JCDownloader

JCNetworking.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'JCNetworking'
-  s.version      = '0.0.1'
+  s.version      = '0.0.2'
   s.license      = 'MIT'
   s.summary      = 'A useful iOS networking framework based on AFNetworking and JSONModel.'
   s.homepage     = 'https://github.com/boych/JCNetworking'
@@ -10,6 +10,10 @@ Pod::Spec.new do |s|
   s.platform     = :ios, '7.0'
   s.requires_arc = true
 
+  s.subspec "JCDownloader" do |ss|
+    ss.source_files = "JCNetworking/JCDownloader/*.{h,m}"
+  end
+
   s.dependency 'AFNetworking', '~> 3.1.0'
   s.dependency 'JSONModel', '~> 1.2.0'
 

JCNetworking.xcodeproj/project.pbxproj

@@ -8,8 +8,6 @@
 
 /* Begin PBXBuildFile section */
 		05A926779BF40BBF06BBF14A /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 580BE4179B4567E57A50E8F8 /* libPods.a */; };
-		0F6FEF3D1CF2DCD80023D04E /* JCDownloadQueue.m in Sources */ = {isa = PBXBuildFile; fileRef = 0F6FEF3C1CF2DCD80023D04E /* JCDownloadQueue.m */; };
-		0F6FEF411CF306890023D04E /* JCDownloadUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = 0F6FEF401CF306890023D04E /* JCDownloadUtilities.m */; };
 		0FC2D0F11D0659C600C6FAA2 /* JCNetworkReachabilityManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 0FC2D0F01D0659C600C6FAA2 /* JCNetworkReachabilityManager.m */; };
 		0FF08B8C1CD9D67900B6C820 /* JCBaseRequest.m in Sources */ = {isa = PBXBuildFile; fileRef = 0FF08B8B1CD9D67900B6C820 /* JCBaseRequest.m */; };
 		0FF08B951CD9ED4200B6C820 /* JCNetworkManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 0FF08B941CD9ED4200B6C820 /* JCNetworkManager.m */; };
@@ -20,19 +18,16 @@
 		230C432A1C8C0315002D6D52 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 230C43291C8C0315002D6D52 /* Assets.xcassets */; };
 		230C432D1C8C0315002D6D52 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 230C432B1C8C0315002D6D52 /* LaunchScreen.storyboard */; };
 		232DD32D1D05B9E300D820BF /* JCWeixinSSOManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 232DD32C1D05B9E300D820BF /* JCWeixinSSOManager.m */; };
+		236334B31D090712001932B9 /* JCDownloadAgent.m in Sources */ = {isa = PBXBuildFile; fileRef = 236334AB1D090712001932B9 /* JCDownloadAgent.m */; };
+		236334B41D090712001932B9 /* JCDownloadOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = 236334AD1D090712001932B9 /* JCDownloadOperation.m */; };
+		236334B51D090712001932B9 /* JCDownloadQueue.m in Sources */ = {isa = PBXBuildFile; fileRef = 236334B01D090712001932B9 /* JCDownloadQueue.m */; };
+		236334B61D090712001932B9 /* JCDownloadUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = 236334B21D090712001932B9 /* JCDownloadUtilities.m */; };
 		2394E7441D025E02002A200F /* JCLargeFileDownloadViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 2394E73E1D025E02002A200F /* JCLargeFileDownloadViewController.m */; };
 		2394E7451D025E02002A200F /* JCTImageDownloadCell.m in Sources */ = {isa = PBXBuildFile; fileRef = 2394E7401D025E02002A200F /* JCTImageDownloadCell.m */; };
 		2394E7461D025E02002A200F /* JCTImageDownloadItem.m in Sources */ = {isa = PBXBuildFile; fileRef = 2394E7421D025E02002A200F /* JCTImageDownloadItem.m */; };
-		23FC0C7E1CEFF014005C9949 /* JCDownloadOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = 23FC0C7D1CEFF014005C9949 /* JCDownloadOperation.m */; };
-		23FC0C811CEFF11F005C9949 /* JCDownloadAgent.m in Sources */ = {isa = PBXBuildFile; fileRef = 23FC0C801CEFF11F005C9949 /* JCDownloadAgent.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
-		0F6FEF3B1CF2DCD80023D04E /* JCDownloadQueue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadQueue.h; sourceTree = "<group>"; };
-		0F6FEF3C1CF2DCD80023D04E /* JCDownloadQueue.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadQueue.m; sourceTree = "<group>"; };
