TIMOB-17458

readme

1. Download Ti SDK https://github.com/benbahrenburg/titanium_mobile/tree/TIMOB-17458
or you can just patch by doing the following:
A) In your SDK open TiApp.m
B) add the following method 

- (void)createDefaultDirectories
{
    NSError* error = nil;
    NSURL* dir = [[NSFileManager defaultManager] URLForDirectory:NSApplicationSupportDirectory
                                     inDomain:NSUserDomainMask
                            appropriateForURL:nil
                                       create:YES
                                        error:&error];
    if(error)
    {
        DebugLog(@"[ERROR]  %@ %@", error, [error userInfo]);
    }
}

C) In the TiApp.m find the method - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions_
D) At the end of the methd right before the return add [self createDefaultDirectories];

app.js

//To test the method use the following

var dir = Ti.Filesystem.getApplicationSupportDirectory(); 
console.log(dir); 
var f = Titanium.Filesystem.getFile(Ti.Filesystem.applicationSupportDirectory);
console.log('Directory Exists: '+ (f.exists() ? 'Yes' : 'No'));

var testfile = Ti.Filesystem.getFile(Ti.Filesystem.applicationSupportDirectory, 'text.txt');
if(testfile.exists()){
	testfile.deleteFile();
}

testfile.write("text written via write()\n");
console.log("Check file at:" + testfile.nativePath);