Added delegate methods

.gitignore

@@ -6,3 +6,11 @@ Gemfile.lock
 
 Pods
 Podfile.lock
+
+WTURLImageViewDemo.xcodeproj/xcuserdata/guidosabatini.xcuserdatad/xcschemes/WTURLImageViewDemo.xcscheme
+
+WTURLImageViewDemo.xcodeproj/xcuserdata/guidosabatini.xcuserdatad/xcschemes/xcschememanagement.plist
+
+WTURLImageViewDemo.xcworkspace/xcshareddata/WTURLImageViewDemo.xccheckout
+
+WTURLImageViewDemo.xcworkspace/xcuserdata/guidosabatini.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

WTURLImageView/WTURLImageView.h

@@ -38,7 +38,7 @@ typedef NS_OPTIONS(NSUInteger, WTURLImageViewOptions) {
 
     WTURLImageViewOptionTransitionFlipFromLeft      = 8 << 20,
     WTURLImageViewOptionTransitionFlipFromRight     = 9 << 20,
-
+    
     WTURLImageViewOptionTransitionRipple            = 10 << 20,
     WTURLImageViewOptionTransitionCubeFromTop       = 11 << 20,
     WTURLImageViewOptionTransitionCubeFromLeft      = 12 << 20,
@@ -53,6 +53,8 @@ typedef NS_OPTIONS(NSUInteger, WTURLImageViewOptions) {
 // with userInteraction is set in the view, user can receive click event
 @protocol WTURLImageViewDelegate <NSObject>
 - (void) URLImageViewDidClicked : (WTURLImageView*)imageView;
+- (void) URLImageView:(WTURLImageView*)imageView didChangeImageWithSuccess:(UIImage*)newImage;
+- (void) URLImageViewDidChangeImageWithFailure:(WTURLImageView*)imageView;
 @end
 
 

WTURLImageView/WTURLImageView.m

@@ -119,11 +119,15 @@ - (void) endLoadImage : (UIImage*) image
         UIActivityIndicatorView *aiv = [self activityIndicator];
         [aiv stopAnimating];
     }
-
+    
     if (image==nil)
     {
         // no image failed
         if (failedImage) self.image = failedImage;
+        if ([_delegate respondsToSelector:@selector(URLImageViewDidChangeImageWithFailure:)])
+        {
+            [_delegate URLImageViewDidChangeImageWithFailure:self];
+        }
         return;
     }
 
@@ -132,10 +136,18 @@ - (void) endLoadImage : (UIImage*) image
     image = [self resizedImage:image fillType:fillType];
     if ((fromCache && !(options & WTURLImageViewOptionAnimateEvenCache)) || effect==UIViewAnimationOptionTransitionNone) {
         self.image = image;
+        if ([_delegate respondsToSelector:@selector(URLImageView:didChangeImageWithSuccess:)])
+        {
+            [_delegate URLImageView:self didChangeImageWithSuccess:image];
+        }
     }
     else {
         // show image with animation
         [self wt_makeTransition: image effect:effect];
+        if ([_delegate respondsToSelector:@selector(URLImageView:didChangeImageWithSuccess:)])
+        {
+            [_delegate URLImageView:self didChangeImageWithSuccess:image];
+        }
     }
 }
 
@@ -257,7 +269,7 @@ - (void) setURL:(NSURL*)url withPreset:(WTURLImageViewPreset*) preset
          options:preset.options
 placeholderImage:preset.placeholderImage
      failedImage:preset.failedImage
-     diskCacheTimeoutInterval:preset.diskCacheTimeInterval];
+diskCacheTimeoutInterval:preset.diskCacheTimeInterval];
 }
 
 - (void) reloadWithPreset : (WTURLImageViewPreset*)preset

WTURLImageViewDemo/WTViewController.h

@@ -9,7 +9,7 @@
 #import <UIKit/UIKit.h>
 #import "WTURLImageView.h"
 
-@interface WTViewController : UIViewController
+@interface WTViewController : UIViewController <WTURLImageViewDelegate>
 
 @property (weak, nonatomic) IBOutlet WTURLImageView *imageView;
 
@@ -20,5 +20,6 @@
 - (IBAction)doActivityIndicator:(id)sender;
 - (IBAction)doTransition:(id)sender;
 - (IBAction)doResize:(id)sender;
+- (IBAction)doSetDelegate:(id)sender;
 
 @end

WTURLImageViewDemo/WTViewController.m

@@ -107,4 +107,22 @@ - (IBAction)doResize:(UISegmentedControl *)sender {
 
 }
 
+- (IBAction)doSetDelegate:(UISwitch *)sender {
+    self.imageView.delegate = sender.isOn ? self : nil;
+}
+
+#pragma mark - WTURLImageViewDelegate
+
+- (void)URLImageView:(WTURLImageView *)imageView didChangeImageWithSuccess:(UIImage *)newImage
+{
+    UIAlertView* alert = [[UIAlertView alloc] initWithTitle:nil message:@"Image changed with success" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
+    [alert show];
+}
+
+- (void)URLImageViewDidChangeImageWithFailure:(WTURLImageView *)imageView
+{
+    UIAlertView* alert = [[UIAlertView alloc] initWithTitle:nil message:@"Image load failed" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
+    [alert show];
+}
+
 @end