-		0F6FEF3E1CF2F4780023D04E /* JCDownloadOperationProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadOperationProtocol.h; sourceTree = "<group>"; };
-		0F6FEF3F1CF306890023D04E /* JCDownloadUtilities.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadUtilities.h; sourceTree = "<group>"; };
-		0F6FEF401CF306890023D04E /* JCDownloadUtilities.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadUtilities.m; sourceTree = "<group>"; };
 		0FBFB0321C1BCC0400B5A45D /* JCNetworking.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = JCNetworking.h; sourceTree = "<group>"; };
 		0FC2D0EF1D0659C600C6FAA2 /* JCNetworkReachabilityManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCNetworkReachabilityManager.h; sourceTree = "<group>"; };
 		0FC2D0F01D0659C600C6FAA2 /* JCNetworkReachabilityManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCNetworkReachabilityManager.m; sourceTree = "<group>"; };
@@ -52,17 +47,23 @@
 		230C432E1C8C0315002D6D52 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		232DD32B1D05B9E300D820BF /* JCWeixinSSOManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCWeixinSSOManager.h; sourceTree = "<group>"; };
 		232DD32C1D05B9E300D820BF /* JCWeixinSSOManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCWeixinSSOManager.m; sourceTree = "<group>"; };
+		236334AA1D090712001932B9 /* JCDownloadAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadAgent.h; sourceTree = "<group>"; };
+		236334AB1D090712001932B9 /* JCDownloadAgent.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadAgent.m; sourceTree = "<group>"; };
+		236334AC1D090712001932B9 /* JCDownloadOperation.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadOperation.h; sourceTree = "<group>"; };
+		236334AD1D090712001932B9 /* JCDownloadOperation.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadOperation.m; sourceTree = "<group>"; };
+		236334AE1D090712001932B9 /* JCDownloadOperationProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadOperationProtocol.h; sourceTree = "<group>"; };
+		236334AF1D090712001932B9 /* JCDownloadQueue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadQueue.h; sourceTree = "<group>"; };
+		236334B01D090712001932B9 /* JCDownloadQueue.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadQueue.m; sourceTree = "<group>"; };
+		236334B11D090712001932B9 /* JCDownloadUtilities.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadUtilities.h; sourceTree = "<group>"; };
+		236334B21D090712001932B9 /* JCDownloadUtilities.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadUtilities.m; sourceTree = "<group>"; };
+		236334B71D09075B001932B9 /* JCDownloader.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = JCDownloader.h; sourceTree = "<group>"; };
 		2394E73D1D025E02002A200F /* JCLargeFileDownloadViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCLargeFileDownloadViewController.h; sourceTree = "<group>"; };
 		2394E73E1D025E02002A200F /* JCLargeFileDownloadViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCLargeFileDownloadViewController.m; sourceTree = "<group>"; };
 		2394E73F1D025E02002A200F /* JCTImageDownloadCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCTImageDownloadCell.h; sourceTree = "<group>"; };
 		2394E7401D025E02002A200F /* JCTImageDownloadCell.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCTImageDownloadCell.m; sourceTree = "<group>"; };
 		2394E7411D025E02002A200F /* JCTImageDownloadItem.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCTImageDownloadItem.h; sourceTree = "<group>"; };
 		2394E7421D025E02002A200F /* JCTImageDownloadItem.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCTImageDownloadItem.m; sourceTree = "<group>"; };
 		23E991CC1CF1581C009C8917 /* JCNetworkingDemo-prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "JCNetworkingDemo-prefix.pch"; sourceTree = "<group>"; };
