diff --git a/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcuserdata/zhangdingwen.xcuserdatad/UserInterfaceState.xcuserstate b/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcuserdata/zhangdingwen.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..21e99a1
Binary files /dev/null and b/DEMO/DWCoreTextLabel.xcodeproj/project.xcworkspace/xcuserdata/zhangdingwen.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/DEMO/DWCoreTextLabel.xcodeproj/xcuserdata/zhangdingwen.xcuserdatad/xcschemes/xcschememanagement.plist b/DEMO/DWCoreTextLabel.xcodeproj/xcuserdata/zhangdingwen.xcuserdatad/xcschemes/xcschememanagement.plist
new file mode 100644
index 0000000..abb1938
--- /dev/null
+++ b/DEMO/DWCoreTextLabel.xcodeproj/xcuserdata/zhangdingwen.xcuserdatad/xcschemes/xcschememanagement.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>DWCoreTextLabel.xcscheme</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>
diff --git a/DWCoreTextLabel.podspec b/DWCoreTextLabel.podspec
index bf597de..7133fe2 100755
--- a/DWCoreTextLabel.podspec
+++ b/DWCoreTextLabel.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
 s.name = 'DWCoreTextLabel'
-s.version = '1.2.3'
+s.version = '1.2.4'
 s.license = { :type => 'MIT', :file => 'LICENSE' }
 s.summary = 'It is a Label based on coreText,help you to layout of the collocation of illustration and character.基于coreText的Label控件，帮助你做图文混排。'
 s.homepage = 'https://github.com/CodeWicky/DWCoreTextLabel'
diff --git a/DWCoreTextLabel/DWCoreTextLabel.h b/DWCoreTextLabel/DWCoreTextLabel.h
index d91ea2c..bf1f26b 100644
--- a/DWCoreTextLabel/DWCoreTextLabel.h
+++ b/DWCoreTextLabel/DWCoreTextLabel.h
@@ -155,6 +155,12 @@
  
  少数情况末尾省略号失效，尚未找到原因
  
+ version 1.2.3
+ 规范Block写法
+ 
+ version 1.2.4
+ 修改图片下载类
+ 
  */
 
 #import <UIKit/UIKit.h>
diff --git a/DWCoreTextLabel/DWWebImage.h b/DWCoreTextLabel/DWWebImage.h
index 1d32162..4b8544f 100644
--- a/DWCoreTextLabel/DWWebImage.h
+++ b/DWCoreTextLabel/DWWebImage.h
@@ -11,9 +11,16 @@
  轻量级图片异步下载缓存类
  
  version 1.0.0
- 提供异步下载功能，提供图片缓存功能，线程安全。
+ 提供异步下载功能，提供图片缓存功能。
+ 
+ version 1.0.1
+ 添加断言
+ 
+ version 1.0.2
+ 下载完成后修改operation为finish状态
  */
 
+
 #import <UIKit/UIKit.h>
 
 #ifndef DWWebImageMarco
@@ -124,8 +131,18 @@ typedef NS_ENUM(NSUInteger, DWWebImageCacheType) {///缓存数据类型
 ///现在完成标志
 @property (nonatomic ,assign) BOOL downloadFinish;
 
+///初始化方法
+-(instancetype)initWithSession:(NSURLSession *)session;
+
 ///以url下载图片
 -(void)downloadImageWithUrlString:(NSString *)url;
+
+///开启下载
+-(void)resume;
+
+///取消下载
+-(void)cancel;
+
 @end
 
 
@@ -136,6 +153,9 @@ typedef NS_ENUM(NSUInteger, DWWebImageCacheType) {///缓存数据类型
 ///图片下载器
 @property (nonatomic ,strong) DWWebImageDownloader * donwloader;
 
+///下载任务是否完成
+@property (nonatomic , assign, getter=isFinished) BOOL finished;
+
 ///以url及session下载图片
 -(instancetype)initWithUrl:(NSString *)url session:(NSURLSession *)session;
 
diff --git a/DWCoreTextLabel/DWWebImage.m b/DWCoreTextLabel/DWWebImage.m
index 53ba112..8fe5f2a 100644
--- a/DWCoreTextLabel/DWWebImage.m
+++ b/DWCoreTextLabel/DWWebImage.m
@@ -148,6 +148,10 @@ -(void)downloadFinishNotice:(NSNotification *)sender
     if (error) {///移除任务
         [self removeOperationByUrl:sender.userInfo[@"url"]];
         [self removeCacheByUrl:sender.userInfo[@"url"]];
+    } else {
+        NSString * url = sender.userInfo[@"url"];
+        DWWebImageOperation * operation = self.operations[url];///取出下载任务
+        operation.finished = YES;
     }
 }
 
@@ -242,17 +246,24 @@ @interface DWWebImageDownloader ()
 @implementation DWWebImageDownloader
 
 #pragma mark --- 接口方法 ---
--(instancetype)initWithUrl:(NSString *)url session:(NSURLSession *)session
-{
+-(instancetype)initWithSession:(NSURLSession *)session {
     self = [super init];
     if (self) {
-        _url = url;
         _session = session;
         _downloadFinish = NO;
     }
     return self;
 }
 
+-(instancetype)initWithUrl:(NSString *)url session:(NSURLSession *)session
+{
+    self = [self initWithSession:session];
+    if (self) {
+        _url = url;
+    }
+    return self;
+}
+
 -(void)downloadImageWithUrlString:(NSString *)url
 {
     if (!url.length) {
@@ -264,6 +275,14 @@ -(void)downloadImageWithUrlString:(NSString *)url
     [self downloadImageWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];
 }
 
+-(void)resume {
+    [self.task resume];
+}
+
+-(void)cancel {
+    [self.task cancel];
+}
+
 #pragma mark --- Tool Method ---
 -(void)downloadImageWithRequest:(NSURLRequest *)request
 {
@@ -326,7 +345,7 @@ -(void)downloadImageWithRequest:(NSURLRequest *)request
 
 #pragma mark --- DWWebImageOperation ---
 @implementation DWWebImageOperation
-
+@synthesize finished = _finished;
 -(instancetype)initWithUrl:(NSString *)url session:(NSURLSession *)session
 {
     self = [super init];
@@ -340,13 +359,19 @@ -(instancetype)initWithUrl:(NSString *)url session:(NSURLSession *)session
 -(void)start
 {
     [super start];
-    [self.donwloader.task resume];
+    [self.donwloader resume];
 }
 
 -(void)cancel
 {
     [super cancel];
-    [self.donwloader.task cancel];
+    [self.donwloader cancel];
+}
+
+-(void)setFinished:(BOOL)finished {
+    [self willChangeValueForKey:@"isFinished"];
+    _finished = finished;
+    [self didChangeValueForKey:@"isFinished"];
 }
 
 @end