update readme.md for iOS lib

STK for iOS/README.md

@@ -1,38 +1,74 @@
-##Usage
+##Setup
 
-1. Drag and drop **STK.xcodeproj** into your Xcode project.
+1. Clone or download the STK into a folder within your project.
+
+1. Open the **STK for iOS** folder, and drag and drop **STK.xcodeproj** into your Xcode project.
 
 1. Open your project's settings, open the *Build Phases* tab. In the *Link Binary with Libraries* section, add **libSTK.a**. 
+![][linking_libSTK]
 
-1. Add the STK's **include** folder to your project's header search paths: `../stk/include/`. Use `..` for each step above you need to go. 
+1. In your project's settings, open the *Build Settings* tab. In the *Search Paths* section, double click on the field to the right of *Header Search Paths*, and add the path to the STK's **include** folder relative to your Xcode project.
+![][header_search_paths]
 
-1. Import the STK classes in the files you require:
+
+##Usage
+
+1. Import the STK classes in the source files you require. E.g.
 `#import "SineWave.h"`
 
-1. Rename any Objective-C files that import STK files with the **.mm** extension. E.g. **ViewController.m** —> **ViewController.mm**
+1. Change the extension of Objective-C files that import STK files to **.mm**. E.g. **ViewController.m** —> **ViewController.mm**
 
-1. Look at the [iOS Demo project](..projects/demo/iOS%20Demo) for a sample usage. 
+You can also look at the [iOS Demo project](..projects/demo/iOS%20Demo) for a sample usage. 
 
 
-1. If you use a class that makes use of raw waves (such as `Mandolin`, `Wurley`, or `Rhodey`) you need to copy the STK's raw wave files into your bundle. You'll know you need to if you get this runtime error: 
+##Troubleshooting
+
+###`Lexical or preprocessor Issue 'FileName.h' file not found
+
+You have the wrong header search path in your project's settings. 
+
+This is the path to the STK's **include** folder relative to your project's folder (as if you were `cd`ing into it). For example, it is `../stk/include/` if both share the same directory, but it would be `stk/include/` if the stk folder is inside your project's folder. 
+
+If this problem doesn't go away:
+
+1. Delete **STK.xcodeproj** from your Xcode project
+1. Move the STK directory within your project's directory. 
+1. Follow step 1 from **Setup**, add `stk/include` to the *Header Search Paths*.
+
+[!](header_search_paths)
+
+
+###Raw waves
+
+If you use a class that makes use of raw waves (such as `Mandolin`, `Wurley`, or `Rhodey`) you need to copy the STK's raw wave files into your bundle. You'll know you need to if you get this runtime error: 
 `FileRead::open: could not open or find file (../../rawwaves/filename.raw)!`
-You then need to copy the rawwaves into your bundle. Open your project's settings, open the *Build Phases* tab. In the *Copy Bundle Resources*, drag and drop **rawwaves.bundle** (it's located in **STK.xcodeproj**'s **Helpers** folder). 
 
-Add this code once in your app if using a class that needs the raw waves: 
+1. Open your project's settings, open the *Build Phases* tab. 
+1. In the *Copy Bundle Resources*, drag and drop **rawwaves.bundle** (it's located in **STK.xcodeproj**'s **Helpers** folder). 
+1. Then add this code before using a class that needs the raw waves: 
 
 ```objective-c
 NSBundle *rawwaveBundle = [NSBundle bundleWithURL:[[NSBundle mainBundle] URLForResource:@"rawwaves" withExtension:@"bundle"]];
 stk::Stk::setRawwavePath([[rawwaveBundle resourcePath] UTF8String]);
 ```
 
-If you get a `rawwaves.bundle: No such file or directory` error:
+
+###`rawwaves.bundle: No such file or directory`
 
 This means that **rawwaves.bundle** hasn't been copied to the build folder, so you'll need to do it manually:
 
 Select the rawwaves scheme:
 
-  ![][rawwaves_scheme]
+![][rawwaves_scheme]
   
 Build it (⌘+B)  then build your project's main scheme. 
 
+###`Apple Mach-O Linker Error`
+
+This means that **STKLib.a** isn't being linked to your binary. Follow step 2 above in Setup. 
+
+
 [rawwaves_scheme]: http://i.imgur.com/PKd7epf.png
+
+[linking_libSTK]: http://i.imgur.com/cLbGrtq.png
+[header_search_paths]: http://i.imgur.com/iBTC06h.png