-		23FC0C7C1CEFF014005C9949 /* JCDownloadOperation.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadOperation.h; sourceTree = "<group>"; };
-		23FC0C7D1CEFF014005C9949 /* JCDownloadOperation.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadOperation.m; sourceTree = "<group>"; };
-		23FC0C7F1CEFF11F005C9949 /* JCDownloadAgent.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JCDownloadAgent.h; sourceTree = "<group>"; };
-		23FC0C801CEFF11F005C9949 /* JCDownloadAgent.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = JCDownloadAgent.m; sourceTree = "<group>"; };
 		355581728A723726D3274AA6 /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
 		580BE4179B4567E57A50E8F8 /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		C3A222EB81FBEBD593981CC6 /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
@@ -109,15 +110,7 @@
 				0FF08B941CD9ED4200B6C820 /* JCNetworkManager.m */,
 				0FC2D0EF1D0659C600C6FAA2 /* JCNetworkReachabilityManager.h */,
 				0FC2D0F01D0659C600C6FAA2 /* JCNetworkReachabilityManager.m */,
-				23FC0C7C1CEFF014005C9949 /* JCDownloadOperation.h */,
-				23FC0C7D1CEFF014005C9949 /* JCDownloadOperation.m */,
-				0F6FEF3E1CF2F4780023D04E /* JCDownloadOperationProtocol.h */,
-				0F6FEF3B1CF2DCD80023D04E /* JCDownloadQueue.h */,
-				0F6FEF3C1CF2DCD80023D04E /* JCDownloadQueue.m */,
-				23FC0C7F1CEFF11F005C9949 /* JCDownloadAgent.h */,
-				23FC0C801CEFF11F005C9949 /* JCDownloadAgent.m */,
-				0F6FEF3F1CF306890023D04E /* JCDownloadUtilities.h */,
-				0F6FEF401CF306890023D04E /* JCDownloadUtilities.m */,
+				236334A91D090712001932B9 /* JCDownloader */,
 			);
 			path = JCNetworking;
 			sourceTree = "<group>";
@@ -156,6 +149,23 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
+		236334A91D090712001932B9 /* JCDownloader */ = {
+			isa = PBXGroup;
+			children = (
+				236334B71D09075B001932B9 /* JCDownloader.h */,
+				236334AA1D090712001932B9 /* JCDownloadAgent.h */,
+				236334AB1D090712001932B9 /* JCDownloadAgent.m */,
+				236334AC1D090712001932B9 /* JCDownloadOperation.h */,
+				236334AD1D090712001932B9 /* JCDownloadOperation.m */,
+				236334AE1D090712001932B9 /* JCDownloadOperationProtocol.h */,
+				236334AF1D090712001932B9 /* JCDownloadQueue.h */,
+				236334B01D090712001932B9 /* JCDownloadQueue.m */,
+				236334B11D090712001932B9 /* JCDownloadUtilities.h */,
+				236334B21D090712001932B9 /* JCDownloadUtilities.m */,
+			);
+			path = JCDownloader;
+			sourceTree = "<group>";
+		};
 		2394E73A1D025E02002A200F /* Classes */ = {
 			isa = PBXGroup;
 			children = (
@@ -302,20 +312,20 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				23FC0C7E1CEFF014005C9949 /* JCDownloadOperation.m in Sources */,
 				230C43251C8C0315002D6D52 /* ViewController.m in Sources */,
 				230C43221C8C0315002D6D52 /* AppDelegate.m in Sources */,
 				2394E7451D025E02002A200F /* JCTImageDownloadCell.m in Sources */,
 				0FC2D0F11D0659C600C6FAA2 /* JCNetworkReachabilityManager.m in Sources */,
 				232DD32D1D05B9E300D820BF /* JCWeixinSSOManager.m in Sources */,
 				0FF08B951CD9ED4200B6C820 /* JCNetworkManager.m in Sources */,
-				0F6FEF3D1CF2DCD80023D04E /* JCDownloadQueue.m in Sources */,
 				2394E7461D025E02002A200F /* JCTImageDownloadItem.m in Sources */,
 				2394E7441D025E02002A200F /* JCLargeFileDownloadViewController.m in Sources */,
 				230C431F1C8C0315002D6D52 /* main.m in Sources */,
-				23FC0C811CEFF11F005C9949 /* JCDownloadAgent.m in Sources */,
-				0F6FEF411CF306890023D04E /* JCDownloadUtilities.m in Sources */,
+				236334B31D090712001932B9 /* JCDownloadAgent.m in Sources */,
+				236334B41D090712001932B9 /* JCDownloadOperation.m in Sources */,
+				236334B51D090712001932B9 /* JCDownloadQueue.m in Sources */,
 				0FF08B8C1CD9D67900B6C820 /* JCBaseRequest.m in Sources */,
+				236334B61D090712001932B9 /* JCDownloadUtilities.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

