Improve fetching the optimal icon of an app for the update view

Classes/BITHockeyBaseManager.m

@@ -99,25 +99,7 @@
 }
 
 - (BOOL)isPreiOS7Environment {
-  static BOOL isPreiOS7Environment = YES;
-  static dispatch_once_t checkOS;
-  
-  dispatch_once(&checkOS, ^{
-    // we only perform this runtime check if this is build against at least iOS7 base SDK
-#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1
-    // runtime check according to
-    // https://developer.apple.com/library/prerelease/ios/documentation/UserExperience/Conceptual/TransitionGuide/SupportingEarlieriOS.html
-    if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
-      isPreiOS7Environment = YES;
-    } else {
-      isPreiOS7Environment = NO;
-    }
-#else
-    isPreiOS7Environment = YES;
-#endif
-  });
-  
-  return isPreiOS7Environment;
+  return bit_isPreiOS7Environment();
 }
 
 - (NSString *)getDevicePlatform {

Classes/BITHockeyHelper.h

@@ -46,6 +46,10 @@ NSString *bit_appName(NSString *placeHolderString);
 NSString *bit_UUIDPreiOS6(void);
 NSString *bit_UUID(void);
 NSString *bit_appAnonID(void);
+BOOL bit_isPreiOS7Environment(void);
+
+NSString *bit_validAppIconStringFromIcons(NSArray *icons);
+NSString *bit_validAppIconFilename(NSBundle *bundle);
 
 /* UIImage helpers */
 UIImage *bit_roundedCornerImage(UIImage *inputImage, NSInteger cornerSize, NSInteger borderSize);

Classes/BITHockeyHelper.m

@@ -216,6 +216,114 @@ NSString *bit_appAnonID(void) {
   return appAnonID;
 }
 
+BOOL bit_isPreiOS7Environment(void) {
+  static BOOL isPreiOS7Environment = YES;
+  static dispatch_once_t checkOS;
+  
+  dispatch_once(&checkOS, ^{
+    // we only perform this runtime check if this is build against at least iOS7 base SDK
+#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1
+    // runtime check according to
+    // https://developer.apple.com/library/prerelease/ios/documentation/UserExperience/Conceptual/TransitionGuide/SupportingEarlieriOS.html
+    if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
+      isPreiOS7Environment = YES;
+    } else {
+      isPreiOS7Environment = NO;
+    }
+#else
+    isPreiOS7Environment = YES;
+#endif
+  });
+  
+  return isPreiOS7Environment;
+}
+
+/**
+ Find a valid app icon filename that points to a proper app icon image
+ 
+ @param icons NSArray with app icon filenames
+ 
+ @return NSString with the valid app icon or nil if none found
+ */
+NSString *bit_validAppIconStringFromIcons(NSArray *icons) {
+  if (!icons) return nil;
+  if (![icons isKindOfClass:[NSArray class]]) return nil;
+  
+  BOOL useHighResIcon = NO;
+  BOOL useiPadIcon = NO;
+  if ([UIScreen mainScreen].scale == 2.0f) useHighResIcon = YES;
+  if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) useiPadIcon = YES;
+  
+  NSString *currentBestMatch = nil;
+  float currentBestMatchHeight = 0;
+  float bestMatchHeight = 0;
+
+  if (bit_isPreiOS7Environment()) {
+    bestMatchHeight = useiPadIcon ? (useHighResIcon ? 144 : 72) : (useHighResIcon ? 114 : 57);
+  } else {
+    bestMatchHeight = useiPadIcon ? (useHighResIcon ? 152 : 76) : 120;
+  }
+  
+  for(NSString *icon in icons) {
+    // Don't use imageNamed, otherwise unit tests won't find the fixture icon
+    // and using imageWithContentsOfFile doesn't load @2x files with absolut paths (required in tests)
+    NSData *imgData = [[NSData alloc] initWithContentsOfFile:icon];
+    UIImage *iconImage = [[UIImage alloc] initWithData:imgData];
+    
+    if (iconImage) {
+      if (iconImage.size.height == bestMatchHeight) {
+        return icon;
+      } else if (iconImage.size.height < bestMatchHeight &&
+                 iconImage.size.height > currentBestMatchHeight) {
+        currentBestMatchHeight = iconImage.size.height;
+        currentBestMatch = icon;
+      }
+    }
+  }
+  
+  return currentBestMatch;
+}
+
+NSString *bit_validAppIconFilename(NSBundle *bundle) {
+  NSString *iconFilename = nil;
+  NSArray *icons = nil;
+  
+  icons = [bundle objectForInfoDictionaryKey:@"CFBundleIconFiles"];
+  iconFilename = bit_validAppIconStringFromIcons(icons);
+  
+  if (!iconFilename) {
+    icons = [bundle objectForInfoDictionaryKey:@"CFBundleIcons"];
+    if (icons && [icons isKindOfClass:[NSDictionary class]]) {
+      icons = [icons valueForKeyPath:@"CFBundlePrimaryIcon.CFBundleIconFiles"];
+    }
+    iconFilename = bit_validAppIconStringFromIcons(icons);
+  }
+  
+  // we test iPad structure anyway and use it if we find a result and don't have another one yet
+  if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
+    icons = [bundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"];
+    if (icons && [icons isKindOfClass:[NSDictionary class]]) {
+      icons = [icons valueForKeyPath:@"CFBundlePrimaryIcon.CFBundleIconFiles"];
+    }
+    NSString *iPadIconFilename = bit_validAppIconStringFromIcons(icons);
+    if (iPadIconFilename && !iconFilename) {
+      iconFilename = iPadIconFilename;
+    }
+  }
+
+  if (!iconFilename) {
+    NSString *tempFilename = [bundle objectForInfoDictionaryKey:@"CFBundleIconFile"];
+    if (tempFilename) {
+      iconFilename = bit_validAppIconStringFromIcons(@[tempFilename]);
+    }
+  }
+  
+  if (!iconFilename) {
+    iconFilename = bit_validAppIconStringFromIcons(@[@"Icon.png"]);
+  }
+  
+  return iconFilename;
+}
 
