloadToken : NSObject <SDWebImageOperation>
+
+/**
+ The download's URL. This should be readonly and you should not modify
+ */
+@property (nonatomic, strong, nullable) NSURL *url;
+/**
+ The cancel token taken from `addHandlersForProgress:completed`. This should be readonly and you should not modify
+ @note use `-[SDWebImageDownloadToken cancel]` to cancel the token
+ */
+@property (nonatomic, strong, nullable) id downloadOperationCancelToken;
+
+@end
+
+
+/**
+ * Asynchronous downloader dedicated and optimized for image loading.
+ */
+@interface SDWebImageDownloader : NSObject
+
+/**
+ * Decompressing images that are downloaded and cached can improve performance but can consume lot of memory.
+ * Defaults to YES. Set this to NO if you are experiencing a crash due to excessive memory consumption.
+ */
+@property (assign, nonatomic) BOOL shouldDecompressImages;
+
+/**
+ * The maximum number of concurrent downloads
+ */
+@property (assign, nonatomic) NSInteger maxConcurrentDownloads;
+
+/**
+ * Shows the current amount of downloads that still need to be downloaded
+ */
+@property (readonly, nonatomic) NSUInteger currentDownloadCount;
+
+/**
+ * The timeout value (in seconds) for the download operation. Default: 15.0.
+ */
+@property (assign, nonatomic) NSTimeInterval downloadTimeout;
+
+/**
+ * The configuration in use by the internal NSURLSession.
+ * Mutating this object directly has no effect.
+ *
+ * @see createNewSessionWithConfiguration:
+ */
+@property (readonly, nonatomic, nonnull) NSURLSessionConfiguration *sessionConfiguration;
+
+
+/**
+ * Changes download operations execution order. Default value is `SDWebImageDownloaderFIFOExecutionOrder`.
+ */
+@property (assign, nonatomic) SDWebImageDownloaderExecutionOrder executionOrder;
+
+/**
+ * Singleton method, returns the shared instance
+ *
+ * @return global shared instance of downloader class
+ */
++ (nonnull instancetype)sharedDownloader;
+
+/**
+ * Set the default URL credential to be set for request operations.
+ */
+@property (strong, nonatomic, nullable) NSURLCredential *urlCredential;
+
+/**
+ * Set username
+ */
+@property (strong, nonatomic, nullable) NSString *username;
+
+/**
+ * Set password
+ */
+@property (strong, nonatomic, nullable) NSString *password;
+
+/**
+ * Set filter to pick headers for downloading image HTTP request.
+ *
+ * This block will be invoked for each downloading image request, returned
+ * NSDictionary will be used as headers in corresponding HTTP request.
+ */
+@property (nonatomic, copy, nullable) SDWebImageDownloaderHeadersFilterBlock headersFilter;
+
+/**
+ * Creates an instance of a downloader with specified session configuration.
+ * @note `timeoutIntervalForRequest` is going to be overwritten.
+ * @return new instance of downloader class
+ */
+- (nonnull instancetype)initWithSessionConfiguration:(nullable NSURLSessionConfiguration *)sessionConfiguration NS_DESIGNATED_INITIALIZER;
+
+/**
+ * Set a value for a HTTP header to be appended to each download HTTP request.
+ *
+ * @param value The value for the header field. Use `nil` value to remove the header.
+ * @param field The name of the header field to set.
+ */
+- (void)setValue:(nullable NSString *)value forHTTPHeaderField:(nullable NSString *)field;
+
+/**
+ * Returns the value of the specified HTTP header field.
+ *
+ * @return The value associated with the header field field, or `nil` if there is no corresponding header field.
+ */
+- (nullable NSString *)valueForHTTPHeaderField:(nullable NSString *)field;
+
+/**
+ * Sets a subclass of `SDWebImageDownloaderOperation` as the default
+ * `NSOperation` to be used each time SDWebImage constructs a request
+ * operation to download an image.
+ *
+ * @param operationClass The subclass of `SDWebImageDownloaderOperation` to set
+ * as default. Passing `nil` will revert to `SDWebImageDownloaderOperation`.
+ */
+- (void)setOperationClass:(nullable Class)operationClass;
+
+/**
+ * Creates a SDWebImageDownloader async downloader instance with a given URL
+ *
+ * The delegate will be informed when the image is finish downloaded or an error has happen.
+ *
+ * @see SDWebImageDownloaderDelegate
+ *
+ * @param url The URL to the image to download
+ * @param options The options to be used for this download
+ * @param progressBlock A block called repeatedly while the image is downloading
+ * @note the progress block is executed on a background queue
+ * @param completedBlock A block called once the download is completed.
+ * If the download succeeded, the image parameter is set, in case of error,
+ * error parameter is set with the error. The last parameter is always YES
+ * if SDWebImageDownloaderProgressiveDownload isn't use. With the
+ * SDWebImageDownloaderProgressiveDownload option, this block is called
+ * repeatedly with the partial image object and the finished argument set to NO
+ * before to be called a last time with the full image and finished argument
+ * set to YES. In case of error, the finished argument is always YES.
+ *
+ * @return A token (SDWebImageDownloadToken) that can be passed to -cancel: to cancel this operation
+ */
+- (nullable SDWebImageDownloadToken *)downloadImageWithURL:(nullable NSURL *)url
+ options:(SDWebImageDownloaderOptions)options
+ progress:(nullable SDWebImageDownloaderProgressBlock)progressBlock
+ completed:(nullable SDWebImageDownloaderCompletedBlock)completedBlock;
+
+/**
+ * Cancels a download that was previously queued using -downloadImageWithURL:options:progress:completed:
+ *
+ * @param token The token received from -downloadImageWithURL:options:progress:completed: that should be canceled.
+ */
+- (void)cancel:(nullable SDWebImageDownloadToken *)token;
+
+/**
+ * Sets the download queue suspension state
+ */
+- (void)setSuspended:(BOOL)suspended;
+
+/**
+ * Cancels all download operations in the queue
+ */
+- (void)cancelAllDownloads;
+
+/**
+ * Forces SDWebImageDownloader to create and use a new NSURLSession that is
+ * initialized with the given configuration.
+ * @note All existing download operations in the queue will be cancelled.
+ * @note `timeoutIntervalForRequest` is going to be overwritten.
+ *
+ * @param sessionConfiguration The configuration to use for the new NSURLSession
+ */
+- (void)createNewSessionWithConfiguration:(nonnull NSURLSessionConfiguration *)sessionConfiguration;
+
+/**
+ * Invalidates the managed session, optionally canceling pending operations.
+ * @note If you use custom downloader instead of the shared downloader, you need call this method when you do not use it to avoid memory leak
+ * @param cancelPendingOperations Whether or not to cancel pending operations.
+ * @note Calling this method on the shared downloader has no effect.
+ */
+- (void)invalidateSessionAndCancel:(BOOL)cancelPendingOperations;
+
+@end
--
Gitblit v1.8.0