JCNetworking/JCDownloadOperation.h → JCNetworking/JCDownloader/JCDownloadOperation.h

@@ -20,10 +20,10 @@ typedef NS_ENUM(NSInteger, JCDownloadStatus) {
 /** 下载相关数据 */
 @interface JCDownloadItem : NSObject
 
-@property (nonatomic, strong) NSString *downloadUrl;      //下载链接地址
-@property (nonatomic, strong) NSString *downloadFilePath; //下载文件本地路径
+@property (nonatomic, strong) NSString *downloadUrl;      //下载链接地址，不能为空
+@property (nonatomic, strong) NSString *downloadFilePath; //下载文件本地路径，不能为空
 @property (nonatomic, strong) NSString *downloadId;       //下载唯一标识，为空时自动生成
-@property (nonatomic, strong) NSString *groupId;          //下载分组标识，可选
+@property (nonatomic, strong) NSString *groupId;          //下载分组标识
 @property (nonatomic, assign) JCDownloadStatus status;    //下载状态
 @property (nonatomic, assign) int64_t totalUnitCount;     //下载文件总大小
 @property (nonatomic, assign) int64_t completedUnitCount; //已下载文件大小
@@ -45,11 +45,13 @@ typedef void(^JCDownloadCompletionBlock)(NSURL *filePath, NSError *error);
 /** 文件下载类 */
 @interface JCDownloadOperation : NSObject
 
-@property (nonatomic, strong) JCDownloadItem *item;
-
+@property (nonatomic, strong, readonly) JCDownloadItem *item;
 @property (nonatomic, copy, readonly) JCDownloadProgressBlock progressBlock;
 @property (nonatomic, copy, readonly) JCDownloadCompletionBlock completionBlock;
 
+/** 实例化对象 */
++ (instancetype)operationWithItem:(JCDownloadItem *)item;
+
 /** 开始下载 */
 - (void)startDownload;
 

JCNetworking/JCDownloadOperation.m → JCNetworking/JCDownloader/JCDownloadOperation.m

@@ -31,6 +31,7 @@ - (NSString *)downloadId
 
 @interface JCDownloadOperation ()
 
+@property (nonatomic, strong) JCDownloadItem *item;
 @property (nonatomic, copy) JCDownloadProgressBlock progressBlock;
 @property (nonatomic, copy) JCDownloadCompletionBlock completionBlock;
 
@@ -43,6 +44,24 @@ - (void)dealloc
     [self clearBlocks];
 }
 
+- (instancetype)initWithItem:(JCDownloadItem *)item
+{
+    if (self = [super init]) {
+        _item = item;
+    }
+    return self;
+}
+
++ (instancetype)operationWithItem:(JCDownloadItem *)item
+{
+    JCDownloadOperation *operation = [[JCDownloadQueue sharedQueue] downloadOperation:item.downloadId
+                                                                              groupId:item.groupId];
+    if (operation) {
+        return operation;
+    }
+    return [[self alloc] initWithItem:item];
+}
+
 - (void)startDownload
 {
     [[JCDownloadQueue sharedQueue] startDownload:self];
@@ -51,7 +70,8 @@ - (void)startDownload
 - (void)startWithProgressBlock:(JCDownloadProgressBlock)progressBlock
                completionBlock:(JCDownloadCompletionBlock)completionBlock
 {
-    [self resetProgressBlock:progressBlock completionBlock:completionBlock];
+    [self resetProgressBlock:progressBlock
+             completionBlock:completionBlock];
     [self startDownload];
 }
 