 #pragma mark UIImage private helpers
 

Classes/BITUpdateViewController.m

@@ -294,59 +294,21 @@
   }
   [self updateAppStoreHeader];
   
-  NSString *iconString = nil;
-  NSArray *icons = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleIconFiles"];
-  if (!icons) {
-    icons = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleIcons"];
-    if ((icons) && ([icons isKindOfClass:[NSDictionary class]])) {
-      icons = [icons valueForKeyPath:@"CFBundlePrimaryIcon.CFBundleIconFiles"];
+  NSString *iconFilename = bit_validAppIconFilename([NSBundle mainBundle]);
+  if (iconFilename) {
+    BOOL addGloss = YES;
+    NSNumber *prerendered = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UIPrerenderedIcon"];
+    if (prerendered) {
+      addGloss = ![prerendered boolValue];
     }
     
-    if (!icons) {
-      iconString = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleIconFile"];
-      if (!iconString) {
-        iconString = @"Icon.png";
-      }
+    if (addGloss && [self.updateManager isPreiOS7Environment]) {
+      _appStoreHeader.iconImage = [self addGlossToImage:[UIImage imageNamed:iconFilename]];
+    } else {
+      _appStoreHeader.iconImage = [UIImage imageNamed:iconFilename];
     }
   }
   
