Merge pull request alexdrone#53 from potsky/master

Fix wrong substring value

README.md

@@ -42,6 +42,51 @@ It is possible to use one the font-awesome icon as a default placeholder for an
     imageView.image = nil;
     [imageView setDefaultIconIdentifier:@"fa-github"];
 
+
+Troubleshooting
+--------------------
+
+### Some icons are not available on some devices
+
+Keep in mind that if you have installed the FontAwesome font in your iOS system (with [InstaFont](https://itunes.apple.com/us/app/instafont-install-any-new/id1020299046) for example), the embedded font in your App will not be used! So if your system FontAwesome font is v4.2, you will never be able to display icons from v4.3 and v4.4 for example from the embedded font.
+
+Two solutions :
+
+1. Remove the font profile from your iOS device
+2. Rename the Postscript name of file `FontAwesome.ttf` with a tool like [ttx](https://github.com/behdad/fonttools/) for example and use the new name in `NSString+FontAwesome.h`
+
+Here is the step by step for second solution :
+
+- Install fonttools
+  ```
+  git clone https://github.com/behdad/fonttools.git ;
+  cd fonttools/
+  sudo python setup.py install
+  ```
+
+- Convert the `FontAwesome.ttf` file to `ttx` format
+  ```
+  cd your_app/Pods/FontAwesome+iOS/Resources/
+  ttx FontAwesome.ttf
+  ```
+
+- Replace all occurence of `FontAwesome` with `FontAwesome440` for example in `ttx` file and save
+
+- Convert back `ttx` font to `ttf`
+  ```
+  ttx FontAwesome.ttx
+  mv FontAwesome.ttf FontAwesome.ttf.orig
+  mv FontAwesome#1.ttf FontAwesome.ttf
+  ```
+
+- In file `NSString+FontAwesome.h`, change font Postscript name :
+  ```
+  static NSString *const kFontAwesomeFamilyName = @"FontAwesome440";
+  ```
+
+- Build, run and dance
+
+
 License
 -------------------
 

UIImage+FontAwesome.m

@@ -57,7 +57,7 @@ +(UIImage*)imageWithIcon:(NSString*)identifier backgroundColor:(UIColor*)bgColor
 
     //// Abstracted Attributes
     NSString* textContent = identifier;
-    if (identifier.length > 3 && [[identifier substringToIndex:2] isEqualToString:@"fa-"]) {
+    if (identifier.length > 3 && [[identifier substringToIndex:3] isEqualToString:@"fa-"]) {
         textContent = [NSString fontAwesomeIconStringForIconIdentifier:identifier];
     }
 
@@ -106,7 +106,7 @@ +(UIImage*)imageWithIcon:(NSString*)identifier backgroundColor:(UIColor*)bgColor
 
     //// Abstracted Attributes
     NSString* textContent = identifier;
-    if (identifier.length > 3 && [[identifier substringToIndex:2] isEqualToString:@"fa-"]) {
+    if (identifier.length > 3 && [[identifier substringToIndex:3] isEqualToString:@"fa-"]) {
         textContent = [NSString fontAwesomeIconStringForIconIdentifier:identifier];
     }