JCNetworking/JCDownloader/JCDownloader.h

@@ -0,0 +1,18 @@
+//
+//  JCDownloader.h
+//  JCNetworking
+//
+//  Created by ChenJianjun on 16/6/9.
+//  Copyright © 2016年 JC. All rights reserved.
+//
+
+#ifndef JCDownloader_h
+#define JCDownloader_h
+
+#import "JCDownloadOperation.h"
+#import "JCDownloadOperationProtocol.h"
+#import "JCDownloadQueue.h"
+#import "JCDownloadAgent.h"
+#import "JCDownloadUtilities.h"
+
+#endif /* JCDownloader_h */

JCNetworking/JCNetworking.h

@@ -8,12 +8,13 @@
 
 #import <Foundation/Foundation.h>
 
+#ifndef JCNetworking_h
+#define JCNetworking_h
+
 #import "JCBaseRequest.h"
 #import "JCNetworkManager.h"
 #import "JCNetworkReachabilityManager.h"
 
-#import "JCDownloadOperation.h"
-#import "JCDownloadOperationProtocol.h"
-#import "JCDownloadQueue.h"
-#import "JCDownloadAgent.h"
-#import "JCDownloadUtilities.h"
+#import "JCDownloader.h"
+
+#endif /* JCNetworking_h */

JCNetworkingDemo/Classes/JCLargeFileDownloadViewController.m

@@ -107,23 +107,17 @@ - (void)initDownloadData
     downloadItem.groupId = @"largeFileDownloadGroupId";
     downloadItem.downloadUrl = @"http://dldir1.qq.com/qqfile/QQforMac/QQ_V4.0.6.dmg";
     downloadItem.downloadFilePath = [JCDownloadUtilities filePathWithFileName:[downloadItem.downloadUrl lastPathComponent] folderName:@"downloadFiles"];
-    JCDownloadOperation *operation = [[JCDownloadQueue sharedQueue] downloadOperation:downloadItem.downloadId groupId:downloadItem.groupId];
-    if (operation) {
-        self.downloadOperation = operation;
-        @weakify(self);
-        [self.downloadOperation resetProgressBlock:^(NSProgress *progress) {
-            @strongify(self);
-            [self resetProgressWithCompletedUnitCount:progress.completedUnitCount
-                                       totalUnitCount:progress.totalUnitCount];
-        } completionBlock:^(NSURL *filePath, NSError *error) {
-            @strongify(self);
-            [self resetProgressWithCompletedUnitCount:self.downloadOperation.item.completedUnitCount
-                                       totalUnitCount:self.downloadOperation.item.totalUnitCount];
-        }];
-    } else {
-        self.downloadOperation = [[JCDownloadOperation alloc] init];
-        self.downloadOperation.item = downloadItem;
-    }
+    self.downloadOperation = [JCDownloadOperation operationWithItem:downloadItem];
+    @weakify(self);
+    [self.downloadOperation resetProgressBlock:^(NSProgress *progress) {
+        @strongify(self);
+        [self resetProgressWithCompletedUnitCount:progress.completedUnitCount
+                                   totalUnitCount:progress.totalUnitCount];
+    } completionBlock:^(NSURL *filePath, NSError *error) {
+        @strongify(self);
+        [self resetProgressWithCompletedUnitCount:self.downloadOperation.item.completedUnitCount
+                                   totalUnitCount:self.downloadOperation.item.totalUnitCount];
+    }];
     [self downloadStatusChanged:self.downloadOperation.item.status];
     [self resetProgressWithCompletedUnitCount:self.downloadOperation.item.completedUnitCount
                                totalUnitCount:self.downloadOperation.item.totalUnitCount];

JCNetworkingDemo/ViewController.m

@@ -145,8 +145,7 @@ - (void)startDownload
             item.groupId = JCTImageDownloadGroupId;
             item.downloadUrl = [self urlList][index];
             item.downloadFilePath = [JCDownloadUtilities filePathWithFileName:[item.downloadUrl lastPathComponent] folderName:@"downloadImages"];
-            JCDownloadOperation *operation = [[JCDownloadOperation alloc] init];
-            operation.item = item;
+            JCDownloadOperation *operation = [JCDownloadOperation operationWithItem:item];
             [downloadList addObject:operation];
         }
         [[JCDownloadQueue sharedQueue] startDownloadList:downloadList];