-  if (icons) {
-    BOOL useHighResIcon = NO;
-    BOOL useiPadIcon = NO;
-    if ([UIScreen mainScreen].scale == 2.0f) useHighResIcon = YES;
-    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) useiPadIcon = YES;
-
-    for(NSString *icon in icons) {
-      iconString = icon;
-      UIImage *iconImage = [UIImage imageNamed:icon];
-      
-      if (
-          (iconImage.size.height == 57 && !useHighResIcon && !useiPadIcon) ||
-          (iconImage.size.height == 114 && useHighResIcon && !useiPadIcon) ||
-          (iconImage.size.height == 120 && useHighResIcon && !useiPadIcon) ||
-          (iconImage.size.height == 72 && !useHighResIcon && useiPadIcon) ||
-          (iconImage.size.height == 76 && !useHighResIcon && useiPadIcon) ||
-          (iconImage.size.height == 144 && !useHighResIcon && useiPadIcon) ||
-          (iconImage.size.height == 152 && useHighResIcon && useiPadIcon)
-          ) {
-        // found!
-        break;
-      }
-    }
-  }
-  
-  BOOL addGloss = YES;
-  NSNumber *prerendered = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UIPrerenderedIcon"];
-  if (prerendered) {
-    addGloss = ![prerendered boolValue];
-  }
-  
-  if (addGloss && [self.updateManager isPreiOS7Environment]) {
-    _appStoreHeader.iconImage = [self addGlossToImage:[UIImage imageNamed:iconString]];
-  } else {
-    _appStoreHeader.iconImage = [UIImage imageNamed:iconString];
-  }
-  
   self.tableView.tableHeaderView = _appStoreHeader;
   
   BITStoreButtonStyle buttonStyle = BITStoreButtonStyleDefault;

Support/HockeySDK.xcodeproj/project.pbxproj

@@ -44,6 +44,8 @@
 		1E1127C916580C87007067A2 /* buttonRoundedRegular@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 1E1127C116580C87007067A2 /* buttonRoundedRegular@2x.png */; };
 		1E1127CA16580C87007067A2 /* buttonRoundedRegularHighlighted.png in Resources */ = {isa = PBXBuildFile; fileRef = 1E1127C216580C87007067A2 /* buttonRoundedRegularHighlighted.png */; };
 		1E1127CB16580C87007067A2 /* buttonRoundedRegularHighlighted@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 1E1127C316580C87007067A2 /* buttonRoundedRegularHighlighted@2x.png */; };
+		1E494AEC19491943001EFF74 /* AppIcon.png in Resources */ = {isa = PBXBuildFile; fileRef = 1E494AEA19491943001EFF74 /* AppIcon.png */; };
+		1E494AED19491943001EFF74 /* AppIcon@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 1E494AEB19491943001EFF74 /* AppIcon@2x.png */; };
 		1E49A43C1612223B00463151 /* BITFeedbackComposeViewController.h in Headers */ = {isa = PBXBuildFile; fileRef = 1E49A42D1612223B00463151 /* BITFeedbackComposeViewController.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		1E49A43F1612223B00463151 /* BITFeedbackComposeViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 1E49A42E1612223B00463151 /* BITFeedbackComposeViewController.m */; };
 		1E49A4421612223B00463151 /* BITFeedbackListViewCell.h in Headers */ = {isa = PBXBuildFile; fileRef = 1E49A42F1612223B00463151 /* BITFeedbackListViewCell.h */; };
@@ -226,6 +228,8 @@
 		1E1127C316580C87007067A2 /* buttonRoundedRegularHighlighted@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "buttonRoundedRegularHighlighted@2x.png"; sourceTree = "<group>"; };
 		1E20A57F181E9D4600D5B770 /* nl */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = nl; path = nl.lproj/HockeySDK.strings; sourceTree = "<group>"; };
 		1E36D8B816667611000B134C /* hr */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = hr; path = hr.lproj/HockeySDK.strings; sourceTree = "<group>"; };
+		1E494AEA19491943001EFF74 /* AppIcon.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = AppIcon.png; sourceTree = "<group>"; };
+		1E494AEB19491943001EFF74 /* AppIcon@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "AppIcon@2x.png"; sourceTree = "<group>"; };
 		1E49A42D1612223B00463151 /* BITFeedbackComposeViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BITFeedbackComposeViewController.h; sourceTree = "<group>"; };
 		1E49A42E1612223B00463151 /* BITFeedbackComposeViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BITFeedbackComposeViewController.m; sourceTree = "<group>"; };
 		1E49A42F1612223B00463151 /* BITFeedbackListViewCell.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BITFeedbackListViewCell.h; sourceTree = "<group>"; };
@@ -601,6 +605,8 @@
 		1EA1170216F53B49001C015C /* Fixtures */ = {
 			isa = PBXGroup;
 			children = (
+				1E494AEA19491943001EFF74 /* AppIcon.png */,
+				1E494AEB19491943001EFF74 /* AppIcon@2x.png */,
 				1EA1170316F53B49001C015C /* StoreBundleIdentifierUnknown.json */,
 				1EA1170816F53E3A001C015C /* StoreBundleIdentifierKnown.json */,
 				1E70A22F17F2F982001BB32D /* live_report_empty.plcrash */,
@@ -949,12 +955,14 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				1E494AEC19491943001EFF74 /* AppIcon.png in Resources */,
 				1EA1170C16F54A64001C015C /* HockeySDKResources.bundle in Resources */,
 				1E5A459B16F0DFC200B55C04 /* InfoPlist.strings in Resources */,
 				1E70A23417F2F982001BB32D /* live_report_signal.plcrash in Resources */,
 				1EA1170416F53B49001C015C /* StoreBundleIdentifierUnknown.json in Resources */,
 				1E70A23317F2F982001BB32D /* live_report_exception.plcrash in Resources */,
 				1E70A23217F2F982001BB32D /* live_report_empty.plcrash in Resources */,
+				1E494AED19491943001EFF74 /* AppIcon@2x.png in Resources */,
 				1EA1170916F53E3A001C015C /* StoreBundleIdentifierKnown.json in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

