diff --git a/AsyncImageView/AsyncImageView.h b/AsyncImageView/AsyncImageView.h
index 7b1b64d..ad89a8e 100755
--- a/AsyncImageView/AsyncImageView.h
+++ b/AsyncImageView/AsyncImageView.h
@@ -35,6 +35,12 @@
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wobjc-missing-property-synthesis"
 
+@protocol CustomAsyncImageViewActivityProtocol <NSObject>
+
+-(void)updateProgress:(float)percent;
+-(void)startAnimating;
+-(void)stopAnimating;
+@end
 
 extern NSString *const AsyncImageLoadDidFinish;
 extern NSString *const AsyncImageLoadDidFail;
@@ -76,11 +82,11 @@ extern NSString *const AsyncImageErrorKey;
 
 
 @interface AsyncImageView : UIImageView
-
+@property (nonatomic) UIView<CustomAsyncImageViewActivityProtocol>* customActivityView;
 @property (nonatomic, assign) BOOL showActivityIndicator;
 @property (nonatomic, assign) UIActivityIndicatorViewStyle activityIndicatorStyle;
 @property (nonatomic, assign) NSTimeInterval crossfadeDuration;
-
+@property (nonatomic, strong) NSURL *currentImageURL;
 @end
 
 
diff --git a/AsyncImageView/AsyncImageView.m b/AsyncImageView/AsyncImageView.m
index a366de9..f88321a 100755
--- a/AsyncImageView/AsyncImageView.m
+++ b/AsyncImageView/AsyncImageView.m
@@ -62,6 +62,7 @@ @interface AsyncImageConnection : NSObject
 @property (nonatomic, assign) SEL failure;
 @property (nonatomic, getter = isLoading) BOOL loading;
 @property (nonatomic, getter = isCancelled) BOOL cancelled;
+@property (nonatomic) float expectedLength;
 
 - (AsyncImageConnection *)initWithURL:(NSURL *)URL
                                 cache:(NSCache *)cache
@@ -205,15 +206,21 @@ - (void)processDataInBackground:(NSData *)data
 	}
 }
 
-- (void)connection:(__unused NSURLConnection *)connection didReceiveResponse:(__unused NSURLResponse *)response
+- (void)connection:(__unused NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
 {
     self.data = [NSMutableData data];
+    self.expectedLength = response.expectedContentLength;
 }
 
 - (void)connection:(__unused NSURLConnection *)connection didReceiveData:(NSData *)data
 {
     //add data
     [self.data appendData:data];
+
+    double percent = (double)self.data.length / self.expectedLength;
+    SEL selector = NSSelectorFromString(@"updateProgress:");
+    if ([self.target respondsToSelector:selector])
+        [self.target performSelector:selector withObject:@(percent) afterDelay:0];
 }
 
 - (void)connectionDidFinishLoading:(__unused NSURLConnection *)connection
@@ -577,7 +584,7 @@ @implementation UIImageView(AsyncImageView)
 
 - (void)setImageURL:(NSURL *)imageURL
 {
-	[[AsyncImageLoader sharedLoader] loadImageWithURL:imageURL target:self action:@selector(setImage:)];
+    [[AsyncImageLoader sharedLoader] loadImageWithURL:imageURL target:self action:@selector(setImage:)];
 }
 
 - (NSURL *)imageURL
@@ -589,9 +596,9 @@ - (NSURL *)imageURL
 
 
 @interface AsyncImageView ()
+-(void)updateProgress:(NSNumber *)percent;
 
 @property (nonatomic, strong) UIActivityIndicatorView *activityView;
-
 @end
 
 
@@ -622,6 +629,13 @@ - (id)initWithCoder:(NSCoder *)aDecoder
     return self;
 }
 
+-(void)setCustomActivityView:(UIView<CustomAsyncImageViewActivityProtocol>*)customActivityView {
+    _customActivityView = customActivityView;
+    _customActivityView.center = CGPointMake(self.bounds.size.width / 2.0f, self.bounds.size.height / 2.0f);
+
+    [self addSubview:_customActivityView];
+}
+
 - (void)setImageURL:(NSURL *)imageURL
 {
     UIImage *image = [[AsyncImageLoader sharedLoader].cache objectForKey:imageURL];
@@ -631,17 +645,23 @@ - (void)setImageURL:(NSURL *)imageURL
         return;
     }
     super.imageURL = imageURL;
+    self.currentImageURL = imageURL;
     if (self.showActivityIndicator && !self.image && imageURL)
     {
-        if (self.activityView == nil)
-        {
-            self.activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:self.activityIndicatorStyle];
-            self.activityView.hidesWhenStopped = YES;
-            self.activityView.center = CGPointMake(self.bounds.size.width / 2.0f, self.bounds.size.height / 2.0f);
-            self.activityView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
-            [self addSubview:self.activityView];
+        if (self.customActivityView) {
+            [self.customActivityView startAnimating];
+        }
+        else {
+            if (self.activityView == nil)
+            {
+                self.activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:self.activityIndicatorStyle];
+                self.activityView.hidesWhenStopped = YES;
+                self.activityView.center = CGPointMake(self.bounds.size.width / 2.0f, self.bounds.size.height / 2.0f);
+                self.activityView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
+                [self addSubview:self.activityView];
+            }
+            [self.activityView startAnimating];
         }
-        [self.activityView startAnimating];
     }
 }
 
@@ -663,7 +683,18 @@ - (void)setImage:(UIImage *)image
         [self.layer addAnimation:animation forKey:nil];
     }
     super.image = image;
-    [self.activityView stopAnimating];
+    if (!self.customActivityView) {
+        [self.activityView stopAnimating];
+    }
+    else {
+        [self.customActivityView stopAnimating];
+    }
+}
+
+-(void)updateProgress:(NSNumber *)percent {
+    if (self.customActivityView) {
+        [self.customActivityView updateProgress:[percent floatValue]];
+    }
 }
 
 - (void)dealloc