Support/HockeySDKTests/BITHockeyHelperTests.m

@@ -90,5 +90,63 @@
   assertThatInteger([resultString length], equalToInteger(36));
 }
 
+- (void)testValidAppIconFilename {
+  NSString *resultString = nil;
+  NSBundle *mockBundle = mock([NSBundle class]);
+  NSString *validIconPath = [[NSBundle bundleForClass:self.class] pathForResource:@"AppIcon" ofType:@"png"];
+  NSString *validIconPath2x = [[NSBundle bundleForClass:self.class] pathForResource:@"AppIcon@2x" ofType:@"png"];
+  
+  // No valid icons defined at all
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:@"invalidFilename.png"];
+  
+  resultString = bit_validAppIconFilename(mockBundle);
+  assertThat(resultString, nilValue());
+  
+  // CFBundleIconFiles contains valid filenames
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:@[validIconPath, validIconPath2x]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:nil];
+
+  resultString = bit_validAppIconFilename(mockBundle);
+  assertThat(resultString, notNilValue());
+  
+  // CFBundleIcons contains valid dictionary filenames
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:@[@"invalidFilename.png"]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:@{@"CFBundlePrimaryIcon":@{@"CFBundleIconFiles":@[validIconPath, validIconPath2x]}}];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:nil];
+
+  // CFBundleIcons contains valid ipad dictionary and valid default dictionary filenames
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:@[@"invalidFilename.png"]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:@{@"CFBundlePrimaryIcon":@{@"CFBundleIconFiles":@[validIconPath, validIconPath2x]}}];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:@{@"CFBundlePrimaryIcon":@{@"CFBundleIconFiles":@[validIconPath, validIconPath2x]}}];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:nil];
+
+  resultString = bit_validAppIconFilename(mockBundle);
+  assertThat(resultString, notNilValue());
+
+  // CFBundleIcons contains valid filenames
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:@[@"invalidFilename.png"]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:@[validIconPath, validIconPath2x]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:nil];
+
+  resultString = bit_validAppIconFilename(mockBundle);
+  assertThat(resultString, notNilValue());
+
+  // CFBundleIcon contains valid filename
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFiles"]) willReturn:@[@"invalidFilename.png"]];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIcons~ipad"]) willReturn:nil];
+  [given([mockBundle objectForInfoDictionaryKey:@"CFBundleIconFile"]) willReturn:validIconPath];
+  
+  resultString = bit_validAppIconFilename(mockBundle);
+  assertThat(resultString, notNilValue());
+}
+
 
 @end